2003 Toyota PriusFACTORY OEM SERVICE PROCEDURE

Shift Lock System: Inspection

  1. INSPECT SHIFT POSITION SENSOR 
    1. Remove the steering column upper cover and lower cover.
    2. Disconnect the shift position sensor connector.
    3. Check continuity between terminals shown below when the shift lever is moved to each position. TERMINALS CONTINUITY REFERENCE 
      TERMINALS CONTINUITY REFERENCE

      Shift Position Terminal No. to continuity Terminal No. to continuity
      P 1 - 2 3 - 8 - 9
      R 1 - 4 3 - 8 - 9
      N 1 - 5 3 - 8 - 9
      D 1 - 6 3 - 8 - 9
      B 1 - 7 3 - 8 - 9
      Fig 1: Identifying Shift Position Sensor Connector
      G03431185Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Connect the shift position sensor connector.
    5. Install the steering column upper cover and lower cover.
  2. INSPECT SHIFT LOCK CONTROL ECU 

    Using a voltmeter, measure the voltage at each terminal.

    HINT:

    Do not disconnect the ECU connector.

    Fig 2: Identifying Shift Lock Control ECU Connectors
    G03431186Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINALS VOLTAGE REFERENCE

    Terminal Measuring Condition Voltage (V)
    A, 1 - A, 5 (ACC - E) Ignition switch ACC 10 - 14
    A, 3 - A, 5 (IG - E) Ignition switch ON 10 - 14
    A, 6 - A, 5 (STP - E) Depressing brake pedal 10 - 14
    A, 4 - A, 5 (KLS+ - E)
    1. Ignition switch ACC and P position
    2. Ignition switch ACC and except P position
    3. Ignition switch ACC and except P position (After approx. 1 second)
    		 0
    7.5 - 11
    6 - 9.5
    B, 1 - B, 5 (SLS+ - SLS-)
    1. Ignition switch ON and P position
    2. Depress brake pedal
    3. Except P position
    		 0
    8 - 13.5
    0
    B, 2 - B, 4 (P1 - P)
    1. Ignition switch ON, P position and depress brake pedal
    2. Shift except P position under conditions above
    		 0
    9 - 13.5
    B, 6 - B, 4 (P2 - P)
    1. Ignition switch ACC, P position
    2. Shift except P position under conditions above
    		 9 - 13.5
    0
  3. INSPECT SHIFT LOCK SOLENOID 
    1. Disconnect the solenoid connector.
    2. Using an ohmmeter, measure the resistance between terminals.

      Standard resistance: 29 - 35 W 

      If the resistance value is not as specified, replace the solenoid.

      Fig 3: Measuring Resistance Between Shift Lock Solenoid Connectors Terminals Using Ohmmeter
      G03431187Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Apply battery positive voltage between terminals. Check the operation.

      If the solenoid does not operate, replace the solenoid noise can be heard from the solenoid.

      Fig 4: Applying Battery Positive Voltage Between Terminals
      G03431188Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT KEY INTERLOCK SOLENOID 
    1. Disconnect the solenoid connector.
    2. Using an ohmmeter, measure the resistance between terminals 3 and 4.

      Standard resistance:  12.5 - 16.5 W

      If the resistance value is not as specified, replace the solenoid.

      Fig 5: Measuring Resistance Between Terminals 3 & 4
      G03431189Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Apply battery positive voltage between the terminals 3 and 4. Check that an operation sound can be heard from the solenoid.

      If the solenoid does not operate, replace the solenoid.

      Fig 6: Applying Voltage Between Terminals 3 & 4
      G03431190Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT SHIFT LOCK CONTROL SWITCH 

    Check that there is continuity between terminals.

    TERMINALS CONTINUITY REFERENCE

    Shift position Tester connection Standard
    P position A, 5 - B, 2 (E - P1) Continuity
    P position (Pull the shift lever toward you) A, 5 - B, 2 (E - P1)
    A, 5 - B, 6 (E - P2)    		 Continuity
    R, N, D, 2, L position A, 5 - B, 6 (E - P2) Continuity
    Fig 7: Identifying Shift Lock Control Switch Connectors
    G03431191Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If continuity is not identified, replace the switch.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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