INSPECTION PROCEDURE 10: Blower motor 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.

STEP 1. Measure the voltage at blower relay connector.
1. Remove the relay, and measure at the junction block side.
2. Voltage between terminals 1, 4 and body ground.
  OK: System voltage
Q: Is the check result normal?
1. YES: Go to Step 3.
2. NO: Go to Step 2.
STEP 2. Check of open circuit in blower relay power supply line between blower relay connector and fusible link (5).
NOTE: Prior to the wiring harness inspection, check ETACS-ECU connector and repair if necessary.

Q: Is the check result normal?
1. YES: Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
2. NO: Repair the connector(s) or wiring harness.
STEP 3. Check of open circuit in blower motor line between blower motor connector terminal and blower relay.
NOTE: Prior to the wiring harness inspection, check ETACS-ECU connector and repair if necessary.

Q: Is the check result normal?
1. YES: Go to Step 4.
2. NO: Repair the connector(s) or wiring harness.
STEP 4. Retest the system.
Check that the blower motor is energized.

Q: Is the check result normal?
1. YES: Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
2. NO: Replace the ETACS-ECU.