PINPOINT TEST T : The HUD Module Does Not Respond To The Scan Tool
- T1 CHECK THE HUD MODULE VOLTAGE SUPPLY CIRCUITS FOR AN OPEN
- Ignition OFF.
- Disconnect: HUD module.
- Ignition ON.
Is the voltage greater than 11 volts?
Yes GO to T2. No VERIFY the BCM fuses 11 (10A) and 35 (5A) are OK. If OK, REPAIR the circuit in question. If not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short. - T2 CHECK THE HUD MODULE GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure:
Positive Lead Measurement / Action Negative Lead C2395-1 Ground
Is the resistance less than 3 ohms?
Yes GO to T3. No REPAIR the circuit. - T3 CHECK THE HS-CAN CIRCUITS BETWEEN THE HUD MODULE AND THE DLC FOR AN OPEN
Are the resistances less than 3 ohms?
Yes CONNECT the negative battery cable. GO to T4. No REPAIR the circuit in question. - T4 CHECK FOR CORRECT HUD MODULE OPERATION
- Ignition OFF.
- Disconnect and inspect the HUD module connector and related in-line connectors.
- Repair:
- corrosion (replace connector or terminals - clean module pins)
- damaged or bent pins - replace terminals/pins
- pushed-out pins - replace pins as necessary
- Reconnect the HUD module connector and related in-line connectors. Make sure they seat and latch correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs address this concern, INSTALL a new HUD module. REFER to Collision Avoidance . No The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.
NOTE:
Failure to disconnect the battery when instructed will result in false resistance readings. REFER to Battery, Mounting and Cables
