DTC U0100, U0122 (Keyless Access Power Control Unit (Without CAN Gateway)) (2017 2018 2019)
DTC U0100 : Power control unit lost communication with PCM
DTC U0122 : Power control unit lost communication with VSA modulator-control unit (VSA message)
NOTE:
- Refer to the DTC code shown on the display, and then inspect the connectors and terminals based on the instructions in the table below.
- The DTC may be stored due to the grounding failure or the power source failure at the transmitting control unit (the grounding inspection and the power source inspection on each control unit are required prior to this checking process).
| DTC Description | DTC |
|---|---|
| U0100 Power control unit lost communication with PCM | |
| U0122 Power control unit lost communication with VSA modulator-control unit (VSA message) |
DTC (Power Control Unit)
NOTE:
- If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .
- If you have any loss of communication DTCs for the PCM, troubleshoot those DTCs first.
- 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 VSA modulator-control unit (VSA message) 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.
- Open wire check (F-CAN_H, F-CAN_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. Jump the SCS line with the HDS, and wait more than 1 minute.
-4. Disconnect the following connectors.
PCM connector A (51P) VSA modulator-control unit 38P connector -5. Check for continuity between the receiving control unit and the transmitting control unit on the F-CAN_H circuit and the F-CAN_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_H Keyless access/TPMS control unit connector C (20P) No. 2 PCM connector A (51P) No. 9 F-CAN_L Keyless access/TPMS control unit connector C (20P) No. 12 PCM connector A (51P) No. 10 U0122 F-CAN_H Keyless access/TPMS control unit connector C (20P) No. 2 VSA modulator-control unit 38P connector No. 6 F-CAN_L Keyless access/TPMS control unit connector C (20P) No. 12 VSA modulator-control unit 38P connector No. 7 Is there continuity?
YES
The F-CAN_L to F-CAN_H wire is OK. Go to step 3.
NO
Repair an open or high resistance in the wire(s).
- Determine possible failure area (the receiving control unit or the transmitting control unit)
-1. Reconnect all connectors.
-2. Clear the DTCs with the HDS.
Clear DTCs
-3. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.
-4. Wait for at least 6 seconds.
-5. Check for DTCs with the HDS.
DTC Description DTC U0100 Power control unit lost communication with PCM U0122 Power control unit lost communication with VSA modulator-control unit (VSA message) Are DTC U0100 and U0122 indicated?
YES
Check for loose terminals and poor connections in the keyless access/TPMS control unit connector. Check is OK, replace the keyless access/TPMS control unit .
NO
The keyless access/TPMS control unit is OK at this time. Replace the transmitting control unit.
(Refer to the DTC code shown on the display, and then replace the control unit based on the instructions in the chart below.)
DTC TRANSMITTING CONTROL UNIT U0100 Replace the PCM U0122 Replace the VSA modulator-control unit