Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Cruise Control Switch Supply Voltage | 1 | B3794 08 | 1 | B3794 08 |
Cruise Control Switch Signal | B3794 08 | B3794 08 | 1 | B3794 08 |
1. Cruise Control Inoperative/Malfunctioning |
The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control set/coast and resume/accelerate 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 set/coast and resume/accelerate switch signal circuit when a switch is applied.
• | The cruise switch is ON. |
• | The ignition is ON. |
• | The BCM detects an invalid voltage signal on the cruise control switch signal circuit. |
• | The above condition is present for greater than 1 second. |
• | The BCM stores the DTC information into memory when the diagnostic runs and fails. |
• | The malfunction indicator lamp (MIL) will not illuminate. |
• | The Cruise Control System is disabled. |
• | The DTC becomes history when the fault is no longer present. |
• | A History DTC clears after 100 malfunction-free ignition cycles. |
• | The BCM receives a clear code command from the scan tool. |
• | Rotate the steering wheel to both steering stops and activate each cruise control switch separately. With a scan tool, observe the Cruise Control Switch parameter in the BCM Cruise Control data list. This will help eliminate the possibility of a internally open or shorted inflatable restraint steering wheel module coil. |
• | For an intermittent, refer to Testing for Intermittent Conditions and Poor Connections . |
Cruise Control Connector End Views
⇒ | If the Cruise Control Switch parameter toggles between On, Off, Resume, and Set accordingly with the depressed switches, go to Testing for Intermittent Conditions and Poor Connections . |
Caution: Refer to SIR Caution in the Preface section.
Disable the inflatable restraint steering wheel module when performing this diagnostic. Refer to SIR Disabling and Enabling .
⇒ | If less than the specified value, check for an open/high resistance or a short to ground on the cruise control supply voltage circuit. |
⇒ | If less than the specified value, check for an open/high resistance or a short to ground on the cruise control switch signal circuit between the cruise on/off switch terminal 6 and the cruise control set/cruise, resume accelerate switch terminal 6 (UK3) / terminal 3 (non UK3). If the circuit tests normal, replace the cruise on/off switch assembly. |
Caution: Refer to SIR Caution in the Preface section.
Disable the inflatable restraint steering wheel module when performing this diagnostic. Refer to SIR Disabling and Enabling .
⇒ | If any of the resistance measurements for the - SET, and the + RES switches are not within the listed resistance values, replace the cruise control set/coast, resume/accelerate switch assembly. |
Function Switch | Minimum Resistance Value | Maximum Resistance Value |
---|---|---|
- SET | 1.2k Ohms | 1.3k Ohms |
+ RES | 2.7k Ohms | 3.0k Ohms |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup, and programming |