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Inspection Procedure 1: Check the camera-ECU power supply circuit.
 
 
 
 
COMMENT ON TROUBLE SYMPTOM
If the multi around monitor do not work at all, the power supply circuit or camera-ECU may have a problem.
 
 
TROUBLESHOOTING HINTS
  • The camera-ECU may be defective
  • The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
 
 
DIAGNOSIS
Required Special Tools:
  • MB991223: Harness Set
  • MB992006: Extra Fine Probe
STEP 1. Resistance measurement at camera-ECU connector (GND terminal).
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between the camera-ECU connector (GND terminal) and ground.
OK: The resistance should be 2 ohms or less
Is the check result normal?
Go to Step 2.
Repair the ground circuit.
 
STEP 2. Voltage measurement at camera-ECU connector (+B terminal)
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Check the voltage between the camera-ECU connector (+B terminal) and ground.
OK: The voltage should measure approximately 12 volts (battery positive voltage)
Is the check result normal?
: Go to Step 4.
Go to Step 3.
 
STEP 3. Check of short to power supply, short to ground, and open circuit in +B line between camera-ECU connector and fusible link.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the connector(s) or wiring harness.
 
STEP 4. Retest the system.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the camera-ECU (Refer to ).