LEMON Manuals: Even more car manuals for everyone
Home >> Infiniti >> 2016 >> Q50 Base, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 123 (Hybrid Motor System (Diagnostic Trouble Codes (DTCS) P2122-P31FF And Circuit Diagnosis) (Hybrid)) >> DTC / Circuit Diagnosis >> DTC P2519: A/C Request >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
CAUTION:

ELECTRIC_SHOCK Since hybrid vehicles and electric vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:
  • Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.
  • The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.
  • Be sure to wear insulating protective equipment before beginning work on the high voltage system.
  • Never allow workers other than the responsible person to touch the vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them.
  • Refer to HIGH VOLTAGE PRECAUTIONS .
CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Information. A malfunction may occur if this is not observed.

  1. CHECK DTC PRIORITY

    If DTC P2519 is displayed with DTC UXXXX, or P31A9, first perform the confirmation procedure (trouble diagnosis) for DTC UXXXX, or P31A9.

    Is applicable DTC detected?

    YES 

    Perform diagnosis of applicable. Refer to DTC INDEX .

    NO 

    GO TO STEP 2  .

  2. CHECK DTC WITH LI-ION BATTERY CONTROLLER

    Perform self - diagnosis of Li-ion battery controller. Refer to CONSULT FUNCTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Perform trouble shooting relevant to DTC indicated. Refer to DTC INDEX .

  3. PRECONDITIONING

    WARNING:

    Follow the instructions below before starting the procedure.

    1. Disconnect high voltage circuit. Refer to HOW TO DISCONNECT HIGH VOLTAGE .
    2. Check voltage in high voltage circuit. Refer to CHECK VOLTAGE IN HIGH VOLTAGE CIRCUIT .

    GO TO STEP 4  .

  4. CHECK FUSE

    1. Turn ignition switch OFF.
    2. Check that the following fuse is not blowing.
      Location Fuse No. Capacity
      Fuse and fusible link block No. 1 #87 10 A

    Is the fuse blown (open) ?

    YES 

    Replace the fuse after repairing the applicable circuit.

    NO 

    GO TO STEP 5  .

  5. CHECK DC/DC CONVERTER POWER SUPPLY

    1. Disconnect Li-ion battery harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between Li-ion battery harness connector and ground.
    + - Voltage
    Li - ion battery
    Connector Terminal
    T28 8 Ground Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    GO TO STEP 6  .

  6. CHECK DC/DC CONVERTER POWER SUPPLY CIRCUIT-1

    1. Turn ignition switch OFF.
    2. Check the continuity between Li-ion battery harness connector and fuse and fusible link block No. 1.
      + - Continuity
      Li - ion battery Fuse and fusible link block No. 1
      Connector Terminal Connector Fuse No.
      T28 8 T19 #87 Existed
    3. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES 

    Perform trouble diagnosis for power supply.

    NO 

    Repair or replace error-detected parts.

  7. CHECK DC/DC CONVERTER POWER SUPPLY CIRCUIT-2

    1. Turn ignition switch OFF.
    2. Disconnect DC/DC converter harness connector.
    3. Check the continuity between Li-ion battery controller harness connector and DC/DC converter harness connector.
      + - Continuity
      Li - ion battery DC/DC converter
      Connector Terminal Connector Terminal
      LB39 8 T101 1 Existed
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES 

    GO TO STEP 8  .

    NO 

    Repair or replace error-detected parts.

  8. CHECK DC/DC CONVERTER COOLING REQUEST SIGNAL CIRCUIT

    1. Disconnect Li-ion battery controller harness connector.
    2. Check the continuity between Li-ion battery controller harness connector and DC/DC converter harness connector.
      + - Continuity
      Li-ion battery controller DC/DC converter
      Connector Terminal Connector Terminal
      LB1 18 T101 5 Existed
    3. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES 

    Perform INTERMITTENT INCIDENT .

    NO 

    Repair or replace error-detected parts.

scientia non olet · About LEMON Manuals