(Table 88, contd)
Troubleshooting Test Steps
Values
Results
6. Check the Wiring Between the Start Relay and the ECM for
a Short Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect the start relay connector. Disconnect the P1 con-
nector from the ECM.
C. Use a multimeter to measure the resistance between the follow-
ing points:
·
P1:53 and all other terminals on the P1 connector
·
P1:27 and all other terminals on the P1 connector
Greater than 1 k Ohm
Result:
Each resistance measurement is greater
than 1 k Ohm.
Contact the Dealer Solution Network (DSN).
Result:
At least one of the resistance measure-
ments is less than 1 k Ohm.
There is a short in the wiring between the start re-
lay connector and the P1 connector.
Check all wiring between the start relay connector
and the P1 connector. Refer to the Electrical
Schematic for the application.
Replace the faulty wiring.
Use the electronic service tool to clear all logged
diagnostic codes and verify that the repair elimi-
nates the fault.
7. Check the Start Signal Wire
A. Turn the keyswitch to the OFF position.
B. Disconnect the P1 connector from the engine ECM.
C. Use a suitable voltmeter to measure between P1:8 and ground.
D. With the keyswitch held in the START position, note the voltage
on the voltmeter.
E. Turn the keyswitch to the OFF position.
F. Reconnect the P1 connector to the engine ECM.
10 V to 14 V
Result:
The measured voltage is less than 10 V.
The fault is in the start signal wiring.
Check all of the start signal wiring between the
ignition keyswitch and the ECM. Refer to the Elec-
trical Schematic for the application.
Replace the faulty wiring.
Use the electronic service tool to clear all logged
diagnostic codes and verify that the repair elimi-
nates the fault.
Result:
The measured voltage is within the ex-
pected range.
Proceed to Test Step 8.
8. Check the Wiring Between the Batteries and the Starting
Motor
A. Use a voltmeter to check the voltage between the ter-
minal on the starting motor and a suitable ground on the engine.
The voltmeter must read battery voltage. If the reading is less than
battery voltage, there is a fault in the wiring between the battery
positive terminal and the starting motor.
B. Use a voltmeter to check the voltage between the ter-
minal and the ground terminal on the starting motor. The voltmeter
must read battery voltage. If the reading is less than battery volt-
age, there is a fault in the wiring between the battery negative ter-
minal and the starting motor.
10 V to 14 V
Result:
All voltage readings are OK
Replace the starting motor. Refer to Disassembly
and Assembly, “Electric Starting Motor - Remove
and Install”.
Result:
At least one of the measured voltages is
not within the expected range.
The fault is in the wiring between the batteries
and the starting motor.
Check all wiring between the batteries and the
starting motor. Refer to the Electrical Schematic
for the application.
Replace the faulty wiring.
Use the electronic service tool to clear all logged
diagnostic codes and verify that the repair elimi-
nates the fault.
(continued)
178
UENR0612
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