DTC B3622. Chevrolet Equinox 2009

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2009 🢒 Equinox 🢒 DTC 🢒 DTC B3622

DTC B3622 Equinox

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 provides an overview of each diagnostic category.

DTC Descriptor

DTC B3622 07: Steering Wheel Controls Signal Circuit

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+ Voltage Reference	B1529 03	1	--	B1529 07
Right Steering Wheel Control Switch Signal	1	1	B3622 07	--
1. Steering Wheel Controls Inoperative

The body control module (BCM) monitors the steering wheel control signal circuit voltage. If the voltage level is too high, damage may result in the system. When a high voltage condition is detected, the BCM will ignore the switch command.

Conditions for Running the DTC

•	Battery voltage is between 9-16 volts.

•	The ignition is ON.

Conditions for Setting the DTC

The BCM detects a short to ground in the steering wheel control switch signal circuit.

Action Taken When the DTC Sets

The BCM will ignore switch inputs.

Conditions for Clearing the DTC

•	The condition responsible for setting the DTC no longer exists.

•	A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool SWC Bank 1 status while pressing and releasing the switches. The reading should be SW1-SW7 identifying the switch pressed, and Idle when released.

Circuit/System Testing

Ignition OFF, disconnect the harness connector at the right steering wheel control switch.
Ignition ON, test for B+ between the voltage reference circuit terminal 3 and ground.

⇒	If less than the specified value, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.

Test for B+ between the voltage reference circuit terminal 3 and the signal circuit terminal 4.

⇒	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.

Ignition OFF, disconnect the X1 harness connector at the BCM.
Test for infinite resistance between the signal circuit terminal 4 and ground.

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

If all circuits test normal, test or replace the right steering wheel control switch.

Component Testing

Disconnect the harness connector at the right steering wheel control switch.
Connect a DMM between terminals 3 and 4 of the right steering wheel control switch.

⇒	If any of the resistance measurements for the individual switches are not within the specified resistance values, replace the right steering wheel control switch.

Function Switch	Minimum Resistance Value	Maximum Resistance Value
Mute/Voice Recognition	1.0k Ohms	1.4k Ohms
Volume Down	1.3k Ohms	1.7k Ohms
Volume Up	1.7k Ohms	2.1k Ohms
Previous	2.2k Ohms	2.6k Ohms
Next	2.8k Ohms	3.2k Ohms
Source	3.6k Ohms	4.0k Ohms
Seek	5.1k Ohms	5.5k Ohms
No Switch Pressed	O.L.	O.L.

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 B3622 Torrent