Nissan Rogue (T33) 2021-Present Service Manual: Dtc/circuit Diagnosis :: U1ca9-02 Rear Seat Heater Lh Communication

Nissan Rogue (T33) 2021-Present Service Manual / Body Interior :: Seat / Dtc/circuit Diagnosis :: U1ca9-02 Rear Seat Heater Lh Communication

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content) 		DTC detection condition
U1CA9-02

REAR SEAT HEATER LH COMMUNICATION

(Rear seat heater LH communication) 		Diagnosis condition Engine running
Signal (terminal) LIN (heated seat) signal (terminal #45)
Threshold A/C amp. is not transmitting or receiving LIN communication with rear seat heater LH
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Fuse

  • Harness or connectors (rear seat heater LH circuit is open or short to ground)

  • Seat cushion heater LH

  • A/C amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. Start the engine.

  2. Select “Self diagnosis result” mode of “HVAC”.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK FUSE

  1. Ignition switch OFF.

  2. Check that the following fuse is not blown (open):

    Unit Location Fuse No. Capacity
    Ignition switch power supply Fuse block (J/B) 66 30A

Is the fuse blown (open)?

YES>>

Replace the blown (open) fuse after repairing the affected circuit if a fuse is blown (open).

NO>>

GO TO 2.

CHECK REAR SEAT HEATER LH POWER SUPPLY VOLTAGE

  1. Disconnect rear seat heater LH connector.

  2. Start the engine.

  3. Check voltage between rear seat heater LH harness connector and ground.

    + —

    Voltage

    (Approx.)
    Rear seat heater LH
    Connector Terminal
    B405 1 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair the harness or connector.

CHECK REAR SEAT HEATER LH GROUND CIRCUIT (OPEN)

  1. Ignition switch OFF.

  2. Check continuity between rear seat heater LH harness connector and ground.

    Rear seat heater LH — Continuity
    Connector Terminal
    B405 2 Ground Yes

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair the harness or connector.

CHECK REAR SEAT HEATER LH LIN SIGNAL

  1. Ignition switch ON.

  2. Confirm output waveform between rear seat heater LH harness connector and ground with oscilloscope.

    + – Output waveform
    Rear seat heater LH
    Connector Terminal
    B405 3 Ground

Is the inspection result normal?

YES>>

Replace seat cushion heater LH. Refer to Disassembly and Assembly.

NO>>

GO TO 5.

CHECK REAR SEAT HEATER LH LIN SIGNAL CIRCUIT (OPEN)

  1. Ignition switch OFF.

  2. Disconnect A/C amp. connector.

  3. Check continuity between rear seat heater LH harness connector and A/C amp. harness connector.

    Rear seat heater LH A/C amp. Continuity
    Connector Terminal Connector Terminal
    B405 3 M55 45 Yes

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair the harness or connector.

CHECK REAR SEAT HEATER LH LIN SIGNAL CIRCUIT (SHORT TO GROUND)

  1. Disconnect following connectors:

    • Front seat heater LH

    • Front seat heater RH

    • Rear seat heater RH

  2. Check continuity between rear seat heater LH harness connector and ground.

    Rear seat heater LH — Continuity
    Connector Terminal
    B405 3 Ground No

Is the inspection result normal?

YES>>

Replace A/C amp. Refer to Removal and Installation.

NO>>

Repair the harness or connector.

    Dtc/circuit Diagnosis. U1ca8-02 Rear Seat Heater Rh Communication
    DTC Description DTC DETECTION LOGIC DTC No. CONSULT screen items (Trouble diagnosis content) DTC detection condition U1CA8-02 REAR SEAT HEATER RH COMMUNICATION (Rear seat heater...
    Dtc/circuit Diagnosis. Front Seat Heater Lh
    Component Function Check CHECK FRONT SEAT HEATER LH FUNCTION Start the engine. Check that seat cushion and seat back of front seat LH warms when operating front seat heater swit...

    Other materials:

    P14a5 Charge Air Cooler Cooling Electric Water Pump
    DTC Description DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble diagnosis content) DTC detection condition P14A5 Charge air cooler coolant pump (Charge air cooler coolant pump control circuit high) Diagnosis condition Engine running at idle Warm-up condition ...

    P0264 Fuel Injector (cylinder 2)
    DTC Description DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble diagnosis content) DTC detection condition P0264 00 CYL2 INJECTOR (Cylinder 2 Injector "A" Circuit Low) Diagnosis condition — Signal (terminal) — Threshold Direct injector driver uni ...

    Dtc/circuit Diagnosis. Horn Function
    Component Function Check CHECK FUNCTION CONSULT Ignition switch OFF. Perform “Horn” in “Active test” mode of “IPDM E/R”. Check the horn operation. Test item Description Horn On Horn Sounds (for 20 ms.) Is the operation normal? YES>> Ins ...