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 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. The body control module (BCM) monitors the cruise control indicator switch.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Cruise Control 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 Control 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 X1 harness connector at the X85 inflatable restraint steering wheel module coil.
- Ignition OFF, test for less than 10 Ω between the ground circuit terminal 2 and ground.
- Ignition OFF, disconnect the X3 harness connector at the X85 inflatable restraint steering wheel module coil.
- Ignition ON, test for B+ between the B+ circuit terminal 5 and ground.
- Test for B+ between the B+ circuit terminal 5 and the signal circuit terminal 3.
- Ignition OFF, disconnect the X3 harness connector at the K9 BCM.
- Test for infinite resistance between the signal circuit terminal 9 and ground.
- If all circuits test normal, test or replace the S70L steering wheel control switch-left.
| ⇒ | If greater than the specified value, test the ground circuit for an open/high resistance. |
| ⇒ | If less than the specified value, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM. |
| ⇒ | If less than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM. |
| ⇒ | If less than the specified value, test the signal circuit for a short to ground. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
