Ford Remote Starter ST1137 A User Manual

303-06-1  
Starting System  
303-06-1  
DIAGNOSIS AND TESTING  
Starting System  
Inspection and Verification  
Refer to Wiring Diagrams Cell 20, Starting System  
for schematic and connector information.  
WARNING: When servicing the starter  
motor or carrying out other underhood work in  
the vicinity of the starter motor, be aware that  
the heavy gauge battery input lead at the starter  
solenoid is ``electrically hot'' at all times. A  
protective cap or boot is provided over the  
terminal of this lead and must be installed after  
servicing. Failure to follow these instructions may  
result in personal injury.  
Special Tool(s)  
73 Digital Multimeter  
105-R0051 or equivalent  
WARNING: When working in the area of  
the starter motor, be careful to avoid touching  
hot exhaust components. Failure to follow these  
instructions may result in personal injury.  
SABRE Premium Battery and  
Electrical System Tester  
010-00730 or equivalent  
NOTE: When working on the starter system, make  
sure the anti-theft system is deactivated, if equipped.  
1. Verify the customer concern by operating the  
starting system.  
Worldwide Diagnostic System  
(WDS)  
Vehicle Communication Module  
(VCM) with appropriate  
adapters, or equivalent  
diagnostic tool  
2. Visually inspect for obvious signs of  
mechanical and electrical damage. Refer to the  
following chart:  
Visual Inspection Chart  
Mechanical  
· Starter motor  
· Brackets  
Electrical  
· Battery  
· Smart junction box  
(SJB) fuse:  
Ð 21 (10A)  
· Bussed electrical center  
(BEC) fuse:  
Ð 3 (30A)  
· Anti-theft system  
· Damaged wiring harness  
· Loose or corroded  
connections  
Principles of Operation  
The starting system is electronically controlled by  
the passive anti-theft system (PATS). The PATS  
recognizes the correct electronically coded ignition  
key and signals the instrument cluster to provide a  
ground for the starter relay. The energized relay  
provides voltage to the starter solenoid with the key  
in the START position, thereby allowing the starter  
motor to activate.  
3. If an obvious cause for an observed or reported  
concern is found, correct the cause (if possible)  
before proceeding to the next step.  
4. If the cause is not visually evident, connect the  
diagnostic tool to the data link connector (DLC)  
and select the vehicle to be tested from the  
diagnostic tool menu. If the diagnostic tool does  
not communicate with the vehicle:  
·
check that the program card is correctly  
installed.  
·
·
check the connections to the vehicle.  
check the ignition switch position.  
Copyright 2004, Ford Motor Company  
Last updated: 12/8/2004  
2005 Mustang, 12/2004  
 
303-06-3  
Starting System  
303-06-3  
DIAGNOSIS AND TESTING (Continued)  
Symptom Chart  
Symptom Chart  
Condition  
The engine does not crank  
and the relay does not click  
Possible Sources  
Action  
·
·
·
·
·
·
Battery  
·
Fuse  
Starter relay  
Ignition switch  
Digital transmission range  
(TR) sensor (automatic  
transmission only)  
Clutch pedal position (CPP)  
switch (manual transmission  
only)  
·
·
Circuit  
·
The engine does not crank  
and the relay does click  
·
·
·
·
·
Fuse  
·
Battery  
Starter motor/solenoid  
Ignition switch  
Circuit  
·
·
·
The engine cranks slowly  
Unusual starter noise  
·
·
·
·
·
·
Battery  
·
·
·
Starter motor/solenoid  
Circuit  
Starter mounting  
Flexplate or flywheel  
Starter motor  
The starter spins but the  
engine does not crank  
·
·
Starter motor  
Damaged flexplate or  
flywheel ring gear teeth  
INSPECT the starter motor  
mounting and engagement.  
INSTALL a new starter  
motor. REFER to Starter  
Motor Р4.0L SOHC or  
Starter Motor Р4.6L (3V) in  
this section.  
INSPECT the flexplate or  
flywheel for damaged,  
missing or worn teeth.  
REPAIR as required.  
·
Pinpoint Tests  
For automatic transmission equipped vehicles,  
voltage is supplied from the SJB to the digital  
transmission range (TR) sensor through circuit 32  
(RD/LB). In PARK or NEUTRAL, voltage is  
supplied from the TR sensor through circuit 33  
(WH/PK) to the starter relay coil located in the  
BEC. The starter relay coil is supplied ground from  
the PCM through circuit 1419 (LG/YE).  
Pinpoint Test A: The Engine Does Not Crank  
And The Relay Does Not Click  
Normal Operation  
In normal operation, voltage from the bussed  
electrical center (BEC) is supplied to the ignition  
switch through circuit 1050 (LG/PK). When the  
ignition switch is placed in the START position,  
voltage is supplied through circuit 1522 (DG) to the  
smart junction box (SJB).  
For manual transmission equipped vehicles, voltage  
from the SJB is supplied to the clutch pedal position  
switch (CPP) through circuit 32 (RD/LB). When the  
clutch pedal is depressed, voltage is supplied from  
the CPP to the starter relay coil located in the BEC  
through circuit 32 (RD/LB). The starter relay coil is  
supplied ground from the PCM through circuit 1419  
(LG/YE).  
2005 Mustang, 12/2004  
 
