No Response From AHBM (Smartbeam)

*NO RESPONSE FROM AHBM (SMARTBEAM)





For a complete wiring diagram consult Diagrams/Electrical.








Diagnostic Test


1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.

With the scan tool, select ECU view.

NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.

Does the scan tool display a red X next to the module?

Yes


- Go To 2


No


- The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.




2. (F23) IGNITION RUN-START OUTPUT CIRCUIT OPEN OR SHORTED




Turn the ignition off.

NOTE: Check the TIPM for any ignition related DTCs. If set, perform the appropriate DTC before proceeding.

Disconnect the Inside Rearview Mirror harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the (F23) Ignition Run-Start Output circuit.
Does the test light illuminate brightly?

Yes


- Go To 3


No


- Repair the (F23) Ignition Run-Start Output circuit for an open or short.
- Perform the BODY VERIFICATION TEST - VER 1.Body Verification Test.




3. (Z909) GROUND CIRCUIT OPEN




Using a 12-volt test light connected to 12-volts, check the (Z909) ground circuit.
Does the test light illuminate brightly?

Yes


- Go To 4


No


- Repair the (Z909) ground circuit for an open.
- Perform the BODY VERIFICATION TEST - VER 1.Body Verification Test.




4. (D55) AND (D54) CAN B BUS CIRCUITS OPEN





NOTE: One open circuit will not cause this condition.

Measure the voltage between the (D54) CAN B Bus (-) circuit and ground.
Measure the voltage between the (D55) CAN B Bus (+) circuit and ground.
Is there any voltage present on either circuit?

Yes


- Replace and program/calibrate the Inside Rearview Mirror (for smartbeam functions).
- Perform the BODY VERIFICATION TEST - VER 1.Body Verification Test.


No


- Repair the (D55) and (D54) CAN B Bus circuits for an open. Inspect the connector for damage.
- Perform the BODY VERIFICATION TEST - VER 1.Body Verification Test.