DTC U0155: Immobilizer-keyless control unit lost communication with gauge control module DTC U0199: Immobilizer-keyless control unit lost communication with door multiplex control unit DTC U1281: Lost communication with MICU (MICU frame) DTC U128D: Lost communication with METER
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
U0155 Immobilizer-keyless control unit lost communication with gauge control module
U0199 Immobilizer-keyless control unit lost communication with door multiplex control unit
U1281 Lost communication with MICU (MICU frame)
U128D Lost communication with METER
1.
Problem verification:
Problem verification
?1.
Clear the DTC 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
U0155 Immobilizer-keyless control unit lost communication with gauge control module
U0199 Immobilizer-keyless control unit lost communication with door multiplex control unit
U1281 Lost communication with MICU (MICU frame)
U128D Lost communication with METER
Are any DTCs indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals.?
2.
Open wire check (B-CAN_H line, B-CAN_L line):
Open wire check (B-CAN_H line, B-CAN_L line)
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Disconnect the receiving control unit connector.
Immobilizer-keyless control unit 7P connector
?3.
Disconnect the transmitting control unit connector(s).
Refer to the DTC shown on the display, then disconnect the connector(s) based on the instructions (see table).
DTC
Connector
U0155
Gauge control module connector A (32P)
U0199
Power window master switch 37P connector
U1281
Body control module connector B (36P)
U128D
Gauge control module connector A (32P)
?4.
Check for continuity between the receiving control unit and the transmitting control unit on the B-CAN_H circuit and the B-CAN_L circuit.
Test condition
Vehicle OFF (LOCK) mode Immobilizer-keyless control unit 7P connector: disconnected Transmitting control unit connector(s) for indicated DTCs: disconnected
