Cruise Control Indicator Malfunction IPC Indicator 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. |
Circuit/System Description
The instrument panel cluster (IPC) illuminates the cruise control engaged indicator based on serial data messages received from the engine control module (ECM). The indicator is commanded ON when the cruise control system is controlling vehicle speed, and turned OFF with the system disengaged.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, with a scan tool perform the Lamp Test for the instrument panel cluster (IPC) and observe the cruise control indicator.
| ⇒ | If the cruise control indicator illuminates during the test, replace the ECM. |
| ⇒ | If the cruise control indicator does not illuminates during the test or remains illuminated at all times, replace the IPC. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for ECM or IPC replacement, setup, and programming
Cruise Control Indicator Malfunction Switch Indicator 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 | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Ignition Voltage | 1 | 1 | -- | -- |
Cruise Control Indicator Ground | -- | 1 | -- | -- |
1. Cruise Control Malfunction | ||||
Circuit/System Description
The cruise control switch contains an LED that illuminates to indicate the cruise control system has been switched ON. Voltage is applied through the ON/OFF switch to the LED when the switch is pressed. Pressing the switch again opens the switch and the lamp turns OFF.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool Cruise ON/OFF Switch parameter. Verify the parameter changes each time the switch is pressed.
| ⇒ | If the parameter does not change, refer to Cruise Control Malfunction. |
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the steering wheel control switch-left.
- Ignition ON, test for B+ between the ignition voltage circuit terminal 1 and ground.
- Ignition OFF, test for less than 10 ohms between the ground circuit terminal 8 and ground.
- If all circuits test normal, test or replace the steering wheel control switch-left.
| ⇒ | If less than the specified value, test the ignition voltage circuit for a short to ground or an open/high resistance. |
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
