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.
PROBABLE CAUSES
- Malfunction of camera-ECU
- Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. Resistance measurement at camera-ECU connector (GND terminal).
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Measure the resistance between the camera-ECU connector (GND terminal) and body earth.
OK: Continuity exists (2 Ω or less)
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Q.
Is the check result normal?
Go to Step 2.
Repair the earth circuit.
STEP 2. Voltage measurement at camera-ECU connector (+B terminal).
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Check the voltage between the camera-ECU connector (+B terminal) and body earth.
OK: System voltage
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Q.
Is the check result normal?
YES 
: Go to Step 4.
Go to Step 3.
STEP 3. Check of short to power supply, short to earth, and open circuit in +B line between camera-ECU connector and fusible link.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction 
).
Repair the connector(s) or wiring harness.
STEP 4. Retest the system.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the camera-ECU (Refer to ).