DTC U128D: Keyless Access Control Unit (Body Control Module) Lost Communication with Gauge Control Module
NOTE:
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.
U128D Keyless Access Control Unit (Body Control Module) Lost Communication with Gauge Control Module
1.
Problem verification:
Problem verification
?1.
Turn the vehicle to the ON mode.
?2.
Clear the DTC with the HDS.
?3.
Turn the vehicle to the OFF (LOCK) mode and then the ON mode.
?4.
Wait for at least 6 seconds.
?5.
Check for DTCs with the HDS.
DTC Description
DTC
U128D Keyless Access Control Unit (Body Control Module) Lost Communication with Gauge Control Module
Is DTC U128D indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the transmitting control units and the body control module.?
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.
Body control module connector B (36P)
?3.
Disconnect the transmitting control unit connector.
Refer to the DTC shown on the display, then disconnect the connector based on the instructions (see table).
DTC
Connector
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 Body control module connector B (36P): disconnected Transmitting control unit connector for indicated DTCs: disconnected
