TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the Ambient/Battery Temperature Sensor harness connector.
Disconnect the PCM harness connectors.
Remove the ASD/Diesel Power Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ASD/Diesel Power
Relay connector.
Turn the ignition on.
Measure the voltage between ground and the Amb/Batt Temp Sensor Signal circuit.
Is the voltage below 0.5 volt?
All
Yes
→
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform CHARGING VERIFICATION - VER-3.
No
→
Repair the Ambient/Battery Temperature Sensor Signal circuit
for a short to voltage.
Perform CHARGING VERIFICATION - VER-3.
4
Turn the ignition off.
Disconnect the Ambient/Battery Temperature Sensor harness connector.
Measure the resistance of the Amb/Batt Temp Sensor.
Is the resistance above 100 kohms?
All
Yes
→
Replace the Ambient/Battery Temperature Sensor.
Perform CHARGING VERIFICATION - VER-3.
No
→
Go To
5
5
Turn the ignition off.
Disconnect the Ambient/Battery Temperature Sensor harness connector.
Disconnect the PCM harness connectors.
Measure the resistance of the Amb/Batt Temp Sensor Signal circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
Go To
6
No
→
Repair the Ambient/Battery Temperature Sensor Signal circuit
for an open.
Perform CHARGING VERIFICATION - VER-3.
6
Turn the ignition off.
Disconnect the Ambient/Battery Temperature Sensor harness connector.
Disconnect the PCM harness connectors.
Measure the resistance of the Amb/Batt Temp Sensor Ground circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
Go To
7
No
→
Repair the Ambient/Battery Temperature Sensor Ground circuit
for an open.
Perform CHARGING VERIFICATION - VER-3.
7
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform CHARGING VERIFICATION - VER-3.
25
CHARGING
P1492-AMBIENT/BATT TEMP SEN VOLTS TOO HIGH - DIESEL —
Continued