DTC B3794. Pontiac G6 2007

For 1990-2009 cars only

Makes 🢒 Pontiac 🢒 2007 🢒 G6 🢒 Safety and Security 🢒 Supplemental Inflatable Restraints 🢒 DTC B3794

DTC B3794 3 spoke steering wheel

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 provide an overview of each diagnostic category.

DTC Descriptor

DTC B3794 08: Cruise Control Function Request Circuit Signal Invalid

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Cruise Control Switch Supply Voltage	1	B3794 08	--	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 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.

Conditions for Running the DTC

•	The ignition is ON.

•	The cruise switch 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 0.5 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 conditions for setting the DTC are no longer present.

•	The history DTC clears after 40 malfunction-free warm-up cycles.

Reference Information

Schematic Reference

•	Cruise Control Schematics

•	Body Control System Schematics

•	Steering Wheel Secondary/Configurable Control Schematics

Connector End View Reference

•	Secondary/Configurable Control Connector End Views

•	Data Communication Connector End Views

Description and Operation

Cruise Control Description and Operation

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

•	Scan Tool Data List

•	Scan Tool Data Definitions

Circuit/System Verification

Engine ON, observe the scan tool Cruise Control Switch parameter in the BCM while pressing the various cruise control switches. The reading should be toggle between On, Off, Resume and Set accordingly with the depressed switches.

Circuit/System Testing

Ignition OFF, remove the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement.
Disconnect the harness connector at the steering wheel controls switch - left.
Ignition ON, measure for 10 volts or greater between the cruise control switch supply voltage circuit terminal 4 and ground.

⇒	If less than the specified value, test the cruise control switch supply voltage circuit for a short to ground or an open/high resistance.

Ignition OFF, disconnect the harness connector C2 at the BCM.
Ignition OFF, test for less than 1.0 ohm of resistance between the steering wheel controls switch - left terminal 5 and the BCM C2 terminal 61.

⇒	If greater than the specified range, test the cruise control switch signal circuit for an open/high resistance.

Ignition OFF, test for infinite resistance between the BCM C2 terminal 61 and ground.

⇒	If less than the specified value, test the cruise control switch signal circuit for a short to ground.

Connect the harness connector C2 at the BCM.
Ignition ON, verify that a test lamp does not illuminate between the cruise control switch signal circuit terminal 5 and ground.

⇒	If the test lamp illuminates, test the cruise control switch signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.

Test the component. If the circuits and the component tests are normal, replace the BCM.

Component Testing

Important: The cruise control ON/OFF switch must be ON in order to properly measure the resistance of the ON, SET - , and the RES + switches.

Steering Wheel Controls - Left

Ignition OFF, remove the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement .
Ignition OFF, disconnect the harness connector at the steering wheel controls - left.
Measure the resistance between terminals 4 and 5 (4 and 6 for the Cancel Switch) 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 - , the RES +, and the Cancel switches.

⇒	If any of the resistance measurements for the OFF, ON, - SET, + RES, and Cancel switches are not within the listed resistance values, replace the steering wheel controls - left switch assembly.

Function Switch	Minimum Resistance Value	Maximum Resistance Value
OFF	O.L.	O.L.
ON	8.1k ohms	8.4k ohms
SET -	1.2k ohms	1.4k ohms
RES +	2.8k ohms	3.0k ohms
Cancel	0.0k ohms	0.3k ohms

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Steering Wheel Control Switch Assembly Replacement

•	Control Module References for BCM replacement, setup, and programming

DTC B3794 4 spoke steering wheel