Grand AM V6-3.4L VIN E (2001)
Intake Air Temperature (IAT) Sensor: All Technical Service Bulletins
Engine Controls - MIL ON/Multiple DTC's Set
File In Section: 06 - Engine/Propulsion System
Bulletin No.: 02-06-03-005
Date: June, 2002
TECHNICAL
Subject:
Service Engine Soon Light With Stored Codes P0112, P0113, P1111 or P1112 (Replace IAT Sensor Connector)
Models:
1997-2002 Chevrolet Malibu
1997-1999 Oldsmobile Cutlass
1999-2002 Oldsmobile Alero
1999-2002 Pontiac Grand Am
with 3.1L or 3.4L Engine (VINs M, J, E - RPOs L82, LG8, LA1)
Condition
Some customers may comment that the service engine soon light is on.
The TECH 2 will show stored diagnostic trouble codes P0112, P0113, P1111, or P1112.
Cause
This condition may be caused by a broken wire at the intake air temperature (IAT) sensor connector. The break may not be readily apparent as the
insulation may be intact.
Correction
If routine diagnosis leads to a broken wire at the IAT sensor connector, replace the connector as follows:
1.
Remove the tape from the engine harness convoluted tube where the IAT circuit wires join the main engine harness.
2.
Locate/isolate the 2 IAT wires within the engine harness.
3.
Disconnect the IAT connector from the IAT sensor.
4.
Remove the tape from the IAT and MAF (mass air flow) sensor wires to allow removal of the IAT wires.
Important:
Before cutting the IAT circuit wires, it will be necessary to determine the proper length. You need to add 38 mm - 50 mm (1.5 in - 2.0 in) to the
length of the wire going to the IAT. Also, when cutting the IAT circuit wires, it is important that the wires are cut in a manner that will not create a
large mass. Stagger the cuts and install the connector kit. Original connector cavity "A" has a red wire and cavity "B" has a tan wire. Make sure
cavity "A" and cavity "B" wires on the replacement pig tail connector match "A" and "B" wires on the engine harness. This will provide strain relief
and prevent recurrence of this concern.
5.
After staggered cuts are made on the IAT wires in the engine harness, strip a small amount of the insulation from both wires and install the kit butt
connectors to the bare IAT wires by crimping both.
6.
Stagger the cuts on the pig tail wires to match the IAT engine harness wires.
7.
Strip a small amount of the insulation from the pig tail IAT wire ends. Install and crimp both wires into the open end of the butt connectors that
were installed on the engine harness IAT wires.
8.
Heat shrink both IAT butt connectors and let the wires cool off.
9.
After cool down is completed, the harness can be neatly taped with electrical tape.
10.
Install the IAT connector on the IAT sensor.
11.
Clear the codes.