DTC U3003:16, U3003:17 [FULL-AUTO AIR CONDITIONER]
id0702c1731000
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DTC U3003:16 |
Power supply circuit voltage below threshold (9.7 V or less (B+)) |
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DTC U3003:17 |
Power supply circuit voltage above threshold (16.4 V or more (B+)), (16.8 V or more (IG2, TNS)) |
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POSSIBLE CAUSE
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• Generator system malfunction
• ROOM 15 A fuse malfunction
• Battery malfunction
• Open or short circuit to ground in wiring harness between battery positive terminal and climate control unit terminal 2B.
• Climate control unit malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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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.
(See DTC TABLE [LF, L5].)
(See DTC TABLE [L3 Turbo].)
(See DTC TABLE [ZY, Z6].)
(See DTC TABLE [MZR-CD 2.2].)
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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 ROOM 15 A fuse.
• Is the fuse normal?
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Yes
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Install the ROOM 15 A fuse, then go to the next step.
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No
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Replace the ROOM 15 A fuse, then go to Step 6.
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3
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INSPECT BATTERY
• Inspect the battery.
(See BATTERY INSPECTION [LF, L5].)
(See BATTERY INSPECTION [ZY, Z6].)
• 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 6.
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4
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INSPECT CLIMATE CONTROL UNIT POWER SUPPLY CIRCUIT FOR SHORT CIRCUIT TO GROUND
• Disconnect the climate control unit connector.
• Inspect for continuity between climate control unit terminal 2B and body ground.
• Is there continuity?
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Yes
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Repair the wiring harness, then go to Step 6.
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No
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Go to the next step.
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5
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INSPECT CLIMATE CONTROL UNIT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
• Inspect for continuity between climate control unit terminal 2B 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 CLIMATE CONTROL UNIT
• Clear DTCs using the M-MDS.
• Perform the climate control unit DTC inspection using the M-MDS.
• Are DTCs U3003:16 or U3003:17 displayed?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction does not recur, go to the next step.
• If the malfunction recurs, replace the climate control unit.
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 THAT NO OTHER DTCs ARE PRESENT
• Verify other DTCs displayed.
• Are any other DTCs output?
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Yes
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Perform the corresponding DTC inspection.
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No
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DTC troubleshooting completed.
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