Diagnosis Procedure

Diagnosis Procedure

1. CHECK HARNESS CONNECTOR

   1. Ignition switch OFF.

   2. Check the mating condition of TCM harness connector and CVT unit harness connector.

   Is the inspection result normal?

   YES >>

   GO TO 2.

   NO >>

   Repair or replace damaged parts.

2. CHECK CONNECTOR TERMINAL

   1. Disconnect TCM harness connector and CVT unit harness connector.

   2. Check the connectors of TCM and CVT unit for water intrusion, or damage or corrosion of the terminals.

   Is the inspection result normal?

   YES >>

   GO TO 3.

   NO >>

   Repair or replace damaged parts.

3. CHECK DETECTED DTC

   Are other sensor malfunctions detected in addition to primary pressure sensor?

   YES >>

   GO TO 4.

   NO >>

   GO TO 10.

4. CHECK SENSOR GROUND CIRCUIT - 1

   1. Connect TCM harness connector.

   2. Check continuity (resistance) between CVT unit harness connector terminal and ground.

      CVT unit		—	Continuity (Resistance)
      Connector	Terminal
      F46	18	Ground	Existed (1 Ω or less)

   Is the inspection result normal?

   YES >>

   GO TO 6.

   NO >>

   GO TO 5.

5. CHECK SENSOR GROUND CIRCUIT - 2

   1. Disconnect TCM harness connector.

   2. Check continuity (resistance) between TCM harness connector terminal and CVT unit harness connector terminal.

      TCM		CVT unit		Continuity (Resistance)
      Connector	Terminal	Connector	Terminal
      F23	15	F46	18	Existed (1 Ω or less)

   Is the inspection result normal?

   YES >>

   GO TO 6.

   NO >>

   Repair harness or connector.

6. CHECK SENSOR POWER SUPPLY CIRCUIT - 1

   1. If TCM harness connector is disconnected, connect it.

   2. Ignition switch ON.

   3. Check voltage between CVT unit harness connector terminal and ground.

      +		−		Voltage (Approx.)
      CVT unit
      Connector	Terminal
      F46	22	Ground		5 V

   Is the inspection result normal?

   YES >>

   GO TO 10.

   NO >>

   GO TO 7.

7. CHECK SENSOR POWER SUPPLY CIRCUIT - 2

   1. Ignition switch OFF.

   2. Disconnect TCM harness connector.

   3. Check continuity (resistance) between TCM harness connector terminal and CVT unit harness connector terminal.

      TCM		CVT unit		Continuity (Resistance)
      Connector	Terminal	Connector	Terminal
      F23	26	F46	22	Existed (1 Ω or less)

   Is the inspection result normal?

   YES >>

   GO TO 8.

   NO >>

   Repair harness or connector.

8. CHECK SENSOR POWER SUPPLY CIRCUIT - 3

   1. Ignition switch ON.

   2. Check voltage between TCM harness connector terminal and ground.

      +		−	Voltage (Approx.)
      TCM
      Connector	Terminal
      F23	26	Ground	0 V

   Is the inspection result normal?

   YES >>

   GO TO 9.

   NO >>

   Repair harness.

9. CHECK TCM POWER SUPPLY AND GROUND CIRCUITS

   Check TCM power supply and ground circuits. Refer to Diagnosis Procedure.

   Is the inspection result normal?

   YES >>

   INSPECTION END

   NO >>

   Repair or replace damaged parts.

10. CHECK PRIMARY PRESSURE SENSOR SIGNAL CIRCUIT

    Check continuity (resistance) between TCM harness connector terminal and CVT unit harness connector terminal.

    TCM		CVT unit		Continuity (Resistance)
    Connector	Terminal	Connector	Terminal
    F23	17	F46	13	Existed (1 Ω or less)

    Is the inspection result normal?

    YES >>

    GO TO 11.

    NO >>

    Repair harness or connector.

11. CHECK TCM INPUT SIGNAL (PRIMARY PRESSURE SENSOR SIGNAL)

    1. Connect TCM harness connector and CVT unit harness connector.

    2. Start the engine.

    3. Check voltage between TCM harness connector terminal and ground.

       +		−	Test condition	Voltage (Approx.)
       TCM
       Connector	Terminal
       F23	17	Ground	After engine warm up Shift position: “N” position At idle	0.867 V

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Replace control valve due to primary pressure sensor malfunction. Refer to Removal and Installation.