DTC B3622. Chevrolet Cruze (SGM) 2009

For 1990-2009 cars

### 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 High Voltage

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
12 Volt Reference | B1529 03 | 1 | -- | B1529 05
Steering Wheel Control Switch Signal | 1 | 1 | B3622 07 | --
1. Steering Wheel Controls Inoperative

### Circuit/System Description

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 V and 16 V.

• | The ignition is ON.

### Conditions for Setting the DTC

The BCM detects a short to voltage 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

#### Schematic Reference

Steering Wheel Secondary/Configurable Control Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Steering Wheel Controls Description and Operation

#### 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 Testing

1. Ignition OFF, disconnect the X1 harness connector at the X85 Inflatable Restraint Steering Wheel Module Coil.
2. Ignition ON, test for greater than 11 V between the voltage reference circuit terminal 5 (X1) 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 K9 Body Control Module (BCM).

3. Test for greater than 11 V between the voltage reference circuit terminal 5 (X1) and the signal circuit terminal 4 (X1).

⇒ | 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 K9 Body Control Module (BCM).

4. Ignition OFF, disconnect the X1 harness connector at the K9 Body Control Module (BCM).
5. Test for infinite resistance between the signal circuit terminal 4 (X1) at the X85 Inflatable Restraint Steering Wheel Module Coil and ground.

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

6. If all circuits test normal, test or replace the S70R Steering Wheel Control Switch - Right.

### Component Testing

#### Static Test

1. Disconnect the harness connector at the X85 Inflatable Restraint Steering Wheel Module Coil.
2. Test the resistance between the terminals 4 (X1) and 5 (X1) of the X85 Inflatable Restraint Steering Wheel Module Coil.

⇒ | If any of the resistance measurements for the individual switches are not within the specified resistance values, replace the S70R Steering Wheel Control Switch - Right.

Function Switch | Minimum Resistance Value | Maximum Resistance Value
--- | --- | ---
Volume Down | 1.0 kΩ | 1.4 kΩ
Volume Up | 1.3 kΩ | 1.7 kΩ
Seek Down | 1.7 kΩ | 2.1 kΩ
Seek Up | 2.2 kΩ | 2.6 kΩ
Source | 2.8 kΩ | 3.2 kΩ
Phone / Push to Talk | 3.6 kΩ | 4.0 kΩ
Hang Up / Audio Mute | 5.1 kΩ | 5.5 kΩ
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