   
303-06-4  
Starting System  
303-06-4  
DIAGNOSIS AND TESTING (Continued)  
Possible Causes  
When the starter relay is energized, voltage supplied  
to the relay switch is sent to the starter motor  
solenoid through circuit 113 (YE/LB). Battery  
voltage is supplied to the starter motor through  
circuit 2037 (RD) at all times.  
· Fuse(s)  
· An open in battery voltage feed BEC, 2037 (RD)  
or 113 (YE/LB)  
· Starter motor relay  
· Starter  
PINPOINT TEST A: THE ENGINE DOES NOT CRANK AND THE RELAY DOES NOT CLICK  
Test Step  
Result / Action to Take  
A1  
CHECK THE BATTERY  
·
Check the battery condition and charge if necessary. Refer to  
Section 414-01.  
Is the battery OK?  
Yes  
·
No  
CHARGE or INSTALL a new battery as  
necessary. REFER to Section 414-01.  
TEST the system for normal operation.  
A2  
A3  
CHECK FOR PATS DTCS  
·
NOTE: The PATS DTCs are the only DTCs of concern in this  
step. Only repair retrieved non-PATS DTCs if a customer  
concern is reported.  
Yes  
GO to Section 419-01B to diagnose the  
PATS DTCs.  
Check for PATS DTCs.  
Were any PATS DTCs retrieved?  
No  
·
CHECK CIRCUIT 33 (WH/PK) (CIRCUIT 32 [RD/LB] MANUAL  
TRANSMISSION ONLY) FOR VOLTAGE  
·
·
·
Disconnect: Starter Motor Relay.  
Key in START position.  
If equipped, fully depress the clutch pedal.  
(Continued)  
2005 Mustang, 12/2004  
 
   
303-06-5  
Starting System  
303-06-5  
DIAGNOSIS AND TESTING (Continued)  
PINPOINT TEST A: THE ENGINE DOES NOT CRANK AND THE RELAY DOES NOT CLICK (Continued)  
Test Step  
Result / Action to Take  
A3  
CHECK CIRCUIT 33 (WH/PK) (CIRCUIT 32 [RD/LB] MANUAL  
TRANSMISSION ONLY) FOR VOLTAGE (Continued)  
·
Measure the voltage between starter motor relay C1017-85,  
circuit 33 (WH/PK) (circuit 32 [RD/LB] manual transmission only)  
and ground while holding the key in the START position and  
with the clutch pedal, if equipped, fully depressed.  
Yes  
No  
Vehicles equipped with an automatic  
transmission, GO to A4. Vehicles  
equipped with a manual transmission, GO  
to A7.  
A4  
CHECK CIRCUIT 32 (RD/LB) FOR VOLTAGE AT THE DIGITAL  
TR SENSOR (AUTOMATIC TRANSMISSION ONLY)  
·
·
·
Key in OFF position.  
Disconnect: Digital TR Sensor C167.  
Key in START position.  
(Continued)  
2005 Mustang, 12/2004  
 
