Ascender 4WD L6-4.2L (2003)

Wiring Harness: Customer Interest
Electrical - MIL ON/DTC's P0480/P0526/P1481 Set
TSB SB06-04-S004
Malfunction Indicator Lamp (MIL) Or Check Engine Light On, DTC P0480, P0526, P1481 Set
(This Bulletin Supersedes SB06-04-S001)
ISSUE DATE: MAY 2006
Affected Vehicles:
2003-2006 Isuzu Ascender (US/UT)
Service Information
This bulletin is being updated to add the 2006 model year and to add additional service information.
Condition:
Some customers may comment that the Malfunction Indicator Lamp (MIL) or Check Engine light is illuminated. This condition may be intermittent and
upon investigation, the technician may find DTC P0480, P0526, P1481 set.
Possible Cause:
This condition may be caused by the cooling fan harness chaffing against the plastic guide it routes through. This contact may damage the insulation of
the wires enclosed in that harness.
Correction:
Replace the engine cooling fan harness using the procedure listed below.
Service Procedure
Replace the engine cooling fan harness using the procedure listed below.
1.
Remove the cooling fan. Refer to the Cooling Fan and Shroud Replacement procedure in the Engine Cooling sub-section of the Service Manual.
2.
Place the cooling fan assembly on a bench.
3.
Disconnect the harness electrical connector from the cooling fan clutch.
4.
Remove the harness from the plastic guide while feeding the wires out of the slot.
5.
Before installing the new harness, wrap the affected area on the wires with electrical tape to keep the protective sleeve in place. Be sure to keep the
tape approximately 25 mm (1 in) away from the connector so the wires can be fed into the slot.
6.
Feed the wires into the slot and install the harness to the plastic guide.
7.
Connect the harness electrical connector to the cooling fan clutch.
8.
Install the cooling fan. Refer to the Cooling Fan and Shroud Replacement procedure in the Engine Cooling sub-section of the Service Manual.