• | 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+ | 1 | B3794 08 | 1 | 1 | B3794 08, B3794 61 |
Cruise Control Switch Signal | 1 | B3794 08 | 1 | B3794 08 | B3794 08, B3794 61 |
Cruise Control Indicator Low Reference | -- | 2 | 2 | B0835 00 | -- |
1. Cruise Control Malfunction 2. Cruise Control Switch Indicator disabled |
The body control module (BCM) supplies battery voltage to the cruise control switch. The cruise control switch signal is an input to the BCM. The BCM monitors 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.
Cruise Control Description and Operation
Control Module References for scan tool information
Engine ON, while rotating the steering wheel to both steering stops, observe the scan tool Cruise Control Switch parameter while pressing each of the cruise control switches. The parameter should toggle between On, Off, Resume, Set, and Cancel as the applicable switch is pressed.
⇒ | If less than the specified value, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the 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 BCM. |
⇒ | If less than the specified value, test the signal circuit for a short to ground. |
⇒ | If not within the specified resistance range, replace the steering wheel controls switch - left. |
Function Switch | Minimum Resistance Value | Maximum Resistance Value |
---|---|---|
Off | O.L. | O.L. |
On | 6.6k Ohms | 7.0k Ohms |
- SET | 2.1k Ohms | 2.5k Ohms |
+ RES | 3.6k Ohms | 4.0k Ohms |
Cancel | 1.3k Ohms | 1.7k Ohms |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup, and programming |