Inspection Procedure 8: The rear display does not change to nighttime brightness when the headlamps are illuminated.
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STEP 1. M.U.T.-III other system diagnosis code
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Check if diagnosis code is set to the combination meter.
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Q.
Is the diagnosis code set?
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 Troubleshoot the combination meter (Refer to  ).
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 Go to Step 2.
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STEP 2. M.U.T.-III other system diagnosis code
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Check if the diagnosis code is set to the ETACS-ECU.
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Q.
Is the check result normal?
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Troubleshoot the ETACS-ECU (Refer to Grup 54A -
ETACS -
Troubleshooting ).
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Go to Step 3.
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STEP 3. Connector check: C-03 combination meter connector
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Q.
Is the check result normal?
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Go to Step 4.
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Repair the connector concerned.
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STEP 4. Voltage measurement at C-03 combination meter connector
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the OFF position.
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(3)Measure the voltage between C-07 combination meter connector terminal No.24 and the body earth.
OK: Battery voltage
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Q.
Is the check result normal?
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Go to Step 6.
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Go to Step 5.
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STEP 5. Wiring harness check between C-317 ETACS-ECU connector terminal No.2 and C-07 combination meter connector terminal No.24
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- Check the power supply line for open circuit.
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Q.
Is the check result normal?
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Replace the ETACS-ECU.
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Repair the wiring harness.
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STEP 6. Check the wiring harness wires between C-03 combination meter connector terminal No.23 and D-06 rear display unit connector terminal No.5.
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Prior to the wiring harness inspection, check intermediate connector D-122, and repair if necessary.
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- Check the power supply line for open circuit.
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Q.
Is the check result normal?
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Replace the rear display unit.
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Repair the wiring harness.
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