Diagnostic Procedure

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

STEP 1. Scan tool (M.U.T.-III) CAN bus diagnostics
Use scan tool (M.U.T.-III) to diagnose the CAN bus lines.

Q: Is the check result normal?
1. YES: Go to Step 2.
2. NO: Repair the CAN bus lines (Refer to CAN BUS DIAGNOSTICS TABLE ).
STEP 2. Voltage measurement at the EPS-ECU connector (IG1, +BB, GND terminal)
1. Measure the EPS-ECU voltage without disconnecting the connector (by backprobing).
2. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
3. Measure the voltage between the EPS-ECU connector (IG1 terminal) and the EPS-ECU connector (GND terminal) or body ground.
  OK: Approximately system voltage
4. Measure the voltage between the EPS-ECU connector (+BB terminal) and the EPS-ECU connector (GND terminal) or body ground.
  OK: Approximately system voltage
Q: Is the check result normal?
1. YES: Go to Step 5.
2. NO: Go to Step 3.
STEP 3. Check of short to power supply, short to ground, and open circuit in +BB line between fusible link and EPS-ECU connector
Q: Is the check result normal?
1. YES: Go to Step 4.
2. NO: Repair the fusible link, connector(s) or wiring harness.
STEP 4. Check of short to power supply, short to ground, and open circuit in IG1 line between EPS-ECU connector and ETACS-ECU connector
Q: Is the check result normal?
1. YES: Go to Step 5.
2. NO: Repair the connector(s) or wiring harness.
STEP 5. Retest the system
Q: Is the check result normal?
1. YES: Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
2. NO: Replace the EPS-ECU (Refer to REMOVAL AND INSTALLATION ).