DTC U0100: Power Control Unit Lost Communication with PCM (L4, Keyless Access Power Control Unit) (2015-17)

DTC (Power Control Unit)

1. Problem verification

   -1. Clear the DTCs with the HDS.

   - 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

   Is DTC U0100 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 lines)

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

   - 2. Jump the SCS line with the HDS.

   SCS short

   - 3. Disconnect the following connectors.

   PCM connector A (51P)

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

   - 4. Connect terminals A and B with a jumper wire.

   Terminal A	PCM connector A (51P) No. 2 - Refer to: PCM Connector for Inputs and Outputs (L4) (2015-17) or PCM Connector for Inputs and Outputs (V6, Without Auto Idle Stop System) (2015-17) or PCM Connector for Inputs and Outputs (V6, With Auto Idle Stop System) (2015-17) or PCM Connector for Inputs and Outputs (L4) (2018-19), or PCM Connector for Inputs and Outputs (V6) (2018-19)
   Terminal B	PCM connector A (51P) No. 3 - Refer to: PCM Connector for Inputs and Outputs (L4) (2015-17) or PCM Connector for Inputs and Outputs (V6, Without Auto Idle Stop System) (2015-17) or PCM Connector for Inputs and Outputs (V6, With Auto Idle Stop System) (2015-17) or PCM Connector for Inputs and Outputs (L4) (2018-19), or PCM Connector for Inputs and Outputs (V6) (2018-19)

   - 5. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode PCM connector A (51P): disconnected Keyless access/TPMS control unit connector C (20P): disconnected
   Test point 1	Keyless access/TPMS control unit connector C (20P) No. 2
   Test point 2	Keyless access/TPMS control unit connector C (20P) No. 12

   Is there continuity?

   YES 

   The F-CAN wires are OK. Replace the keyless access/TPMS control unit .

   NO 

   An open or poor connection in the F-CAN wires between the PCM and the keyless access/TPMS control unit.