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Inspection Procedure 1: Check the camera-ECU power supply circuit.
 
 
 
 
TECHNICAL DESCRIPTION (COMMENT)
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
  • Damaged harness wires and connectors
 
 
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 body 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 body 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 ground, and open circuit in +B line between camera-ECU 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. Voltage measurement at camera-ECU converter connector (ACC terminal).
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Check the voltage between camera-ECU connector (ACC terminal) and body ground.
OK: The voltage should measure approximately 12 volts (battery positive voltage)
Is the check result normal?
Go to Step 6.
Go to Step 5.
 
STEP 5. Check of short to ground, and open circuit in ACC line between fusible link and camera-ECU connector.
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 6. 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 ).