• | 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 | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
---|---|---|---|---|---|
B+ Voltage Reference | 1 | B3794 08, B3794 6 | 1 | 1 | B3794 08, B3794 61 |
Cruise Control Switch Signal | 1 | B3794 08, B3794 6 | 1 | B3794 08 | B3794 08, B3794 61 |
Cruise Control Indicator Low Reference | -- | 2 | 2 | 2 | -- |
1. Cruise Control Malfunction 2. Cruise Control Switch Indicator Malfunction |
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. The body control module (BCM) provides the ground path for the LED through a dedicated LED control circuit. Pressing the switch again opens the switch and the lamp turns OFF.
Cruise Control Description and Operation
• | Circuit Testing |
• | Wiring Repairs |
Control Module References for scan tool information
Ignition ON, observe the cruise control indicator while applying the cruise on/off switch. The indicator should turn on and off accordingly with the applied switch.
Important: Refer to DTC B3794 before performing this diagnostic, if this code is set as current or history.
⇒ | If the test lamp does not illuminate, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup, and programming |