Diagnostic Routine A

Diagnostic Routine A

Diagnostic Overview

The Forward Collision Warning System Is Inoperative

Refer to Wiring Diagram Set 136 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

REFER to Collision Avoidance Operation .

Pinpoint Test

1. CHECK THE DTCs (Diagnostic Trouble Codes) FROM THE CONTINUOUS AND ON-DEMAND HUD (Head Up Display) MODULE SELF-TESTS

1. Using a scan tool, perform the HUD (Head Up Display) module self-test.

Are any HUD (Head Up Display) module DTCs (Diagnostic Trouble Codes) recorded?








2. CHECK THE C-CM (Cruise-Control Module) DTCs (Diagnostic Trouble Codes)

1. Using a scan tool, perform the C-CM (Cruise-Control Module) self-test.

Are any C-CM (Cruise-Control Module) DTCs (Diagnostic Trouble Codes) recorded?








3. CHECK THE MESSAGE CENTER FOR CORRECT OPERATION

1. Check the IPC (Instrument Panel Cluster) message center for correct operation.

Does the message center operate correctly?








4. CHECK THE HUD (Head Up Display) MODULE VOLTAGE SUPPLY

1. Ignition OFF.

2. Disconnect: HUD (Head Up Display) Module.

3. Ignition ON.

4. Measure:





Are the voltages greater than 11 volts?








5. CHECK THE HUD (Head Up Display) MODULE GROUND CIRCUIT

1. Measure:





Is the voltage greater than 11 volts?








6. CHECK FOR CORRECT HUD (Head Up Display) MODULE OPERATION

1. Disconnect and inspect the HUD (Head Up Display) module connector.

2. Repair:

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

3. Reconnect the HUD (Head Up Display) module connector. Make sure it seats and latches correctly.

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

Is the concern still present?