Inspection Procedure
4: Check the WCM power supply and earth circuits.
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STEP 1. Connector check: C-33 WCM connector
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Q.
Is the check result normal?
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 Go to Step 2.
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 Repair the defective connector.
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STEP 2. Voltage measurement at the C-33 WCM connector.
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(1)Disconnect the connector and measure the resistance at the wiring harness side.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the voltage between the C-33 WCM connector terminals No. 6/9, and the
body earth.
OK: Battery voltage
Q.
Is the check result normal?
Go to Step 4.
Go to Step 3.
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STEP 3. Check the wiring harnesses between the C-33 WCM connector
terminal No. 6, 9 and the fusible link (36, 34).
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Before checking the wiring harnesses, check the joint connectors C-307, C-309, and C-317,
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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Go to Step 4.
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Repair the wiring harness.
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STEP 4. Resistance measurement at the C-33 WCM connector.
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(1)Disconnect the connector and measure the resistance at the wiring harness side.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the resistance between the C-33 WCM connector terminal No. 7 and the body
earth.
OK: Continuity exists (2 Ω
or less)
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Q.
Is the check result normal?
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The diagnosis is complete.
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Go to Step 5.
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STEP 5. Check the wiring harness between the C-33 WCM connector terminal
No. 7 and the body earth.
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- Check the earth wires for open circuit.
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Q.
Is the check result normal?
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The diagnosis is complete.
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Repair the wiring harness.
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