Intermittent Check Engine Light On, Engine Power Reduced Message Displayed in DIC, DTC P2135 Set (Inspect Engine Wiring Harness for Chafing and Recrimp ECM Terminals, if Necessary)
| Subject: | Intermittent Check Engine Light On, Engine Power Reduced Message Displayed in DIC, DTC P2135 Set (Inspect Engine Wiring Harness for Chafing and Recrimp ECM Terminals, if Necessary) |
| Models: | 2006-2008 Chevrolet HHR |
| with 2.2L or 2.4L Engine (VINs D, P -- RPOs L61, LE5) |
This bulletin is being revised to provide the tool number for the crimp tool that is required. Please discard Corporate Bulletin Number 08-06-04-022 (Section 06 -- Engine/Propulsion System).
Condition
Some customers may comment that the check engine light is on and an engine reduced power message is displayed in the DIC.
A scan tool may reveal DTC P2135 set as current or in history.
Cause
This condition may be due to poor terminal crimps within the ECM connector, resulting in resistance at the affected circuits.
Correction
Perform the following as necessary.
- Inspect the engine wiring harness for potential shorts to ground in the following locations and repair and reposition the circuits/harness as necessary:
- If after inspection of the engine wiring harness reveals no chafing in the areas identified above, follow SI procedures to recrimp the terminals listed below. These terminals are located in the ECM connectors. Use release tool J 38125-213 and J 38125-641 crimp tool (H jaw). Install each terminal back into the correct connector cavity and re-evaluate the concern. For additional information refer to the Engine Data Sensors -- APP and TAC schematics and the Engine Control Module Connector End Views.
| • | on the ECM/PCM case and/or on the edge of either ECM/PCM connector body |
| • | at the UBEC bracket |
| • | at the cylinder head plate (power steering pump blockout) |
| • | at the EVAP purge valve bracket |
| • | at the rear of the cylinder head/upper edge of transmission bell housing |
ECM Connector | Function | Pin | Circuit No. |
|---|---|---|---|
C2 | Throttle Position Sensor 1 Signal | 58 | 485 |
C2 | Throttle Position Sensor 2 Signal | 36 | 486 |
C2 | Low Reference | 29 | 1704 |
C2 | Low Reference | 31 | 2752 |
C2 | 5 Volt Reference | 24 | 2701 |
C2 | 5 Volt Reference | 26 | 1688 |
ECM Connector | Function | Pin | Circuit No. |
|---|---|---|---|
C2 (2007) or X2 (2008) | Throttle Position Sensor 1 Signal | 57 | 485 |
C2 (2007) or X2 (2008) | Throttle Position Sensor 2 Signal | 59 | 486 |
C2 (2007) or X2 (2008) | Low Reference | 40 | 2752 |
C2 (2007) or X2 (2008) | 5 Volt Reference | 53 | 2701 |
ECM Connector | Function | Pin | Circuit No. |
|---|---|---|---|
C2 | Throttle Position Sensor 1 Signal | 64 | 485 |
C2 | Throttle Position Sensor 2 Signal | 66 | 486 |
C3 | Low Reference | 28 | 1704 |
C2 | Low Reference | 29 | 2752 |
C2 | 5 Volt Reference | 44 | 2701 |
C3 | 5 Volt Reference | 44 | 1688 |
ECM Connector | Function | Pin | Circuit No. |
|---|---|---|---|
X2 | Throttle Position Sensor 1 Signal | 57 | 485 |
X2 | Throttle Position Sensor 2 Signal | 59 | 486 |
X2 | Low Reference | 40 | 2752 |
X2 | 5 Volt Reference | 53 | 2701 |
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
J7720* | Inspect Engine Wiring Harness for Chafing | 0.3 hr |
Add | To Recrimp ECM Terminals | 0.5 hr |
* This labor operation number is for bulletin use only. This number will not be published in the Labor Time Guide. | ||
