DTC U0100: Power Control Unit (Body Control Module) Lost Communication with PCM DTC U0122: Power Control Unit (Body Control Module) Lost Communication with VSA Modulator-Control Unit (VSA Message)
According to the detected DTC(s), check for the power circuit and the ground circuit of the control unit which cannot communicate with the body control module.
Refer to the DTC shown on the display, then inspect the connectors and terminals based on the instructions.
DTC Description
DTC
U0100 Power Control Unit (Body Control Module) Lost Communication with PCM
U0122 Power Control Unit (Body Control Module) Lost Communication with VSA Modulator-Control Unit (VSA Message)
1.
CAN gateway system DTC check:
CAN gateway system DTC check
?1.
Turn the vehicle to the ON mode.
?2.
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
U3000-49 CAN Gateway Internal Failure
Is DTC U0029-00, U0047-00, and/or U3000-49 indicated?
Repair an open in F-CAN A_H or F-CAN A_L wire between the CAN gateway and the body control module.?
4.
F-CAN circuit communication check (Transmitting control unit):
F-CAN circuit communication check (Transmitting control unit)
?1.
Select the FUNCTION TEST in the CAN gateway with the HDS, then select the F-CAN Bus Connected Unit Check.
?2.
According to the detected DTC on the following table, make sure that the transmitting control unit detects the CAN gateway Bus channel(s) normally.
DTC
Transmitting control unit
Detected CAN gateway Bus channel(s) at normal
U0100
PCM
A, B
U0122
VSA modulator-control unit
A, B
Is it detected normally?
Detected normal
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the transmitting control unit and the CAN gateway.?
U0100: PCM is Not Available for Bus A
Go to step 5.
U0100: PCM is Not Available for Bus B
Go to step 6.
U0122: VSA modulator-control unit is Not Available for Bus A
Go to step 5.
U0122: VSA modulator-control unit is Not Available for Bus B
Go to step 6.
5.
Open wire check (F-CAN A lines):
Open wire check (F-CAN A lines)
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
U0100: Jump the SCS line with the HDS, and wait more than 1 minute.
?3.
According to the detected DTC on the following table, disconnect the transmitting control unit connector(s).
DTC
Connector
-
CAN gateway 12P connector*1 CAN gateway 16P connector*2
U0100
PCM connector A (50P)*3 PCM connector No. 2 (58P)*4
U0122
VSA modulator-control unit 46P connector
*1: CAN gateway 12P connector type *2: CAN gateway 16P connector type *3: Except K20C1 engine *4: K20C1 engine
?4.
Check for continuity between test points 1 and 2.
CAN gateway 12P connector type
Test condition
Vehicle OFF (LOCK) mode CAN gateway 12P connector: disconnected Transmitting control unit connector(s) for indicated DTCs: disconnected
The F-CAN A_H wire and the F-CAN A_L wire are OK. Refer to the DTC shown on the display, substitute or replace the control unit based on the instructions (see table).?
The F-CAN B_H wire and the F-CAN B_L wire are OK. Refer to the DTC shown on the display, substitute or replace the control unit based on the instructions (see table).?
