RKE FOB 3 Performance - FOBIK Transmitter

B221D - Rain Sensor Module (RSM) Internal






For a complete wiring diagram, refer to.

• When Monitored: With the ignition on.

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






Test Step 1 - TEST FOR INTERMITTENT CONDITION

• Turn the ignition on.

• With the scan tool, erase the DTCs.

• Cycle the ignition from on to off three times.

• Turn the ignition on and wait 30 seconds.

• With the scan tool, read the DTCs.

• 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 Test Step 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. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 2 - (D508) LIN BUS CIRCUIT SHORTED TO GROUND







• Turn the ignition off.

• Disconnect the Rain Sensor harness connector.

• 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 Test Step 4

No

• Go to Test Step 3

Test Step 3 - (D508) LIN BUS CIRCUIT SHORT TO BATTERY







• Turn the ignition on.

• Measure the voltage between the (D508) LIN Bus circuit and ground.

• The voltage should fluctuate between approximately 7.0 and 9.8 volts.

Is the voltage above 10.0 volts?

Yes

• Go to Test Step 5

No

• Replace the Rain Sensor.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 4 - (D508) LIN BUS WIRE SHORTED TO GROUND







• Disconnect the Wireless Ignition Node (WIN) harness connector.

• 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. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Replace the Wireless Ignition Node (WIN).

• Perform the WIN Verification Test. Refer to => Non-DTC Based Diagnostics. Wireless Ignition Node Verification Test

Test Step 5 - (D508) LIN BUS WIRE SHORTED TO BATTERY







• Turn the ignition off.

• Disconnect the Wireless Ignition Node (WIN) harness connector.

• Turn the ignition on.

• 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. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Replace the Wireless Ignition Node (WIN).

• Perform the WIN Verification Test. Refer to => Non-DTC Based Diagnostics. Wireless Ignition Node Verification Test