Nissan Maxima Service and Repair Manual: DTC/circuit diagnosis

  • Power supply and ground circuit
  • CLIMATE CONTROLLED SEAT CONTROL UNIT CLIMATE CONTROLLED SEAT CONTROL UNIT : Diagnosis Procedure Regarding Wiring Diagram information, refer to SE-44, "Wiring Diagram". 1.CHECK FUSES 2.CHECK BATTERY POWER SUPPLY CIRCUIT Turn ignition switch OFF. Disconnect climate controlled seat control unit connector B217. Check voltage between climate controlled seat control unit connector B217 terminal 29 and ground.   3.CHECK IGNITION POWER SUPPLY CIRCUIT Disconnect climate controlled seat control unit connector B216. Check voltage between climate controlled seat control unit connector B216 terminal 21 and ground.   4.CHECK GROUND CIRCUIT Turn ignition switch OFF.

  • Climate controlled seat blower motor
  • Description Sends airflow to the seat cushion and seatback. Component Function Check 1.CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR FUNCTION Turn the climate controlled seat switch to the H (Heat) LO, MED, and HI positions and the C (Cool) LO, MED, and HI positions. Check that the climate controlled seat blower motor operates at low, medium and high speed. Diagnosis Procedure Regarding Wiring Diagram information, refer to SE-44, "Wiring Diagram". 1.CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR Perform climate controlled seat blower motor component inspection. Refer to SE-14, "Component Inspection (Climate Controlled Seat Blower Motor)". 2.

  • Seat cushion thermal electric device
  • Description Provides cooling and heat for the seat cushion. Component Function Check 1.CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE FUNCTION Turn the climate controlled seat switch to the H (Heat) HI position and check that the seat cushion thermal electric device operates correctly. Turn the climate controlled seat switch to the C (Cool) HI position and check that the seat cushion thermal electric device operates correctly. Diagnosis Procedure Regarding Wiring Diagram information, refer to SE-44, "Wiring Diagram". 1.CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE Perform thermal electric device component inspection for the seat cushion.

  • Seatback thermal electric device
  • Description Provides cooling and heat for the seatback. Component Function Check 1.CHECK SEATBACK THERMAL ELECTRIC DEVICE FUNCTION Turn the climate controlled seat switch to the H (Heat) HI position and check that the seatback thermal electric device operates correctly. Turn the climate controlled seat switch to the C (Cool) HI position and check that the seatback thermal electric device operates correctly. Diagnosis Procedure Regarding Wiring Diagram information, refer to SE-44, "Wiring Diagram". 1.CHECK SEATBACK THERMAL ELECTRIC DEVICE Perform thermal electric device component inspection for the seatback. Refer to SE-19, "Component Inspection (Thermal Electric Device)". 2.

  • Climate controlled seat switch
  • Description Provides inputs to the climate controlled seat control unit for climate controlled seat operation. Component Function Check 1.CHECK CLIMATE CONTROLLED SEAT SWITCH FUNCTION Turn the climate controlled seat switch to the H (Heat) LO, MED, and HI positions and the C (Cool) LO, MED, and HI positions. Check that the climate controlled seat operates at low, medium and high heat, and low, medium and high cool. Diagnosis Procedure Regarding Wiring Diagram information, refer to SE-44, "Wiring Diagram". 1.CHECK CLIMATE CONTROLLED SEAT SWITCH Perform climate controlled seat switch component inspection. Refer to SE-21, "Component Inspection (Climate Controlled Seat Switch)". 2.

  • Climate controlled seat switch indicator
  • Description Illuminates the climate controlled seat switch to indicate operating status. Component Function Check 1.CHECK CLIMATE CONTROLLED SEAT SWITCH INDICATOR FUNCTION Check that the indicators for the climate controlled seat switch operate in both COOL and HEAT modes. Diagnosis Procedure Regarding Wiring Diagram information, refer to SE-44, "Wiring Diagram". 1.CHECK CLIMATE CONTROLLED SEAT SWITCH INDICATOR Perform climate controlled seat switch indicator component inspection. Refer to SE-24, "Component Inspection (Climate Controlled Seat Switch Indicator)". 2.CHECK CLIMATE CONTROLLED SEAT SWITCH COOL INDICATOR CIRCUIT Turn ignition switch OFF.

System description

Power supply and ground circuit