Jeep XJ. Manual - part 597
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the ECM ECT Sensor harness connector.
Measure the resistance between the ECM ECT Sensor Signal circuit and Sensor
Ground circuit.
Is the resistance above 100 kohms?
All
Yes
→
No
→
Repair the ECM ECT Sensor Signal and Ground circuits for a
short together.
Perform ROAD TEST VERIFICATION - VER-2.
5
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
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 ROAD TEST VERIFICATION - VER-2.
No
→
Test Complete.
40
DRIVEABILITY - DIESEL
P0115-TEMPERATURE OF ENGINE COOLANT SRC LOW EXCEEDED —
Continued