DTC C1513: Torque sensor power supply: 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
- MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

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
1. Erase the DTC.
2. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
3. Check if the DTC is set.
Q: Is the DTC C1513 set?
1. YES: Go to Step 3.
2. NO: This diagnosis is complete.
STEP 3. Check the following connector.
Check the connectors below for improper engagement, terminal damage or terminal drawn in the connector case.
- C-140 and C-141-1 electric power steering-ECU connector
- Body ground point
- Torque sensor intermediate connector of the wiring harness for steering gear box & linkage assembly (connection and appearance checks only)
Q: Is the connectors and terminals in good condition?
1. YES: Go to Step 4.
2. NO: Replace the steering gear and linkage assembly (Refer to POWER STEERING GEAR BOX AND LINKAGE ). Then go to Step 8.
STEP 4. Wiring harness check
1. Check the wiring harness between the C-141-1 electric power steering-ECU connector terminals No. 30 or No. 31 and the torque sensor for damage or other problem.
2. Check the wiring harness between the C-140 electric power steering-ECU connector terminal No. 12 and the body ground point for damage or other problem.
Q: Is the wiring harness in good condition?
1. YES: Go to Step 5.
2. NO: Replace the steering gear and linkage assembly (Refer to POWER STEERING GEAR BOX AND LINKAGE ). Then go to Step 8.
STEP 5. Voltage measurement at the electric power steering-ECU connector
1. The steering is in the neutral position.
2. Measure the electric power steering-ECU voltage without disconnecting the connector (by backprobing).
3. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
4. Measure the voltage between the C-141-1 electric power steering-ECU connector terminal No. 30 and No. 31.
  OK: 5 ± 0.2 V
  
  Fig 1: Measuring Voltage Between C-141-1 Electric Power Steering-ECU Connector Terminal No. 30 And No. 31
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Is the check result normal?
1. YES: Go to Step 6.
2. NO: Replace the Steering gear and linkage assembly (Refer to POWER STEERING GEAR BOX AND LINKAGE ). Then go to Step 8.
STEP 6. Using scan tool MB991958, check the data list
1. The steering is in the neutral position.
2. Check the following data list DATA LIST REFERENCE TABLE .
  - Item No. 03: Torque sensor (power supply)
Q: Is the check result normal?
1. YES: Go to Step 8.
2. NO: Go to Step 7.
STEP 7. Check whether the DTC is reset.
1. Erase the DTC.
2. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
3. Check if the DTC is set.
Q: Is the DTC C1513 set?
1. YES: Replace the electric power steering-ECU (Refer to ELECTRIC POWER STEERING CONTROL UNIT (EPS-ECU) ). Then go to Step 8.
2. NO: Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS ).
STEP 8. Check whether the DTC is reset.
1. Erase the DTC.
2. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
3. Check if the DTC is set.
Q: Is the DTC C1513 set?
1. YES: Return to Step 1.
2. NO: This diagnosis is complete.