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
U1281 Gauge control module lost communication with MICU (MICU frame)
U128F Gauge control module lost communication with BSI unit
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
U1281 Gauge control module lost communication with MICU (MICU frame)
U128F Gauge control module lost communication with BSI unit
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.
Gauge control module connector A (32P)
?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
U1281
Body control module connector B (36P)
U128F
Left side BSI radar unit 6P connector
?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 Gauge control module connector A (32P): disconnected Transmitting control unit connector(s) for indicated DTCs: disconnected
