Diagnostic Routine E

Diagnostic Routine E

Diagnostic Overview

The High Beams Are On Continuously

Refer to Wiring Diagram Set 85 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

REFER to High Beams .

Visual Inspection and Diagnostic Pre-checks

- Inspect the multifunction switch for damage.

Pinpoint Test

1. MONITOR THE BCM (Body Control Module) HIGH BEAM PID (Parameter Identification)

1. Ignition ON.

2. Using a scan tool, view BCM (Body Control Module) PIDs (Parameter Identifications).

3. Monitor the BCM (Body Control Module) HIGH BEAMS PID (Parameter Identification).

Does the PID (Parameter Identification) indicate that the high beams are on?







2. CHECK THE HIGH BEAM SUPPLY CIRCUITS FOR A SHORT TO VOLTAGE

1. Ignition OFF.

2. Disconnect BCM (Body Control Module) C2280D.

3. Ignition ON.

Does either high beam continue to illuminate?







3. CHECK THE MULTIFUNCTION SWITCH

1. Ignition OFF.

2. Install a new multifunction switch.

3. Ignition ON.

Do the high beams continue to illuminate?







4. CHECK FOR CORRECT SASM (Steering Angle Sensor Module) OPERATION

1. Disconnect and inspect all SASM (Steering Angle Sensor Module) connectors.

2. Repair:

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

3. Reconnect the SASM (Steering Angle Sensor Module) connectors. Make sure they seat and latch correctly.

4. Operate the system and determine if the concern is still present.

Is the concern still present?







5. CHECK FOR CORRECT BCM (Body Control Module) OPERATION

1. Disconnect and inspect all BCM (Body Control Module) connectors.

2. Repair:

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

3. Reconnect the BCM (Body Control Module) connectors and make sure they seat and latch correctly.

4. Operate the system and determine if the concern is still present.

Is the concern still present?