Inspection Procedure 1: Check the hands free module power supply circuit. < Vehicles with MMCS >: 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:

MB991223: Harness Set
MB992006: Extra Fine Probe

STEP 1. Resistance measurement at hands free module connector (GND terminal).
1. Disconnect hands free module connector, and measure at the wiring harness side.
2. Check the continuity between GND terminal and ground.
  OK: The resistance should be 2 ohms or less
Q: Is the check result normal?
- YES: Go to Step 3
- NO: Go to Step 2
STEP 2. Check of open circuit in GND line between hands free module connector and ground.
Q: Is the check result normal?
- YES: The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
- NO: Repair the connector(s) or wiring harness.
STEP 3. Voltage measurement at hands free module connector (+B terminal).
1. Disconnect hands free module connector, and measure at the wiring harness side.
2. Measure the voltage between +B terminal and ground.
  OK: The voltage should measure approximately 12 volts (battery positive voltage).
Q: Is the check result normal?
- YES: Go to Step 5
- NO: Go to Step 4
STEP 4. Check of short to power supply, short to ground, and open circuit in +B line between fusible link and hands free module connector.
Q: Is the check result normal?
- YES: The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
- NO: Repair the connector(s) or wiring harness.
STEP 5. Voltage measurement at hands free module connector (ACC terminal).
1. Disconnect hands free module connector, and measure at the wiring harness side.
2. Turn the ignition switch to "ACC" position.
3. Measure the voltage between ACC terminal and ground.
  OK: The voltage should measure approximately 12 volts (battery positive voltage).
Q: Is the check result normal?
- YES: Replace the hands free module.
- NO: Go to Step 6
STEP 6. Check of short to power supply, short to ground, and open circuit in ACC line between hands free module connector and multivision display connector.
Q: Is the check result normal?
- YES: Replace the multivision display.
- NO: Repair the connector(s) or wiring harness.