DTC 81: Steering Angular Velocity Sensor (ST-1) System: DTC 82: Steering Angular Velocity Sensor (ST-2) System: DTC 83: Steering Angular Velocity Sensor (ST-N) System: Diagnosis
Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827: M.U.T.-III USB Cable
- MB991911: M.U.T.-III Main Harness B
- STEP 1. Using scan tool MB991958, check data list. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOOK" (OFF) position before connecting or disconnecting scan tool MB991958.
- Connect scan tool MB991958 as shown in the illustration.
- Start the engine.
- Set scan tool MB991958 to data reading mode for following items.
- Item 74: Steering angular velocity (ST-N)
- Item 75: Steering angular velocity (ST-1)
- Item 76: Steering angular velocity (ST-2)
- Confirm the indicated ON/OFF state as follows:CHECK ITEM AND DISPLAY CHART
ITEM NO. CHECK ITEM CHECKING REQUIREMENT DISPLAY 74 Steering angular velocity sensor (ST-N) Steering: Neutral position and position near by +/- 360° ON Steering: Except for above OFF 75 Steering angular velocity sensor (ST-1) Steering: Turn laterally slowly. Display ON and OFF alternately 76 Steering angular velocity sensor (ST-2)
Q: Is the steering angular velocity sensor input normal?
YES: This malfunction is intermittent. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .
NO: Go to Step 2.
- STEP 2. Check the power supply circuit. Measure the voltage at steering angular velocity sensor connector C-230.
- Disconnect connector C-230, and check at the harness side.
- Turn the ignition switch to the "ON" position.
- Measure the voltage between terminal 2 and ground. It should measure approximately 12 volts (battery positive voltage).
Q: Is battery positive voltage (approximately 12 volts) present?
YES: Go to Step 3.
NO: Go to Step 4.
- STEP 3. Check the ground circuit. Measure the resistance at steering angular velocity sensor connector C-230.
- Disconnect connector C-230, and check at the harness side.
- Measure the resistance between terminal 3 and ground. It should measure less than 2 ohms.
Q: Is the resistance 2 ohms or less?
YES: Go to Step 8.
NO: Go to Step 6.
- STEP 4. Check the following connectors.
- Steering angular velocity sensor connector C-230
- Junction block connectors C-210, C-211
- Joint connector C-101
Check the connectors for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES: Go to Step 5.
NO: Repair it and then go to Step 11.
- STEP 5. Check the following harness wire.
The wire between steering angular velocity sensor connector C-230 (terminal 2) and junction block connector C-211 (terminal 2)
Q: Is the harness wire damaged?
YES: Repair or replace it and then go to Step 11.
NO: Go to Step 11.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
- STEP 6. Check the following connectors.
- Steering angular velocity sensor connector C-230
- Joint connector C-06
Check the connectors for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES: Go to Step 7.
NO: Repair it and then go to Step 11.
- STEP 7. Check the following harness wires.
The wire between steering angular velocity sensor connector C-230 (terminal 3) and ground (No.3, No.14)
Q: Is any harness wire damaged?
YES: Repair or replace it and then go to Step 11.
NO: Go to Step 11.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
- STEP 8. Check steering angular velocity sensor output voltage.
- Connect steering angular velocity sensor connector C-230.
- Turn the ignition switch to the "ON" position.
- Measure the voltage, by backprobing, between terminal 1 and ground, terminal 4 and ground, and terminal 5 and ground. The voltage should measure as indicated in the figure.
Q: Is the steering angular velocity sensor output voltage normal?
YES: Go to Step 9.
NO: Replace the steering angular velocity sensor (Refer to STEERING ANGULAR VELOCITY SENSOR ). Then go to Step 11.
- STEP 9. Check the following connectors.
- Steering angular velocity sensor connector C-230
- Intermediate connector C-122
- ABS-ECU connector B-118
Check the connectors for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES: Go to Step 10.
NO: Repair it and then go to Step 11.
- STEP 10. Check the following harness wires.
- If DTC 81 (ST-1) is set: The wire between steering angular velocity sensor connector C-230 (terminal 5) and ABS-ECU connector B-118 (terminal 26)
- If DTC 82 (ST-2) is set: The wire between steering angular velocity sensor connector C-230 (terminal 4) and ABS-ECU connector B-118 (terminal 17)
- If DTC 83 (ST-N) is set: The wire between steering angular velocity sensor connector C-230 (terminal 1) and ABS-ECU connector B-118 (terminal 4)
Q: Is any harness wire damaged?
YES: Repair or replace it and then go to Step 11.
NO: Replace the brake modulator hydraulic unit (integrated with ABS-ECU) (Refer to HYDRAULIC UNIT ). Then go to Step 11.
- STEP 11. Recheck for diagnostic trouble code.
Check again if the DTC is set.
- Turn the ignition switch to the "ON" position.
- Erase the DTC.
- Turn the ignition switch to the "LOCK"(OFF) position.
- Turn the ignition switch to the "ON" position.
- Check if the DTC is set.
- Turn the ignition switch to the "LOCK"(OFF) position.
Q: Does DTC 81, 82 and/or 83 reset?
YES: Return to Step 1.
NO: The procedure is complete.