 
303-06-6  
Starting System  
303-06-6  
DIAGNOSIS AND TESTING (Continued)  
PINPOINT TEST A: THE ENGINE DOES NOT CRANK AND THE RELAY DOES NOT CLICK (Continued)  
Test Step  
Result / Action to Take  
A4  
CHECK CIRCUIT 32 (RD/LB) FOR VOLTAGE AT THE DIGITAL  
TR SENSOR (AUTOMATIC TRANSMISSION ONLY) (Continued)  
·
Measure the voltage between digital TR sensor C167-10, circuit  
32 (RD/LB) and ground while holding the key in the START  
position.  
Yes  
No  
·
Is the voltage greater than 10 volts?  
A5  
CHECK CIRCUIT 33 (WH/PK) FOR AN OPEN  
·
·
Key in OFF position.  
Measure the resistance between digital TR sensor C167-12,  
circuit 33 (WH/PK) and starter motor relay C1017-85, circuit 33  
(WH/PK).  
Yes  
No  
REPAIR circuit 33 (WH/PK). TEST the  
system for normal operation.  
·
Is the resistance less than 5 ohms?  
(Continued)  
2005 Mustang, 12/2004  
 
 
303-06-7  
Starting System  
303-06-7  
DIAGNOSIS AND TESTING (Continued)  
PINPOINT TEST A: THE ENGINE DOES NOT CRANK AND THE RELAY DOES NOT CLICK (Continued)  
Test Step  
Result / Action to Take  
A6  
CHECK DIGITAL TR SENSOR ADJUSTMENT  
·
Carry out the digital TR sensor adjustment. Refer to Section  
307-01.  
Is the digital TR sensor adjusted correctly?  
Yes  
INSTALL a new digital TR sensor. TEST  
the system for normal operation.  
·
No  
ADJUST the digital TR sensor as  
necessary. TEST the system for normal  
operation.  
A7  
CHECK CIRCUIT 32 (RD/LB) FOR VOLTAGE AT THE CLUTCH  
PEDAL POSITION (CPP) SWITCH  
·
·
·
·
Key in OFF position.  
Disconnect: CPP Switch C257.  
Key in START position.  
Measure the voltage between CPP switch C257-1, circuit 32  
(RD/LB) and ground while holding the key in the START  
position.  
Yes  
No  
·
Is the voltage greater than 10 volts?  
A8  
CHECK CIRCUIT 1522 (DG) FOR AN OPEN  
·
·
·
·
Key in OFF position.  
Disconnect: SJB Fuse 21.  
Key in START position.  
Measure the voltage between SJB fuse 21, circuit 1522 (DG)  
and ground while holding the key in the START position.  
Yes  
REPAIR circuit 32 (RD/LB). TEST the  
system for normal operation.  
No  
·
Is the voltage greater than 10 volts?  
A9  
CHECK CIRCUIT 1050 (LG/PK) FOR VOLTAGE  
·
·
Key in OFF position.  
Disconnect: Ignition Switch C250.  
(Continued)  
2005 Mustang, 12/2004  
 
       
303-06-8  
Starting System  
303-06-8  
DIAGNOSIS AND TESTING (Continued)  
PINPOINT TEST A: THE ENGINE DOES NOT CRANK AND THE RELAY DOES NOT CLICK (Continued)  
Test Step  
Result / Action to Take  
A9  
CHECK CIRCUIT 1050 (LG/PK) FOR VOLTAGE (Continued)  
·
Measure the voltage between ignition switch C250-4, circuit  
1050 (LG/PK) and ground.  
Yes  
No  
REPAIR circuit 1050 (LG/PK). TEST the  
system for normal operation.  
·
Is the voltage greater than 10 volts?  
A10 CHECK CIRCUIT 1522 (DG) FOR AN OPEN  
·
Measure the resistance between ignition switch C250-7, circuit  
1522 (DG) and SJB fuse 21.  
Is the resistance less than 5 ohms?  
Yes  
INSTALL a new ignition switch. REFER to  
Section 211-05. TEST the system for  
normal operation.  
·
No  
REPAIR circuit 1522 (DG). TEST the  
system for normal operation.  
A11 CHECK CIRCUIT 32 (RD/LB) FOR AN OPEN  
Key in OFF position.  
·
(Continued)  
2005 Mustang, 12/2004  
 
   
303-06-9  
Starting System  
303-06-9  
DIAGNOSIS AND TESTING (Continued)  
PINPOINT TEST A: THE ENGINE DOES NOT CRANK AND THE RELAY DOES NOT CLICK (Continued)  
Test Step  
Result / Action to Take  
A11 CHECK CIRCUIT 32 (RD/LB) FOR AN OPEN (Continued)  
·
Measure the resistance between CPP switch C257-2, circuit 32  
(RD/LB) and starter motor relay C1017-85, circuit 32 (RD/LB).  
Yes  
INSTALL a new CPP switch. REFER to  
Section 303-14. TEST the system for  
normal operation.  
No  
REPAIR circuit 32 (RD/LB). TEST the  
system for normal operation.  
·
Is the resistance less than 5 ohms?  
A12 CHECK THE STARTER MOTOR RELAY GROUND CIRCUIT FOR  
AN OPEN  
·
Key in START position.  
(Continued)  
2005 Mustang, 12/2004  
 
