DTC U0100: Power Control Unit Lost Communication With PCM (2017)
| DTC Description | DTC |
|---|---|
| U0100: Power Control Unit Lost Communication with PCM |
DTC (Power Control Unit)
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information - Refer to: HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS (2014 2015), or HOW TO TROUBLESHOOT THE GEAR UNIT CONTROL SYSTEM, or HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS (2017) .
- CAN gateway system DTC check
- 1. Check for CAN gateway system DTCs with the HDS.
DTC Description DTC U0029-00: CAN Gateway F-CAN ch A Bus Off U0047-00: CAN Gateway F-CAN ch B Bus Off DTC Description DTC U0056-00: CAN Gateway F-CAN ch C Bus Off U3000-49: CAN Gateway Internal Failure DTC (CAN GATEWAY)
Is DTC U0029-00, U0047-00, U0056-00, and/or U3000-49 indicated?
YES
Go to the troubleshooting for CAN gateway system DTC(s) - Refer to: COMMUNICATION SYSTEMS DTC TROUBLESHOOTING INDEX (2014), or COMMUNICATION SYSTEMS DTC TROUBLESHOOTING INDEX (2015), or COMMUNICATION SYSTEMS DTC TROUBLESHOOTING INDEX (2017) .
NO
Go to step 2.
- F-CAN circuit communication check
- 1. Select the FUNCTION TEST in the CAN gateway with the HDS, then select the F-CAN Bus Connected Unit Check.
Which result is indicated?
Keyless access control unit (Bus B) is Not Available
Go to step 3.
PCM (Bus A) is Not Available
Go to step 4.
PCM (Bus B) is Not Available
Go to step 5.
Keyless access control unit and PCM are Detect
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the keyless access control unit, the CAN gateway, and the PCM.
- Open wire check (F-CAN B lines)
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connectors.
CAN gateway 24P connector - Refer to: CAN GATEWAY REMOVAL AND INSTALLATION (2014 2015), or CAN GATEWAY REMOVAL AND INSTALLATION (2017) KEYLESS ACCESS CONTROL UNIT CONNECTOR C (24P) - 3. Check for continuity between test points 1 and 2 respectively.
Test condition Vehicle OFF (LOCK) mode CAN gateway 24P connector: disconnected
Keyless access control unit connector C (24P): disconnected
Test circuit F-CAN B_H Test point 1 CAN gateway 24P connector No. 11 (GRN) Test point 2 Keyless access control unit connector C (24P) No. 4 (GRN) Test circuit F-CAN B_L Test point 1 CAN gateway 24P connector No. 10 (LT GRN) Test point 2 Keyless access control unit connector C (24P) No. 5 (LT GRN) Is there continuity?
YES
The F-CAN B_H and F-CAN B_L wires are OK. Check for poor connections or loose terminals at the CAN gateway and the keyless access control unit. SUBSTITUTE A KNOWN-GOOD KEYLESS ACCESS CONTROL UNIT , then recheck. If the DTC U0100 goes away and the keyless access control unit was substituted, REPLACE THE ORIGINAL KEYLESS ACCESS CONTROL UNIT .
NO
Repair an open in F-CAN B_H or F-CAN B_L wire between the CAN gateway and the keyless access control unit.
- Open wire check (F-CAN A lines)
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Jump the SCS line with the HDS, and wait more than 1 minute.
SCS short
- 3. Disconnect the following connectors.
CAN gateway 24P connector - Refer to: CAN GATEWAY REMOVAL AND INSTALLATION (2014 2015), or CAN GATEWAY REMOVAL AND INSTALLATION (2017) PCM connector A (50P) - Refer to: PCM REMOVAL AND INSTALLATION (2014 2015), or PCM REMOVAL AND INSTALLATION (2017) - 4. Check for continuity between test points 1 and 2 respectively.
Test condition Vehicle OFF (LOCK) mode CAN gateway 24P connector: disconnected
PCM connector A (50P): disconnected
Test circuit F-CAN A_H Test point 1 CAN gateway 24P connector No. 14 (WHT) Test point 2 PCM connector A (50P) No. 37 (WHT) Test circuit F-CAN A_L Test point 1 CAN gateway 24P connector No. 15 (RED) Test point 2 PCM connector A (50P) No. 36 (RED) Is there continuity?
YES
The F-CAN A_H and F-CAN A_L wires are OK. Check for poor connections or loose terminals at the CAN gateway and the PCM. Substitute a known-good PCM - Refer to: PCM REMOVAL AND INSTALLATION (2014 2015), or PCM REMOVAL AND INSTALLATION (2017) , then recheck. If the DTC U0100 goes away and the PCM was substituted, replace the original PCM - Refer to: PCM REMOVAL AND INSTALLATION (2014 2015), or PCM REMOVAL AND INSTALLATION (2017) .
NO
Repair an open in F-CAN A_H or F-CAN A_L wire between the CAN gateway and the PCM.
- Open wire check (F-CAN B lines)
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Jump the SCS line with the HDS, and wait more than 1 minute.
SCS short
- 3. Disconnect the following connectors.
CAN gateway 24P connector - Refer to: CAN GATEWAY REMOVAL AND INSTALLATION (2014 2015), or CAN GATEWAY REMOVAL AND INSTALLATION (2017) PCM connector A (50P) - Refer to: PCM REMOVAL AND INSTALLATION (2014 2015), or PCM REMOVAL AND INSTALLATION (2017) - 4. Check for continuity between test points 1 and 2 respectively.
Test condition Vehicle OFF (LOCK) mode CAN gateway 24P connector: disconnected
PCM connector A (50P): disconnected
Test circuit F-CAN B_H Test point 1 CAN gateway 24P connector No. 11 (GRN) Test point 2 PCM connector A (50P) No. 39 (LT BLU) Test circuit F-CAN B_L Test point 1 CAN gateway 24P connector No. 10 (LT GRN) Test point 2 PCM connector A (50P) No. 38 (LT GRN) Is there continuity?
YES
The F-CAN B_H and F-CAN B_L wires are OK. Check for poor connections or loose terminals at the CAN gateway and the PCM. Substitute a known-good PCM - Refer to: PCM REMOVAL AND INSTALLATION (2014 2015), or PCM REMOVAL AND INSTALLATION (2017) , then recheck. If the DTC U0100 goes away and the PCM was substituted, replace the original PCM - Refer to: PCM REMOVAL AND INSTALLATION (2014 2015), or PCM REMOVAL AND INSTALLATION (2017) .
NO
Repair an open in F-CAN B_H or F-CAN B_L wire between the CAN gateway and the PCM.