B3794
DTC B3794
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC B3794 08
- Cruise Control Function Request Circuit Signal Invalid
DTC B3794 61
- Cruise Control Function Request Circuit Actuator Stuck
Diagnostic Fault Information
Circuit/System Description
The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel 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, resume/accelerate and cancel switch signal circuit when a switch is applied.
Conditions for Running the DTC
* The cruise switch is ON.
* The ignition is ON.
Conditions for Setting the DTC
* The BCM detects an invalid voltage signal on the cruise control switch signal circuit.
* The above condition is present for greater than 1 second.
Action Taken When the DTC Sets
* 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.
Conditions for Clearing the DTC
* 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.
Diagnostic Aids
* 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 in Diagnostic Aids. Component Tests and General Diagnostics
Circuit/System Verification
Ignition ON, observe the scan tool Cruise Control Switch parameter in the BCM while pressing the various cruise control switches. The reading should be Error.
If the Cruise Control Switch parameter toggles between On, Off, Resume, Set and Cancel accordingly with the depressed switches, go to Testing for Intermittent Conditions and Poor Connections.
Circuit/System Testing
Caution: Refer to Restraint System Service Precautions.
Disable the inflatable restraint steering wheel module when performing this diagnostic. Refer to SIR Disabling and Enabling. Service and Repair
1. Ignition OFF, remove the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement (Equinox) Inflatable Restraint Steering Wheel Module Replacement (Torrent).
2. Disconnect the harness connector at the steering wheel controls switch-left.
3. Ignition ON, measure for 10 volts or greater at the steering wheel control supply voltage circuit.
• If less than the specified value, check for an open/high resistance or a short to ground on the steering wheel control supply voltage circuit.
4. Test the cruise control switch signal circuit for an open/high resistance, a short to ground or a short to voltage.
5. If the circuits test normal, test the component. If the component tests normal, replace the BCM.
Component Testing
Caution: Refer to Restraint System Service Precautions.
Disable the inflatable restraint steering wheel module when performing this diagnostic. Refer to SIR Disabling and Enabling. Service and Repair
1. Ignition OFF, remove the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement (Equinox) Inflatable Restraint Steering Wheel Module Replacement (Torrent).
2. Ignition OFF, disconnect the harness connector C277 at the inflatable restraint steering wheel module.
3. Measure the resistance between terminals C and D at the cruise control switch side of the connector. Individually activate and hold each cruise control function switch and compare the resistance reading to the values for the On, Off, - SET, + RES and cancel switches.
• If any of the resistance measurements for the On, Off, - SET, + RES and cancel switches are not within the listed resistance values, replace the steering wheel controls-left.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests
* Steering Wheel Control Switch Assembly Replacement (Equinox) Steering Wheel Control Switch Assembly Replacement (Torrent)
* Refer to Programming and Relearning for BCM setup and programming. Programming and Relearning