Diagnostic Routine G

Diagnostic Routine G

Diagnostic Overview

The Steering Column Control Module (SCCM) Does Not Respond To The Scan Tool

Refer to Wiring Diagram Set 14 for schematic and connector information Electrical Diagrams.

Refer to Wiring Diagram Set 31 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

The SCCM (Steering Column Control Module) communicates with the scan tool through the HS-CAN (High Speed Controller Area Network).

Visual Inspection and Diagnostic Pre-checks

Verify BCM (Body Control Module) fuse 23 (15A) is OK.

Pinpoint Test

1. CHECK THE SCCM (Steering Column Control Module) VOLTAGE SUPPLY CIRCUITS FOR AN OPEN

1. Ignition OFF.

2. Disconnect: SCCM (Steering Column Control Module) C2414A.

3. Ignition ON.

4. Measure:





Is the voltage greater than 11 volts?






2. CHECK THE SCCM (Steering Column Control Module) GROUND CIRCUITS FOR AN OPEN

1. Ignition OFF.

2. Measure:





Is the resistance less than 3 ohms?






3. CHECK THE HS-CAN (High Speed Controller Area Network) CIRCUITS BETWEEN THE SCCM (Steering Column Control Module) AND THE DLC (Data Link Connector) FOR AN OPEN

1. Measure:





Are the resistances less than 3 ohms?






4. CHECK FOR CORRECT SCCM (Steering Column Control Module) OPERATION

1. Ignition OFF.

2. Disconnect and inspect the SCCM (Steering Column Control Module) connectors.

3. Repair:

- corrosion (replace connector or terminals- clean module pins)
- damaged or bent pins- replace terminals/pins
- pushed-out pins- replace pins as necessary

4. Reconnect the SCCM (Steering Column Control Module) connectors. Make sure they seat and latch correctly.

5. Operate the system and verify the concern is still present

Is the concern still present?