 
303-06-10  
Starting System  
303-06-10  
DIAGNOSIS AND TESTING (Continued)  
PINPOINT TEST A: THE ENGINE DOES NOT CRANK AND THE RELAY DOES NOT CLICK (Continued)  
Test Step  
Result / Action to Take  
A12 CHECK THE STARTER MOTOR RELAY GROUND CIRCUIT FOR  
AN OPEN (Continued)  
·
Measure the voltage between starter motor relay C1017-86,  
circuit 1419 (LG/YE) and starter motor relay C1017-85, circuit 33  
(WH/PK) (circuit 32 [RD/LB] manual transmission only) while  
holding the key in the START position and clutch pedal, if  
equipped, fully depressed.  
Yes  
INSTALL a new starter motor relay. TEST  
the system for normal operation.  
No  
·
Is the voltage greater than 10 volts?  
A13 CHECK CIRCUIT 1419 (LG/YE) FOR AN OPEN  
·
·
Key in OFF position.  
Disconnect: PCM C175B.  
(Continued)  
2005 Mustang, 12/2004  
 
 
303-06-11  
Starting System  
303-06-11  
DIAGNOSIS AND TESTING (Continued)  
PINPOINT TEST A: THE ENGINE DOES NOT CRANK AND THE RELAY DOES NOT CLICK (Continued)  
Test Step  
Result / Action to Take  
A13 CHECK CIRCUIT 1419 (LG/YE) FOR AN OPEN (Continued)  
·
Measure the resistance between PCM C175B-2, circuit 1419  
(LG/YE) and starter relay C1017-86, circuit 1419 (LG/YE).  
Yes  
INSTALL a new PCM. REFER to Section  
303-14. TEST the system for normal  
operation.  
No  
REPAIR circuit 1419 (LG/YE). TEST the  
system for normal operation.  
·
Is the resistance less than 5 ohms?  
Pinpoint Test B: The Engine Does Not Crank  
And The Relay Does Click  
For manual transmission equipped vehicles, voltage  
from the SJB is supplied to the clutch pedal position  
switch (CPP) through circuit 32 (RD/LB). When the  
clutch pedal is depressed, voltage is supplied from  
the CPP to the starter relay coil located in the BEC  
through circuit 32 (RD/LB). The starter relay coil is  
supplied ground from the PCM through circuit 1419  
(LG/YE).  
Normal Operation  
In normal operation, voltage from the bussed  
electrical center (BEC) is supplied to the ignition  
switch through circuit 1050 (LG/PK). When the  
ignition switch is placed in the START position,  
voltage is supplied through circuit 1522 (DG) to the  
smart junction box (SJB).  
When the starter relay is energized, voltage supplied  
to the relay switch is sent to the starter motor  
solenoid through circuit 113 (YE/LB). Battery  
voltage is supplied to the starter motor through  
circuit 2037 (RD) at all times.  
For automatic transmission equipped vehicles,  
voltage is supplied from the SJB to the digital  
transmission range (TR) sensor through circuit 32  
(RD/LB). In PARK or NEUTRAL, voltage is  
supplied from the TR sensor through circuit 33  
(WH/PK) to the starter relay coil located in the  
BEC. The starter relay coil is supplied ground from  
the PCM through circuit 1419 (LG/YE).  
Possible Causes  
· Fuse(s)  
· An open in circuit 1050 (LG/PK), 1522 (DG), 32  
(RD/LB), 33 (WH/PK) or 1419 (LG/YE)  
· Powertrain control module (PCM)  
2005 Mustang, 12/2004  
 
 
303-06-12  
Starting System  
303-06-12  
DIAGNOSIS AND TESTING (Continued)  
· Digital transmission range (TR) switch  
· Ignition switch  
· Starter motor relay  
· Clutch pedal position (CPP) switch  
PINPOINT TEST B: THE ENGINE DOES NOT CRANK AND THE RELAY DOES CLICK  
Test Step  
Result / Action to Take  
B1  
CHECK THE VOLTAGE TO THE STARTER RELAY  
·
Measure the voltage between starter relay C1017-30 and  
ground.  
Yes  
No  
INSTALL a new bussed electrical center  
(BEC). TEST the system for normal  
operation.  
·
Is the voltage greater than 10 volts?  
(Continued)  
2005 Mustang, 12/2004  
 
