DTC Troubleshooting: U0100, U0122, U0128, U0131, U0151(Gauge Control Module) (2016 2017 2018)
DTC U0100 : Gauge control module lost communication with ECM/PCM DTC U0122 : Gauge control module lost communication with VSA modulator-control unit (VSA message)DTC U0131 : Gauge control module lost communication with EPS unit DTC U0151 : Gauge control module lost communication with SRS unit (SRS message)DTC U129C : Gauge control module lost communication with multi purpose camera unit
NOTE:
- Refer to the DTC code shown on the display, and then inspect the connectors and terminals based on the instructions in the chart 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 |
|---|---|
| U0100 Gauge control module lost communication with ECM/PCM | |
| U0122 Gauge control module lost communication with VSA modulator-control unit (VSA message) | |
| U0131 Gauge control module lost communication with EPS Unit | |
| U0151 Gauge control module lost communication with SRS unit (SRS message) | |
| U129C Gauge control module lost communication with multi purpose camera unit |
DTC (Gauge Control Module)
NOTE:
- If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .
- If you have any loss of communication DTCs for the PCM, troubleshoot those DTCs first.
- Problem verification
-1. Clear the DTCs 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 U0100 Gauge control module lost communication with ECM/PCM U0122 Gauge control module lost communication with VSA modulator-control unit (VSA message) U0131 Gauge control module lost communication with EPS Unit U0151 Gauge control module lost communication with SRS unit (SRS message) U129C Gauge control module lost communication with multi purpose camera unit Is any of DTC 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 PCM. 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.
- Open wire check (F-CAN_L, F-CAN_H lines)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Jump the SCS line with the HDS.
SCS short
-3. Disconnect the receiving control unit connector.
Gauge control module 32P connector -4. Disconnect the transmitting control unit connectors. (Refer to the DTC code shown on the display, and then disconnect the connector(s) based on the instructions in the chart below.)
PCM connector A (51P) VSA modulator-control unit 21P connector EPS control unit connector B (6P) SRS unit connector A (39P) Multi purpose camera unit 12P connector -5. Check for continuity between the receiving control unit and the transmitting control unit on the F-CAN_H circuit and the F-CAN_L circuit as specified in the chart while in the vehicle OFF mode.
Is there continuity?
YES
The F-CAN_L and F-CAN_H wires are OK at this time, replace the transmitting control unit. (Refer to the DTC code shown on the display, and then replace the control unit based on the instructions in the chart below.)
DTC TRANSMITTING CONTROL UNIT U0100 Gauge control module lost communication with ECM/PCM PCM U0122 Gauge control module lost communication with VSA modulator-control unit (VSA message) VSA modulator-control unit U0131 Gauge control module lost communication with EPS Unit EPS control unit U0151 Gauge control module lost communication with SRS unit (SRS message) SRS unit U129C Gauge control module lost communication with multi purpose camera unit Multi purpose camera unit NO
Repair an open in the F-CAN_L and/or F-CAN_H wires between the receiving control unit and the transmitting control unit.