Super All Wheel Control

DTC C2115: G and Yaw Rate Sensor Power Supply (High Voltage)

G AND YAW RATE SENSOR POWER SUPPLY





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.

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

DTC SET CONDITIONS
The code is set when high 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. C2115 set?
YES: Go to Step 3.
NO: This diagnosis is complete.

STEP 3. Scan tool diagnostic trouble code
Check the ASC diagnostic trouble code.

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 8.

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 8.
NO: Go to Step 6.

STEP 6. Scan tool service data
Check the following service data.
^ Item No. 26: Yaw rate sensor
^ Item No. 29: Lateral G sensor
^ Item No. 31: Longitudinal G sensor
^ Item No. 76: G and yaw rate sensor high voltage abnormality flag

Q: Is the check result normal?
YES: Go to Step 7.
NO: Replace the G and yaw rate sensor. Then go to Step 7.

STEP 7. Check whether the DTC is reset.

Q: Is DTC No. C2115 set?
YES: Replace the AWC-ECU. Then go to Step 8.
NO: Intermittent malfunction.

STEP 8. Check whether the DTC is reset.

Q: Is DTC No. C2115 set?
YES: Return to Step 1.
NO: This diagnosis is complete.