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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1025 (Seats) >> With Climate Controlled Seats >> Component Diagnosis >> Power Supply And Ground Circuit >> Climate Controlled Seat Control Unit >> CLIMATE CONTROLLED SEAT CONTROL UNIT: Diagnosis Procedure

CLIMATE CONTROLLED SEAT CONTROL UNIT: Diagnosis Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUSES

    Check for blown fuses.

    FUSES SPECIFICATION

    System component Power Source Fuse or Fusible Link Location
    Climate controlled seat control unit Ignition switch ON or START 3 (10A) Fuse block (J/B)
    Battery 28 (15A) Fuse and fusible link box
    Battery H (40A) Fuse and fusible link box

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse or fusible link.

  2. CHECK BATTERY POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect climate controlled seat control unit connector B217.
    3. Check voltage between climate controlled seat control unit connector B217 terminal 29 and ground.
    VOLTAGE SPECIFICATION

    Connector Terminal Ground Voltage (Approx.)
    B217 29 - Battery voltage

    Is the inspection result normal? 

    YES: GO TO 3.

    NO: GO TO  6.

    Fig 1: Checking Voltage Between Climate Controlled Seat Control Unit Connector B217 Terminal 29 And Ground
    G05876205Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK IGNITION POWER SUPPLY CIRCUIT
    1. Disconnect climate controlled seat control unit connector B216.
    2. Check voltage between climate controlled seat control unit connector B216 terminal 21 and ground.
    VOLTAGE SPECIFICATION

    Connector Terminal Ground Ignition switch Voltage (Approx.)
    B216 21 - OFF 0 V
    ON Battery voltage
    START Battery voltage

    Is the inspection result normal? 

    YES: GO TO 4.

    NO: GO TO  5.

    Fig 2: Checking Voltage Between Climate Controlled Seat Control Unit Connector B216 Terminal 21 And Ground
    G05876206Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK GROUND CIRCUIT
    1. Turn ignition switch OFF.
    2. Check continuity between climate controlled seat control unit connector B217 terminal 30 and ground.
    CONTINUITY CHART

    Connector Terminal Ground Continuity
    B217 30 - Yes

    Is the inspection result normal? 

    YES: Inspection End.

    NO: Repair the harness or connectors.

    Fig 3: Checking Continuity Between Climate Controlled Seat Control Unit Connector B217 Terminal 30 And Ground
    G05876207Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK CLIMATE CONTROLLED SEAT RELAY

    Perform the climate controlled seat relay component inspection. Refer to "CLIMATE CONTROLLED SEAT CONTROL UNIT: COMPONENT INSPECTION (CLIMATE CONTROLLED SEAT RELAY) ".

    Is the inspection result normal? 

    YES: GO TO  8

    NO: Replace the climate controlled seat relay.

  6. CHECK CIRCUIT BREAKER POWER SUPPLY CIRCUIT
    1. Disconnect the circuit breaker connector M84.
    2. Check voltage between circuit breaker connector M84 terminal 1 and ground.
    VOLTAGE SPECIFICATION

    Connector Terminal Ground Voltage (Approx.)
    M84 1 - Battery voltage

    Is the inspection result normal? 

    YES: GO TO 7.

    NO: Repair the harness or connectors.

    Fig 4: Checking Voltage Between Circuit Breaker Connector M84 Terminal 1 And Ground
    G05876208Courtesy of NISSAN MOTOR CO., U.S.A.
  7. CHECK BATTERY POWER SUPPLY CIRCUIT FOR OPEN

    Check continuity between circuit breaker connector M84 (A) terminal 2 and climate controlled seat control unit connector B217 (B) terminal 29.

    CONTINUITY CHART

    Circuit Breaker Climate Controlled Seat Control Unit Continuity
    Connector Terminal Connector Terminal
    M84 (A) 2 B217 (B) 29 Yes

    Is the inspection result normal? 

    YES: Replace the circuit breaker.

    NO: Repair the harness or connectors.

    Fig 5: Checking Continuity Between Connector M84 Terminal 2 And Connector B217 Terminal 29
    G05876209Courtesy of NISSAN MOTOR CO., U.S.A.
  8. CHECK CLIMATE CONTROLLED SEAT RELAY BATTERY POWER SUPPLY CIRCUIT
    1. Disconnect climate controlled seat relay connector.
    2. Check voltage between climate controlled seat relay connector M58 terminal 3 and ground.
    VOLTAGE SPECIFICATION

    Connector Terminal Ground Voltage (Approx.)
    M58 3 - Battery voltage

    Is the inspection result normal? 

    YES: GO TO 9.

    NO: Repair the harness or connectors.

    Fig 6: Checking Voltage Between Climate Controlled Seat Relay Connector M58 Terminal 3 And Ground
    G05876210Courtesy of NISSAN MOTOR CO., U.S.A.
  9. CHECK CLIMATE CONTROLLED SEAT RELAY IGNITION POWER SUPPLY CIRCUIT

    Check voltage between climate controlled seat relay connector M58 terminal 2 and ground.

    VOLTAGE SPECIFICATION

    Connector Terminal Ground Ignition switch Voltage (Approx.)
    M58 2 - OFF 0 V
    ON Battery voltage
    START Battery voltage

    Is the inspection result normal? 

    YES: GO TO 10.

    NO: Repair the harness or connectors.

    Fig 7: Checking Voltage Between Climate Controlled Seat Relay Connector M58 Terminal 2 And Ground
    G05876211Courtesy of NISSAN MOTOR CO., U.S.A.
  10. CHECK IGNITION POWER SUPPLY CIRCUIT FOR OPEN

    Check continuity between climate controlled seat relay connector M58 (A) terminal 5 and climate controlled seat control unit connector B216 (B) terminal 21.

    CONTINUITY CHART

    Climate Controlled Seat Relay Climate Controlled Seat Control Unit Continuity
    Connector Terminal Connector Terminal
    M58 (A) 5 B216 (B) 21 Yes

    Is the inspection result normal? 

    YES: GO TO 11.

    NO: Repair the harness or connectors.

    Fig 8: Checking Continuity Between Seat Relay Connector M58 Terminal 5 And Seat Control Unit Connector B216 Terminal 21
    G05876212Courtesy of NISSAN MOTOR CO., U.S.A.
  11. CHECK CLIMATE CONTROLLED SEAT RELAY GROUND CIRCUIT

    Check continuity between climate controlled seat relay connector M58 terminal 1 and ground.

    CONTINUITY CHART

    Connector Terminal Ground Continuity
    M58 1 - Yes

    Is the inspection result normal? 

    YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    NO: Repair the harness or connectors.

    Fig 9: Checking Continuity Between Climate Controlled Seat Relay Connector M58 Terminal 1 And Ground
    G05876213Courtesy of NISSAN MOTOR CO., U.S.A.
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