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1
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INSPECT PCM DTC (INSPECT GENERATOR CIRCUIT)
• Switch the ignition to off.
• Connect the M-MDS to the DLC-2.
• Perform the PCM DTC inspection using the M-MDS.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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Go to the next step.
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2
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INSPECT FUSE
• Switch the ignition to off.
• Disconnect the negative battery cable.
• Remove the AUX HEATER 20 A fuse.
• Is the fuse normal?
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Yes
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Install the AUX HEATER 20 A fuse, then go to the next step.
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No
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Replace the AUX HEATER 20 A fuse, then go to Step 7.
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3
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INSPECT BATTERY
• Is the battery normal?
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Yes
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Go to the next step.
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No
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Replace/charge the battery, then go to Step 7.
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4
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INSPECT WATER HEATER UNIT POWER SUPPLY CIRCUIT FOR SHORT CIRCUIT TO GROUND
• Disconnect the water heater unit connector.
• Inspect for continuity between water heater unit terminal 1A and body ground.
• Is there continuity?
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Yes
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Repair the wiring harness, then go to Step 7.
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No
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Go to the next step.
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5
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INSPECT WATER HEATER UNIT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
• Inspect for continuity between water heater unit terminal 1A and battery positive terminal.
• Is there continuity?
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Yes
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Go to the next step.
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No
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Repair the wiring harness, then go to the next step.
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6
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INSPECT WATER HEATER UNIT
• Perform the water heater system operation check.
• Clear DTCs using the M-MDS.
• Perform the water heater unit DTC inspection using the M-MDS.
• Are DTCs U3003:16 or U3003:17 displayed?
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Yes
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Replace the water heater unit, then go to the next step.
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No
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Go to the next step.
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7
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VERIFY AFTER REPAIR PROCEDURE
• Perform after repair procedure.
• Are any DTCs present?
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Yes
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Go to the applicable DTC troubleshooting.
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No
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Troubleshooting completed.
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