303-06-13  
Starting System  
303-06-13  
DIAGNOSIS AND TESTING (Continued)  
PINPOINT TEST B: THE ENGINE DOES NOT CRANK AND THE RELAY DOES CLICK (Continued)  
Test Step  
Result / Action to Take  
B2  
CHECK THE VOLTAGE TO THE STARTER MOTOR SOLENOID  
·
Measure the voltage between starter motor solenoid positive  
terminal and ground.  
Yes  
No  
REPAIR circuit 2037 (RD) for an open.  
TEST the system for normal operation.  
·
Is the voltage 10 volts or greater?  
B3  
MANUALLY JUMP THE STARTER MOTOR  
·
Connect one end of a fused (15A) jumper wire to the positive  
terminal of the battery and touch the other end to the starter  
solenoid S-terminal.  
Yes  
No  
INSTALL a new starter motor. REFER to  
Starter Motor Р4.0L SOHC or Starter  
Motor Р4.6L (3V) in this section. TEST  
the system for normal operation.  
·
Does the starter solenoid engage?  
B4  
TEST THE STARTER MOTOR RELAY  
·
Carry out the relay component test on the starter motor relay.  
Refer to Wiring Diagrams Cell 149 for component testing.  
Does the starter motor relay test good?  
Yes  
REPAIR circuit 113 (YE/LB) for an open.  
TEST the system for normal operation.  
·
No  
INSTALL a new starter motor relay. TEST  
the system for normal operation.  
Pinpoint Test C: The Engine Cranks Slowly  
For automatic transmission equipped vehicles,  
voltage is supplied from the SJB to the digital  
transmission range (TR) sensor through circuit 32  
(RD/LB). In PARK or NEUTRAL, voltage is  
supplied from the TR sensor through circuit 33  
(WH/PK) to the starter relay coil located in the  
BEC. The starter relay coil is supplied ground from  
the PCM through circuit 1419 (LG/YE).  
Normal Operation  
In normal operation, voltage from the bussed  
electrical center (BEC) is supplied to the ignition  
switch through circuit 1050 (LG/PK). When the  
ignition switch is placed in the START position,  
voltage is supplied through circuit 1522 (DG) to the  
smart junction box (SJB).  
2005 Mustang, 12/2004  
 
       
303-06-14  
Starting System  
303-06-14  
DIAGNOSIS AND TESTING (Continued)  
Possible Causes  
· Fuse(s)  
For manual transmission equipped vehicles, voltage  
from the SJB is supplied to the clutch pedal position  
switch (CPP) through circuit 32 (RD/LB). When the  
clutch pedal is depressed, voltage is supplied from  
the CPP to the starter relay coil located in the BEC  
through circuit 32 (RD/LB). The starter relay coil is  
supplied ground from the PCM through circuit 1419  
(LG/YE).  
· Circuit 2037 (RD)  
· Ground circuit  
· Starter motor  
When the starter relay is energized, voltage supplied  
to the relay switch is sent to the starter motor  
solenoid through circuit 113 (YE/LB). Battery  
voltage is supplied to the starter motor through  
circuit 2037 (RD) at all times.  
PINPOINT TEST C: THE ENGINE CRANKS SLOWLY  
Test Step  
Result / Action to Take  
C1  
CHECK THE VOLTAGE TO THE STARTER  
·
·
Key in OFF position.  
Measure the voltage between starter motor solenoid positive  
terminal and ground.  
Yes  
No  
REPAIR circuit 2037 (RD). CLEAN and  
TIGHTEN the connections at the battery  
terminals. TEST the system for normal  
operation.  
·
Is the voltage 12.5 volts or greater?  
C2  
CHECK MOTOR GROUND CIRCUIT  
·
Carry out the Motor Ground Circuit test. Refer to Component  
Tests in this section.  
Is the ground OK?  
Yes  
INSTALL a new starter motor. TEST the  
system for normal operation.  
·
No  
REPAIR the ground circuit as necessary.  
TEST the system for normal operation.  
Pinpoint Test D: Unusual Starter Noise  
For automatic transmission equipped vehicles,  
voltage is supplied from the SJB to the digital  
transmission range (TR) sensor through circuit 32  
(RD/LB). In PARK or NEUTRAL, voltage is  
supplied from the TR sensor through circuit 33  
(WH/PK) to the starter relay coil located in the  
BEC. The starter relay coil is supplied ground from  
the PCM through circuit 1419 (LG/YE).  
Normal Operation  
In normal operation, voltage from the bussed  
electrical center (BEC) is supplied to the ignition  
switch through circuit 1050 (LG/PK). When the  
ignition switch is placed in the START position,  
voltage is supplied through circuit 1522 (DG) to the  
smart junction box (SJB).  
2005 Mustang, 12/2004  
 
