Inspection Procedure 2: Power supply circuit 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.

STEP 1. Fuse Nos. 15, 16 check.
Q: Is the fuse in good condition?
1. YES: Go to Step 3.
2. NO: Go to Step 2.
STEP 2. Fuse open circuit check
1. Replace the fuse.
2. Turn the ignition switch to the "ON" position, wait for at least one minute, and then turn the switch OFF.
3. Check the fuse.
Q: Is the fuse in good condition?
1. YES: Go to Step 3.
2. NO: Repair the wiring harness IG1A line between the ETACS-ECU connector and the SRS-ECU connector, and replace the fuse.
STEP 3. Check of open circuit in GND2 line between SRS-ECU and body ground.
Q: Is the check result normal?
1. YES: Go to Step 4.
2. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 4. Check of short to power supply, short to ground, and open circuit in IG1A line between SRS-ECU and ETACS-ECU.
Q: Is the check result normal?
1. YES: Go to Step 5.
2. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 5. Trouble symptom check.
Q: Is the communication between scan tool and SRS-ECU possible?
1. YES: Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
2. NO: Replace SRS-ECU (Refer to SRS CONTROL UNIT (SRS-ECU) ).