B221D

B221D-RAIN SENSOR MODULE (RSM) INTERNAL







- When Monitored:
With the ignition on.

- Set Condition:
The Rain Sensing Module detects an internal failure or the (D508) LIN Bus circuit is shorted.





1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, erase the DTCs.
3. Cycle the ignition from on to off three times.
4. Turn the ignition on and wait 30 seconds.
5. With the scan tool, read the DTCs.

NOTE: If the D508 LIN Bus circuit is shorted to Ground or Battery voltage, this code will appear as Stored and when erased will return as Stored.

Does the scan tool display: B221D-RAIN SENSOR MODULE (RSM) INTERNAL either Active or Stored?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and poor pin fit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. (D508) LIN BUS CIRCUIT SHORTED TO GROUND




1. Turn the ignition off.
2. Disconnect the Rain Sensor harness connector.
3. Measure the resistance between ground and the (D508) LIN Bus circuit in the rain sensor connector.

Is the resistance below 20,000 Ohms?

Yes

- Go To 4

No

- Go To 3

3. (D508) LIN BUS CIRCUIT SHORT TO BATTERY




1. Turn the ignition on.
2. Measure the voltage between the (D508) LIN Bus circuit and ground.

NOTE: The voltage should fluctuate between approximately 7.0 and 9.8 volts.

Is the voltage above 10.0 volts?

Yes

- Go To 5

No

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

4. (D508) LIN BUS WIRE SHORTED TO GROUND




1. Disconnect the Wireless Ignition Node (WIN) harness connector.
2. Measure the resistance between ground and the (D508) LIN Bus circuit in the rain sensor connector.

Is the resistance below 20,000 Ohms?

Yes

- Repair the (D508) LIN Bus circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Wireless Ignition Node (WIN).
- Perform the WIRELESS IGNITION NODE (WIN) VERIFICATION TEST. Wireless Ignition Node (WIN) Verification Test.

5. (D508) LIN BUS WIRE SHORTED TO BATTERY




1. Turn the ignition off.
2. Disconnect the Wireless Ignition Node (WIN) harness connector.
3. Turn the ignition on.
4. Measure the voltage between the (D508) LIN Bus circuit and ground.

Is there any voltage present?

Yes

- Repair the LIN Bus wire for a short to voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Wireless Ignition Node (WIN).
- Perform the WIRELESS IGNITION NODE (WIN) VERIFICATION TEST. Wireless Ignition Node (WIN) Verification Test.