Cruise Control Malfunction
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Diagnostic Fault Information
| Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
|---|
| B+ | 1 | B3794 08 | 1 | 1 | B3794 08 |
| Cruise Control Switch Signal | 1 | B3794 08 | 1 | B3794 08 | B3794 08 |
| Ground | -- | 1 | 1 | -- | -- |
| 1. Cruise Control Malfunction |
Circuit/system Description
The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The BCM sends a serial data message to the engine control module (ECM) indicating the status of the cruise control switches.
Reference Information
Schematic Reference
Cruise Control Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Cruise Control Description and Operation
Electrical Information Reference (Except Opel Gt)
| • | Testing for Intermittent Conditions and Poor Connections |
Scan Tool Reference
Control Module References for scan tool information
Circuit/system Testing
- Ignition OFF, disconnect the harness connector at the steering wheel controls switch - left.
- Ignition OFF, test for less than 10 ohms between the ground circuit terminal 7 and ground.
- Ignition ON, test for B+ between the B+ circuit terminal 4 and ground.
- Ignition ON, test for B+ between the circuit terminal 4 and the signal circuit terminal 5.
- Ignition OFF, disconnect the X2 harness connector at the BCM.
- Test for infinite resistance between the signal circuit terminal 61 and ground.
- If all circuits test normal, test or replace the steering wheel control switch-left.
Component Testing
- Disconnect the harness connector at the steering wheel control switch-left.
- Cruise control switch ON, measure the resistance between terminal 4 and terminal 5 while individually activation and holding each cruise control function switch and compare the resistance reading to the values in the table below.
| Function Switch | Minimum Resistance Value | Maximum Resistance Value |
|---|
| Off | O.L. | O.L. |
| On | 8.1k Ohms | 8.4k Ohms |
| - SET | 1.2k Ohms | 1.4k Ohms |
| + RES | 2.8k Ohms | 3.0k Ohms |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Steering Wheel Control Switch Assembly Replacement |
| • | Control Module References for BCM replacement, setup, and programming |
