Nissan Rogue (T33) 2021-Present Service Manual: Ptc Heater

Nissan Rogue (T33) 2021-Present Service Manual / Ventilation, Heater & Air Conditioner :: Heater & Air Conditioning Control System / Manual Air Conditioning :: Dtc/circuit Diagnosis / Ptc Heater

Component Function Check

CHECK PTC HEATER OPERATION

  1. Start the engine.

  2. Operate front blower motor.

  3. Operate temperature control dial to full hot position.

  4. Check for warm air at discharge air outlet.

    NOTE:

    • Engine must be cold.

    • Battery must be charged.

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK FUSE AND FUSIBLE LINKS

  1. Ignition switch OFF.

  2. Check that the following fuse and fusible links are not blown (open).

    Unit Location Fuse and fusible link No. Capacity
    PTC heater relay Fuse block (J/B) 9 10 A
    Fuse and fusible link box 3 104 30 A
    105
    106

Is the fuse and fusible links blown (open)?

YES>>

Replace the blown (open) fuse and fusible links after repairing the affected circuit if a fuse and fusible links are blown (open).

NO>>

GO TO 2.

CHECK PTC HEATER RELAY POWER SUPPLY

  1. Remove PTC heater relay.

  2. Ignition switch ON.

  3. Check voltage between PTC heater relay 1, PTC heater relay 2, and PTC heater relay 3 harness connector and ground.

    PTC heater relay 1
    (+) (−) Voltage
    PTC heater relay 1
    Connector Terminal
    E80 6 Ground Battery voltage
    9
    PTC heater relay 2 and PTC heater relay 3
    Relay (+) (−) Voltage
    PTC heater relay 2 and PTC heater relay 3
    Connector Terminal
    2 E81 1 Ground Battery voltage
    4
    3 6
    9

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair the PTC heater relay power supply circuit.

CHECK PTC HEATER RELAY CONTROL SIGNAL CIRCUIT FOR OPEN

  1. Ignition switch OFF.

  2. Disconnect BCM connector.

  3. Check continuity between PTC heater relay 1, PTC heater relay 2, and PTC heater relay 3 harness connector and BCM harness connector.

    PTC heater relay 1
    PTC heater relay 1 BCM Continuity
    Connector Terminal Connector Terminal
    E80 8 With type A meter: E60 118 Yes
    With type B meter: E29 125
    PTC heater relay 2 and PTC heater relay 3
    PTC heater relay 2 and PTC heater relay 3 BCM Continuity
    Relay Connector Terminal Connector Terminal
    2 E81 3 With type A meter: E60 117 Yes
    With type B meter: E29 127
    3 8 With type A meter: E60 121
    With type B meter: E29 126

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair harness or connector.

CHECK PTC HEATER POWER SUPPLY CIRCUIT FOR OPEN

Check continuity between PTC heater relay 1, PTC heater relay 2, and PTC heater relay 3 harness connector and PTC heater harness connector.

PTC heater relay 1
PTC heater relay 1 PTC heater Continuity
Connector Terminal Connector Terminal
E80 7 E77 3 Yes
PTC heater relay 2 and PTC heater relay 3
PTC heater relay 2 and PTC heater relay 3 PTC heater Continuity
Relay Connector Terminal Connector Terminal
2 E81 2 E77 4 Yes
3 7 5

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair harness or connector.

CHECK PTC HEATER GROUND CIRCUIT FOR OPEN

Check continuity between PTC heater harness connector and ground.

PTC heater (–) Continuity
Connector Terminal
E78 1 Ground Yes
2

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair harness or connector.

CHECK PTC HEATER RELAY

Check PTC heater relay. Refer to Component Inspection (PTC Heater Relay).

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Replace malfunctioning PTC heater relay.

CHECK PTC HEATER

Check PTC heater. Refer to Component Inspection (PTC Heater).

Is the inspection result normal?

YES>>

Replace BCM. Refer to Removal and Installation.

NO>>

Replace PTC heater. Refer to Removal and Installation.

Component Inspection (PTC Heater Relay)

CHECK PTC HEATER RELAY

  1. Ignition switch OFF.

  2. Disconnect PTC heater relay connector.

  3. Check continuity between PTC heater relay 1 terminals 6 and 7 when the voltage is supplied between terminals 8 and 9.

    PTC heater relay 1 Condition Continuity
    Terminal
    6 7 Battery voltage Apply Yes
    Not apply No

  4. Check continuity between PTC heater relay 2 terminals 1 and 2 when the voltage is supplied between terminals 3 and 4.

    PTC heater relay 2 Condition Continuity
    Terminal
    1 2 Battery voltage Apply Yes
    Not apply No

  5. Check continuity between PTC heater relay 3 terminals 6 and 7 when the voltage is supplied between terminals 8 and 9.

    PTC heater relay 3 Condition Continuity
    Terminal
    6 7 Battery voltage Apply Yes
    Not apply No

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace malfunctioning PTC heater relay.

Component Inspection (PTC Heater)

CHECK PTC HEATER

  1. Ignition switch OFF.

  2. Check resistance between PTC heater terminals.

Terminal Resistance (Ω)
3 1 Except 0 or ∞
4 1 and 2
5 2

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace PTC heater. Refer to Removal and Installation.

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