DTC : U0100, U0122 (Keyless Access Power Control Unit: 9-Speed A/T WITHOUT CAN Gateway) (2019 2020 2021)

DTC U0100  : Power Control Unit Lost Communication with PCM

DTC U0122  : Power Control Unit Lost Communication with ABS/VSA Modulator-Control Unit

NOTE: 

• If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Go to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks .
• According to the detected DTC(s), check for the power circuit and the ground circuit of the control unit which cannot communicate with the keyless access/TPMS control unit.
• Refer to the DTC shown on the display, then inspect the connectors and terminals based on the instructions.

DTC (Power Control Unit)

1. Problem verification

   - 1. Clear the DTCs with the HDS.

   Clear DTCs

   - 2. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

   - 3. Wait for at least 6 seconds.

   - 4. Check for DTCs with the HDS.

   DTC Description	DTC
   U0100 Power Control Unit Lost Communication with PCM
   U0122 Power Control Unit Lost Communication with ABS/VSA Modulator-Control Unit

   Are DTC U0100 or U0122 indicated?

   YES 

   Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for loose or poor connections.

2. Open wire check (F-CAN A_H, F-CAN A_L lines)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connector.

   Keyless access/TPMS control unit connector C (20P)

   - 3. U0100: Jump the SCS line with the HDS, and wait more than 1 minute.

   SCS short

   - 4. Disconnect the transmitting control unit connectors.

   PCM connector A (50P)

   VSA modulator-control unit 38P connector

   - 5. Check for continuity between the receiving control unit and the transmitting control unit on the F-CAN A_H circuit and the F-CAN A_L circuit as specified in the table while in the vehicle OFF (LOCK) mode.

   DTC	CIRCUIT NAME	RECEIVING CONTROL UNIT	TRANSMITTING CONTROL UNIT
   U0100	F-CAN A_H	Keyless access/TPMS control unit connector C (20P) No. 2 - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2019 2020 2021) .	PCM connector A (50P) No. 11 - Go to: PCM Connector for Inputs and Outputs (9-Speed A/T) (2019 2020 2021)
   	F-CAN A_L	Keyless access/TPMS control unit connector C (20P) No. 12 - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2019 2020 2021) .	PCM connector A (50P) No. 10 - Refer to: PCM Connector for Inputs and Outputs (9-Speed A/T) (2019 2020 2021)
   U0122	F-CAN A_H	Keyless access/TPMS control unit connector C (20P) No. 2 - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2019 2020 2021) .	VSA modulator-control unit 38P connector No. 6 - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2019 2020 2021) .
   	F-CAN A_L	Keyless access/TPMS control unit connector C (20P) No. 12 - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2019 2020 2021) .	VSA modulator-control unit 38P connector No. 7 - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2019 2020 2021) .

   Is there continuity?

   YES 

   The F-CAN A_L to F-CAN A_H wire is OK. According to the detected DTC on the following table replace the correspond control unit.

   DTC	Operation for transmitting control unit
   U0100	PCM - Go to: PCM - Removal and Installation (9-Speed A/T) (2019 2020 2021) or
   U0122	VSA modulator-control unit - Go to: Removal and Installation

   NO 

   Repair an open or high resistance in the F-CAN A_H and/or F-CAN A_L wire.