DTC U0100-00: CAN Communication Failure With ECM/PCM DTC U0122-00: CAN Communication Failure With VSA (CAN Ch1) DTC U12B5-00: CAN Communication Failure With VSA (CAN Ch2)
According to the detected DTC(s), check for the power circuit and the ground circuit of the control unit which cannot communicate with the electric brake booster.
DTC Description
DTC
Freeze Frame
U0100-00 CAN Communication Failure With ECM/PCM
U0122-00 CAN Communication Failure With VSA (CAN Ch1)
U12B5-00 CAN Communication Failure With VSA (CAN Ch2)
1.
DTC check:
DTC check
?1.
Turn the vehicle to the ON mode.
?2.
Clear the DTC with the HDS.
?3.
Turn the vehicle to the OFF (LOCK) mode, then wait 5 seconds or more.
NOTE: Do not open and close the driver's door.
?4.
Turn the vehicle to the ON mode.
?5.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
U0100-00 CAN Communication Failure With ECM/PCM
U0122-00 CAN Communication Failure With VSA (CAN Ch1)
U12B5-00 CAN Communication Failure With VSA (CAN Ch2)
Is DTC indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?
2.
DTC check (CAN gateway system):
DTC check (CAN gateway system)
?1.
Check for CAN gateway system DTCs with the HDS.
DTC Description
DTC
Is DTC indicated?
YES
Go to indicated DTC's troubleshooting.?
NO
Go to step 3.
3.
F-CAN circuit communication check (Receiving control unit):
F-CAN circuit communication check (Receiving control unit)
?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?
Electric brake booster (Bus A) is Not Available
Go to step 4.
Electric brake booster (Bus B) is Not Available
Go to step 5.
Electric brake booster (Bus A and B) is Available
Go to step 6.
4.
Open wire check (F-CAN A_H, F-CAN A_L lines):
Open wire check (F-CAN A_H, F-CAN A_L lines)
?1.
Turn the vehicle to the OFF (LOCK) mode with driver's door open.
?2.
Wait for 3 minutes.
NOTE: Do not close the driver's door.
?3.
Disconnect the following connectors.
Electric brake booster 26P connector
CAN gateway 12P connector
?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Electric brake booster 26P connector: disconnected
CAN gateway 12P connector (female terminals) No. 9:
Is there continuity?
YES
The F-CAN A_H and F-CAN A_L wires are OK. Check for loose terminals and poor connections in the electric brake booster 26P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the electric brake booster.?
NO
Repair an open in the wire between the electric brake booster and the CAN gateway.?
5.
Open wire check (F-CAN B_H, F-CAN B_L lines):
Open wire check (F-CAN B_H, F-CAN B_L lines)
?1.
Turn the vehicle to the OFF (LOCK) mode with driver's door open.
?2.
Wait for 3 minutes.
NOTE: Do not close the driver's door.
?3.
Disconnect the following connectors.
Electric brake booster 26P connector
CAN gateway 12P connector
?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Electric brake booster 26P connector: disconnected
CAN gateway 12P connector (female terminals) No. 5:
Is there continuity?
YES
The F-CAN B_H and F-CAN B_L wires are OK. Check for loose terminals and poor connections in the electric brake booster 26P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the electric brake booster.?
NO
Repair an open in the wire between the electric brake booster and the CAN gateway.?
6.
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 getaway Bus channel(s) at normal
U0100-00
PCM
A, B
U0122-00
VSA modulator-control unit
A
U12B5-00
VSA modulator-control unit
B
Is it detected normally?
Detected normal
Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?
U0100-00: PCM (Bus A) is Not Available
Go to step 7.
U0100-00: PCM (Bus B) is Not Available
Go to step 8.
U0122-00: VSA modulator-control unit (Bus A) is Not Available
Go to step 7.
U12B5-00: VSA modulator-control unit (Bus B) is Not Available
Go to step 8.
7.
Open wire check (F-CAN A_H, F-CAN A_L lines):
Open wire check (F-CAN A_H, F-CAN A_L lines)
?1.
Turn the vehicle to the OFF (LOCK) mode with driver's door open.
?2.
Wait for 3 minutes.
NOTE: Do not close the driver's door.
?3.
Disconnect the following connectors according to the detected DTC.
DTC
Connector
CAN gateway 12P connector
U0100-00
PCM connector A (50P)
U0122-00
VSA modulator-control unit 46P connector
NOTE: Jump the SCS line with the HDS, and wait more than 1 minute when disconnecting the PCM connector.
?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Transmitting control unit connector(s) for indicated DTCs: disconnected
The F-CAN A_H and F-CAN A_L wires are OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. According to the detected DTC on the following table, substitute or replace the correspond control unit.?
The F-CAN B_H and F-CAN B_L wires are OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. According to the detected DTC on the following table, substitute or replace the correspond control unit.?
