TEST
ACTION
APPLICABILITY
3
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.
4
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Message Center harness connector.
Measure the resistance between ground and the Glow Plug Lamp Control circuit.
Is the resistance above 100 kohms?
All
Yes
→
Go To
5
No
→
Repair the Glow Plug Lamp Control circuit for a short to ground.
Perform ROAD TEST VERIFICATION - VER-2.
5
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Message Center harness connector.
Measure the resistance of the Glow Plug Lamp Control circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
Go To
6
No
→
Repair the Glow Plug Lamp Control circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
6
NOTE: Ensure the Message Center harness connector is connected.
Turn the ignition off.
Disconnect the ECM harness connectors.
Turn the ignition on.
Connect a jumper wire between ground and the Glow Plug Lamp Control circuit in
ECM harness connector C1.
Did the Glow Plug Lamp illuminate?
All
Yes
→
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Go To
7
144
DRIVEABILITY - DIESEL
P1645-GLOW DISPLAY SHORT CIRCUIT —
Continued