U103C

U103C-00-KIN COMMUNICATION





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

- When Monitored:
Any time the module is awake.

- Set Condition:
Whenever the Radio Frequency Hub (RF Hub) senses an open, or a short to ground on the (D122) Security K Line Communication circuit, this code will set.





1. TEST FOR INTERMITTENT CONDITION

NOTE: Be sure the battery is fully charged before continuing.

1. Turn the ignition on.
2. Using the scan tool, record and erase the DTCs.
3. Try to start the engine.
4. With the scan tool, read the Active DTCs and wait one minute.

Does the scan tool display: U103C-00-KIN COMMUNICATION as active?

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 correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. (A910) FUSED B+ OR (Z910) GROUND CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Keyless Ignition Node harness connector.
3. Connect a 12 volt test light between the (A910) Fused B+ circuit and the (Z910) Ground circuit.

Does the test light illuminate brightly? Compare the brightness to that of a direct connection to the battery.

Yes

- Go To 3

No

- Test the (A910) Fused B+ and (Z910) Ground circuits to determine where the high resistance is. Repair the high resisted circuit as necessary.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. (D122) SECURITY K LINE COMMUNICATION CIRCUIT OPEN




1. Measure the voltage between ground and the (D122) Security K Line Communication circuit.

Is the voltage above 12.0 volts?

Yes

- Replace the Keyless Ignition Node (KIN). Keyless Ignition Node Receiver - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. (D122) SECURITY K LINE COMMUNICATION WIRE OPEN




1. Disconnect the Radio Frequency Hub C1 harness connector.
2. Measure the resistance of the (D122) Security K Line Communication wire between the Keyless Ignition Node harness connector and the RF Hub C1 harness connector.

Is the resistance below 2.0 Ohms?

Yes

- Go To 5

No

- Repair the open in the (D122) Security K Line Communication wire.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

5. (D122) SECURITY K LINE COMMUNICATION SHORT TO GROUND




1. Measure the resistance between ground and the (D122) Security K Line Communication circuit in the Keyless Ignition Node harness connector.

Is the resistance below 30K Ohms?

Yes

- Repair the short to ground in the (D122) Security K Line Communication circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Radio Frequency Hub (RF Hub) Module. Radio Frequency Module (RF Hub) - Removal.
- NOTE: If this vehicle is equipped with a Steering Wheel Lock Module (Export) it will have to be replaced also.

- Replace the Steering Wheel Lock Module. Shaft Lock Module - Removal
- Perform the RADIO FREQUENCY HUB VERIFICATION TEST. RF Hub Verification Test