TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Disconnect the Ambient/Battery Temperature Sensor harness connector.
Disconnect the PCM harness connectors.
Measure the resistance between the Amb/Batt Temp Sensor Signal circuit and Sensor
Ground circuit.
Is the resistance above 100 kohms?
All
Yes
→
Go To
5
No
→
Repair the Ambient/Battery Temperature Sensor Signal and
Sensor Ground circuits for a short together.
Perform CHARGING VERIFICATION - VER-3.
5
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.
6
WARNING: KEEP CLEAR OF THE ENGINE’S MOVING PARTS.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→
Repair as necessary
Perform CHARGING VERIFICATION - VER-3.
No
→
Test Complete.
16
CHARGING
P1493-AMBIENT/BATT TEMP SEN VOLTS TOO LOW - DIESEL —
Continued