DTC U0125: G And Yaw Rate Sensor Message Time-Out Error/Message Error: Diagnosis

Required Special Tools:

MB991958 Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicle Communication Interface (VCI)
- MB991827 M.U.T.-III USB Cable
- MB991910 M.U.T.-III Main Harness A

STEP 1. Using scan tool MB991958, diagnose the CAN bus lines.
Use scan tool to diagnose the CAN bus lines.

Q: Is the check result normal?
1. YES: Go to Step 3.
2. NO: Repair the CAN bus lines. (Refer to CAN BUS DIAGNOSTICS TABLE ). On completion, go to Step 2.
STEP 2. DTC recheck after resetting CAN bus lines
Q: Is DTC U0125 set?
1. YES: Go to Step 3.
2. NO: The procedure is complete.
STEP 3. Connector check: A-02 ASC-ECU connector, C-26 G and yaw rate sensor connector
Q: Is the check result normal?
1. YES: Go to Step 4.
2. NO: Repair the connector, and then go to Step 7.
STEP 4. Wiring harness check between A-02 ASC-ECU connector terminals No. 18 and C-26 G and yaw rate sensor connector terminals No. 3, and between A-02 ASC-ECU connector terminals No. 19 and C-26 G and yaw rate sensor connector terminals No. 2.
Check for open and short circuit in communication circuit

Q: Is the check result normal?
1. YES: Go to Step 5.
2. NO: Repair the wiring harness, and then go to Step 7.
STEP 5. Check whether the DTC is reset.
Erase the DTC.

Q: Is DTC U0125 set?
1. YES: Replace the G and yaw rate sensor (Refer to G AND YAW RATE SENSOR ) and then go to Step 6.
2. NO: The procedure is complete.
STEP 6. Check whether the DTC is reset.
Erase the DTC.

Q: Is DTC U0125 set?
1. YES: Replace the hydraulic unit (integrated with ASC-ECU) (Refer to HYDRAULIC UNIT ), and then go to Step 7.
2. NO: The procedure is complete.
STEP 7. Check whether the DTC is reset.
Erase the DTC.

Q: Is DTC U0125 set?
1. YES: Return to Step 1.
2. NO: The procedure is complete.