Inspection Procedure 2: Malfunction Of The Ignition Switch Power Supply System: Diagnosis

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.

Required Special Tools:

MB992006: Extra fine probe
MB991223: Harness set

STEP 1. Voltage measurement at ignition switch connector
1. Disconnect the ignition switch connector and measure the voltage at ignition switch connector harness side.
2. Check the voltage between the ignition switch connector (power supply terminal) and ground.
  OK: Is the measured voltage approximately 12 volts (battery positive voltage)?
Q: Is the check result normal?
- YES: Go to Step 4.
- NO: Go to Step 2.
STEP 2. Check the fuse.
Q: Is the check result normal?
- YES: Go to Step 3.
- NO: Replace the fuse. (Check that there is not a short to ground in the circuit of lower reaches before replacing. If there are any problems, replace the fuse after the circuit of lower reaches is repaired.)
STEP 3. Check of open circuit in IG+ line between ignition switch connector and ETACS-ECU connector.
Q: Is the check result normal?
- YES: Go to Step 4.
- NO: Repair the connector(s) or wiring harness.
STEP 4. Check the ignition switch.
Refer to IGNITION SWITCH CHECK .

Q: Is the ignition switch in good condition?
- YES: Go to Step 5.
- NO: Replace the ignition switch.
STEP 5. Retest the system.
Q: Do the device and the system work normally when the ignition switch is operated?
- YES: The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
- NO: Replace the ETACS-ECU.