S-AWC

DTC C2114: G and Yaw Rate Sensor Power Supply (Low Voltage)














CAUTION
^ If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines.
^ Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
^ Do not drop the G and yaw rate sensor or subject it to a shock.
^ When G and yaw rate sensor is replaced, calibrate G and yaw rate sensor and initialize the lateral/longitudinal acceleration correction amount stored in AWC-ECU. (Refer to item No.2: Lateral acceleration correction amount initialization, and No.3: Longitudinal acceleration correction amount initialization Special Function Reference Table)

OPERATION
AWC-ECU receives the self-diagnosis status of G and yaw rate sensor.

DTC SET CONDITIONS
The code is set when low voltage status information of G and yaw rate sensor power supply is received.

PROBABLE CAUSES
^ Malfunction of G and yaw rate sensor
^ Malfunction of ASC-ECU
^ Damaged harness wires and connectors
^ Malfunction of AWC-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.
Q: Is the check result normal?
YES: Go to Step 3.
NO: Repair the CAN bus lines. After repairing the CAN bus line, go to Step 2.

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. C2114 set?
YES: Go to Step 3.
NO: This diagnosis is complete.

STEP 3. Scan tool diagnostic trouble code
Check the ASC diagnostic trouble code. Diagnostic Trouble Code Descriptions
Q: Is the DTC set?
YES: Perform the relevant troubleshooting.
NO: Go to Step 4.

STEP 4. ASC-ECU connector, G and yaw rate sensor connector check: A-05, C-38
Q: Is the check result normal?
YES: Go to Step 5.
NO: Repair the defective connector. Then go to Step 10.

STEP 5. Voltage measurement at the C-38 G and yaw rate sensor connector
1) Disconnect the connector, and measure the voltage between terminal No. 1 and ground at the harness side.
2) Turn the ignition switch to the "ON" position.
OK: Battery positive voltage
Q: Is the check result normal?
YES: Go to Step 7.
NO: Go to Step 6.

STEP 6. Check the wiring harness between A-05 ASC-ECU connector terminal No. 22 and C-38 G and yaw rate sensor connector terminal No. 1.
Check the wiring harness for open or short circuit (short to ground).
Q: Is the check result normal?
YES: Replace the ASC-ECU. Then go to Step 10.
NO: Repair the wiring harness. Then go to Step 10.

STEP 7. Check the wiring harness between A-05 ASC-ECU connector terminal No. 29 and C-38 G and yaw rate sensor connector terminal No. 5.
Check the wiring harness for open circuit.
Q: Is the check result normal?
YES: Go to Step 8.
NO: Repair the wiring harness. Then go to Step 10.

STEP 8. Scan tool service data
Check the following service data. (Data List Reference Table)
^ Item No. 26: Yaw rate sensor
^ Item No. 29: Lateral G sensor
^ Item No. 31: Longitudinal G sensor
^ Item No. 75: G and yaw rate sensor low voltage abnormality flag
Q: Is the check result normal?
YES: Go to Step 9.
NO: Replace the G and yaw rate sensor. Then go to Step 9.

STEP 9. Check whether the DTC is reset.
Q: Is DTC No. C2114 set?
YES: Replace the AWC-ECU. Then go to Step 10.
NO: Intermittent malfunction.

STEP 10. Check whether the DTC is reset.
Q: Is DTC No. C2114 set?
YES: Return to Step 1.
NO: This diagnosis is complete.