No Response From LRSM (Light/Rain Sensor Module)

NO RESPONSE FROM LRSM (RAIN SENSOR)





For a complete wiring diagram, refer to the Wiring Information.






1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.

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

2. 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. (A934) FUSED RUN/ACCESSORY RELAY OUTPUT CIRCUIT OPEN OR SHORTED





NOTE: Check the FCM for any ignition related DTCs before proceeding. If set Testing and Inspection .

1. Turn the ignition off.
2. Disconnect the Rain Sensor harness connector.
3. Turn the ignition on.
4. Using a 12-volt test light connected to ground, check the (A934) Fused Run/Accessory Relay Output circuit.

Does the test light illuminate brightly?

Yes

- Go To 3

No

- Repair the (A934) Fused Run/Accessory Relay Output circuit for an open or short.
- Perform the BODY VERIFICATION TEST Body Verification Test

3. (Z915) GROUND CIRCUIT OPEN




1. Turn the ignition off.
2. Using a 12-volt test light connected to 12-volts, check the (Z915) ground circuit.

Does the test light illuminate brightly?

Yes

- Go To 4

No

- Repair the (Z915) ground circuit for an open.
- Perform the BODY VERIFICATION TEST Body Verification Test

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





NOTE: One open circuit will not cause this condition.

1. Measure the voltage between the (D54) CAN B Bus (-) circuit and ground.
2. Measure the voltage between the (D55) CAN B Bus (+) circuit and ground.

Is there any voltage present on either circuit?

Yes

- Replace the Rain Sensor.
- Perform the BODY VERIFICATION TEST 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 Body Verification Test