   
303-06-15  
Starting System  
303-06-15  
DIAGNOSIS AND TESTING (Continued)  
Possible Causes  
For manual transmission equipped vehicles, voltage  
from the SJB is supplied to the clutch pedal position  
switch (CPP) through circuit 32 (RD/LB). When the  
clutch pedal is depressed, voltage is supplied from  
the CPP to the starter relay coil located in the BEC  
through circuit 32 (RD/LB). The starter relay coil is  
supplied ground from the PCM through circuit 1419  
(LG/YE).  
· Starter motor mounting  
· Starter motor mounting bolts  
· Starter motor drive  
· Flywheel or flexplate ring gear  
· Starter motor  
When the starter relay is energized, voltage supplied  
to the relay switch is sent to the starter motor  
solenoid through circuit 113 (YE/LB). Battery  
voltage is supplied to the starter motor through  
circuit 2037 (RD) at all times.  
PINPOINT TEST D: UNUSUAL STARTER NOISE  
Test Step  
Result / Action to Take  
D1  
D2  
CHECK THE STARTER MOTOR MOUNTING  
·
·
·
Inspect the starter motor mounting for cracks.  
Check the starter motor mounting bolts for looseness.  
Is the starter motor mounted correctly?  
Yes  
No  
REINSTALL the starter motor correctly.  
REFER to Starter Motor Р4.0L SOHC or  
Starter Motor Р4.6L (3V) in this section.  
INSPECT THE STARTER MOTOR  
·
Remove the starter motor. Refer to Starter Motor Р4.0L SOHC  
or Starter Motor Р4.6L (3V) in this section.  
Inspect the starter motor for damage.  
Yes  
INSTALL a new starter motor. TEST the  
system for normal operation.  
·
·
Is the starter motor damaged?  
No  
CHECK the starter drive. REFER to  
Component Tests, Starter Drive Test in  
this section. INSTALL a new starter motor.  
TEST the system for normal operation.  
Component Tests  
3. Connect the SABRE tester to the vehicle using  
the amperage lead clipped around the positive  
battery cable.  
Starter Motor РLoad Test  
WARNING: When servicing the starter  
motor or carrying out other underhood work in  
the vicinity of the starter motor, be aware that  
the heavy gauge battery input lead at the starter  
solenoid is ``electrically hot'' at all times.  
4. Measure the amperage of the starter motor  
while activating the starting system.  
5. A correctly operating starter motor will draw  
from 130 to 190 amps of current.  
Voltage Drop Tests  
CAUTION: A protective cap or boot is  
provided over the battery input terminal on all  
car lines and must be installed after repair. Be  
sure to disconnect the battery ground cable  
before repairing the starter motor.  
The following test procedures will be carried out  
with the starter motor on the vehicle.  
Motor Feed Circuit  
NOTE: Make all multimeter connections at the  
component terminal rather than the cable or wiring  
terminal.  
1. Before carrying out this test inspection, check  
the battery to determine its state of charge.  
Carry out a load test of the battery using the  
Starter, Alternator, Battery, Regulator and  
Electrical Tester (SABRE). Refer to Section  
414-00 for the test procedure.  
1. Disconnect the ignition coil connector from the  
ignition coil.  
2. Connect a remote starter switch between the  
starter solenoid S-terminal and the battery  
positive (+) post.  
2. Disconnect the ignition coil connector from the  
ignition coil.  
2005 Mustang, 12/2004  
 
