SEAT WARMER IS DIFFICULT TO WARM UP [SEAT WARMER SYSTEM (US)]
SEAT WARMER IS DIFFICULT TO WARM UP [SEAT WARMER SYSTEM (US)]
SM2763800
id0903m20223r1
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Note
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• When the seat warmer switch is turned on with the ignition switched ON (engine on), the seat warmer system operates.
Outline
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Description
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• The seat warmer temperature does not reach the set temperature.
• The seat warmer temperature requires time to reach the set temperature.
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Possible cause
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• Connector or terminal malfunction of the following parts:
• Short to ground or open circuit in seat warmer unit signal circuit
• Seat warmer unit malfunction
• Seat warmer control unit malfunction
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Diagnostic Procedure
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Step |
Inspection |
Results |
Action |
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1
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VERIFY ALL SYSTEM DTCs
• Perform the DTC inspection. (See DTC INSPECTION.)
• Are any DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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Go to the next step.
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2
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INSPECT SEAT WARMER CONTROL UNIT AND SEAT WARMER UNIT CONNECTORS FOR MALFUNCTION
• Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.)
• Are the connector and terminal normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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3
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INSPECT SEAT WARMER UNIT SIGNAL CIRCUIT FOR SHORT TO GROUND AND OPEN CIRCUIT
• Inspect the signal circuit for a short to ground and open circuit. (See CIRCUIT INSPECTION.)
• Is the circuit normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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4
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INSPECT SEAT WARMER UNIT FOR MALFUNCTION
• Inspect the applicable part. (See SEAT WARMER UNIT INSPECTION [(US)].)
• Is the part normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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Repair completion verification
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VERIFY THAT VEHICLE IS REPAIRED
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Has the malfunction symptom been eliminated?
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Yes
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Complete the symptom troubleshooting. (Explain contents of repair to customer)
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No
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Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
• If the malfunction is not resolved, replace the seat warmer control unit. (See SEAT WARMER CONTROL UNIT REMOVAL/INSTALLATION [(US)].)
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