 
303-06-16  
Starting System  
303-06-16  
DIAGNOSIS AND TESTING (Continued)  
3. Connect the positive (+) lead of the 73 Digital  
Multimeter to the battery positive (+) post.  
Connect the negative (-) lead of the multimeter  
to the starter solenoid M-terminal.  
4. Engage the remote starter switch and read the  
voltage. The reading should be 0.2 volt or less.  
5. If the voltage drop is greater than 0.2 volt,  
clean the negative (-) battery cable connections  
at the battery and chassis. Also, clean the  
engine ground cable connection at the cable  
mounting bracket. If the voltage drop is still  
excessive, repair or install a new battery  
ground cable.  
4. Engage the remote starter switch. The  
multimeter reading should be 0.5 volt or less.  
5. If the voltage at the M-terminal is greater than  
0.5 volt, move the multimeter negative (-) lead  
to the starter solenoid B-terminal and repeat the  
test.  
Starter Drive Test  
6. If the voltage reading at the B-terminal is less  
than 0.5 volt, the problem is either in the  
connections at the starter solenoid or the starter  
solenoid.  
1. Remove the starter motor. Refer to Starter  
Motor Р4.0L SOHC or Starter Motor Р4.6L  
(3V) in this section.  
2. Secure the starter motor in a vise.  
7. Remove the wires at the starter solenoid B-, S-  
and M-terminals. Clean the connections and  
install the cables. Repeat Steps 1 through 5  
above. If the reading is still higher than 0.5 volt  
at the M-terminal and 0.5 volt or lower at the  
B-terminal, the problem is in the starter  
3. Connect the battery ground cable of a fully  
charged battery to the case of the starter motor.  
4.  
CAUTION: Do not leave the positive  
lead of the battery connected to the starter  
motor S-terminal for more than 10 seconds.  
solenoid. Install a new starter motor. Refer to  
Starter Motor Р4.0L SOHC or Starter Motor  
Ð 4.6L (3V) in this section.  
Touch the positive lead from the battery to the  
S-terminal and verify that the starter drive  
ejects.  
8. If the voltage taken at the starter solenoid  
B-terminal is greater than 0.5 volt, the problem  
is either the positive (+) battery cable  
5. Remove the positive lead from the starter  
motor. The ejected starter drive should return to  
its original position.  
connection or the positive (+) battery cable.  
6. If the starter drive does not eject and return to  
position, replace the starter motor.  
Motor Ground Circuit  
NOTE: Make all multimeter connections at the  
component terminal rather than the cable or wiring  
terminal.  
7. Check the starter drive. It should turn freely in  
one direction, and positively engage to the  
armature when turned in the opposite direction.  
If not as specified, install a new starter motor.  
A slow cranking condition can be caused by  
resistance in the ground or return portion of the  
cranking circuit. Check the voltage drop in the  
ground circuit as follows:  
No Load Test  
The starter No Load Test will identify open or  
shorted windings and a possible rubbing starter  
motor armature or bent starter motor armature shaft.  
1. Disconnect the ignition coil connector from the  
ignition coil.  
2. Connect a remote starter switch between the  
starter solenoid S-terminal and the battery  
positive (+) terminal.  
3. Connect the positive (+) lead of a 73 Digital  
Multimeter to the starter motor housing. The  
connection must be clean and free of rust or  
grease. Connect the negative (-) lead to the  
negative (-) battery terminal.  
2005 Mustang, 12/2004  
 
303-06-17  
Starting System  
303-06-17  
DIAGNOSIS AND TESTING (Continued)  
2. Engage the remote starter switch.  
1.  
WARNING: Make sure that the starter  
motor is securely mounted on a bench  
because the starter motor may move or jump  
when it is energized.  
3. The starter motor should eject the starter drive  
and run smoothly. If the starter motor does not  
run smoothly, install a new starter motor.  
Connect a fully charged battery, a Starter,  
Alternator, Battery, Regulator and Electrical  
Tester (SABRE) and a remote starter switch to  
the starter motor. Connect the remote starter  
switch between the battery positive (+) post and  
the starter motor S-terminal. Connect the  
starter motor B-terminal to the battery positive  
(+) post. Connect the SABRE positive (+)  
terminal and negative (-) terminal to the  
corresponding battery post. Make sure that the  
battery and starter motor are grounded.  
4. While the starter motor is running, check the  
voltmeter and ammeter.  
5. The voltage should be greater than 11.0 volts  
and the amperage should be no more than 70  
amps.  
6. If the voltage is lower than the 11.0 volts, or  
the amperage is higher than 70 amps, install a  
new starter motor.  
2005 Mustang, 12/2004  
 

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