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Home >> Toyota >> 2005 >> Prius >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Transmission Control System (Parking Lock Control) - Diagnostics >> Shift Control System (Parking Lock Control) >> DTC C2300: Act System Malfunction >> Inspection Procedure
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Inspection Procedure

  1. CHECK OTHER DTC OUTPUT (BESIDES DTC C2300) 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the hand-held tester on.
    4. Read the DTCs.

    Result: 

    DTC OUTPUT RESULT

    Display (DTC output) Proceed to
    No output A
    C2304, C2305, C2306 and C2318 B

    HINT:

    If any other codes besides C2300 are output, perform the troubleshooting for those DTCs first.

    1. B: REPAIR CIRCUIT INDICATED BY OUTPUT CODE 
    2. A: GO TO NEXT STEP 
  2. INSPECT TRANSMISSION CONTROL ECU ASSY (VC, RA, RB, RZ1, E2 TERMINAL) 
    1. Measure the voltage according to the value (s) in the table below.

    Standard: 

    TRANSMISSION CONTROL ECU ASSY (VC, RA, RB, RZ1, E2 TERMINAL) SPECIFIED CONDITIONS

    Tester connection (Symbols) Condition Specified condition
    T4-4 (RZ1)-T4-16 (E2) Power switch on (IG) 4 to 5.5 V
    T4-5 (RB)-T4-16 (E2) Power switch on (IG) 4 to 5.5 V
    T4-6 (RA)-T4-16 (E2) Power switch on (IG) 4 to 5.5 V
    T4-17 (VC)-T4-16 (E2) Power switch on (IG) 4 to 5.5 V
    Fig 1: Inspecting Transmission Control ECU Assy (VC, RA, RB, RZ1, E2 Terminal)
    G02620749Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: Go to step   5 
    2. NG: GO TO NEXT STEP 
  3. CHECK HARNESS AND CONNECTOR (SHIFT CONTROL ACTUATOR ASSY - TRANSMISSION CONTROL ECU ASSY) 
    1. Disconnect the T4 connector from the transmission control ECU assy.
    2. Disconnect the S1 connector from the shift control actuator assy.
    3. Measure the resistance according to the value (s) in the table below.

    Standard: 

    SHIFT CONTROL ACTUATOR ASSY - TRANSMISSION CONTROL ECU ASSY SPECIFIED CONDITIONS

    Tester connection (Symbols) Condition Specified condition
    T4-17 (VC)-S1-9 (RVC) Always Below 1 Ω
    T4-5 (RB)-S1-3 (RB) Always Below 1 Ω
    T4-6 (RA)-S1-5 (RA) Always Below 1 Ω
    T4-4 (RZ1)-S1-4 (RZ1) Always Below 1Ω
    T4-16 (E2)-S1-8 (RE2) Always Below 1Ω
    T4-4 (RZ1)-Body ground Always 10 kΩ or higher
    T4-5 (RB) - Body ground Always 10 kΩ or higher
    T4-6 (RA) - Body ground Always 10kΩ or higher
    T4-17 (VC)-Body ground Always 10 kΩ or higher
    Fig 2: Checking Harness And Connector (Shift Control Actuator Assy - Transmission Control ECU Assy)
    G02620750Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 
  4. INSPECT TRANSMISSION CONTROL ECU ASSY (E01, E02 TERMINAL) 
    1. Measure the resistance according to the value (s) in the table below.

    Standard: 

    TRANSMISSION CONTROL ECU ASSY (E01, E02 TERMINAL) SPECIFIED CONDITIONS

    Tester Connection (Symbols) Condition Specified Condition
    T4-2 (E02) - Body ground Always Below 1 Ω
    T4-3 (E01) - Body ground Always Below 1 Ω
    Fig 3: Inspecting Transmission Control ECU Assy (E01, E02 Terminal)
    G02620751Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: Go to step   14 
    2. NG: GO TO NEXT STEP 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  5. INSPECT SHIFT CONTROL ACTUATOR ASSY (MGNA TERMINAL) 
    1. Disconnect the S1 connector from the shift control actuator assy.
    2. Measure the voltage according to the value (s) in the table below.

    Standard: 

    SHIFT CONTROL ACTUATOR ASSY (MGNA TERMINAL) SPECIFIED CONDITIONS

    Tester Connection (Symbols) Condition Specified Condition
    S1-2 (MGNA)-Body ground Power switch on (IG) 9 to 14 V
    Fig 4: Inspecting Shift Control Actuator Assy (MGNA Terminal)
    G02620752Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step   7 
    2. OK: GO TO NEXT STEP 
  6. READ VALUE ON HAND-HELD TESTER 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the hand-held tester on.
    4. Select the item below in the DATA LIST, and read its value displayed on the hand-held tester.
      DATA LIST

      Item Measurement Item/Range (Display) Normal Condition
      U VOL VAL U phase voltage value/min: 0 V, max: 20 V Actual U phase voltage 9 to 14 V
      V VOL VAL V phase voltage value/min: 0 V, max: 20 V Actual V phase voltage 9 to 14 V
      W VOL VAL W phase voltage value/min: 0 V, max: 20 V Actual W phase voltage 9 to 14 V

    Standard: 

    Voltage: 9 to 14 V 

    1. NG: Go to step   13 
    2. OK: GO TO NEXT STEP 

    REPLACE TRANSMISSION CONTROL ECU ASSY 

  7. INSPECT FUSE (P CON MTR FUSE) 
    1. Remove the P CON MTR fuse from the engine room R/B and J/B.
    2. Check for continuity of the P CON MTR fuse.
      Fig 5: Identifying Location Of P CON MTR Fuse
      G02620753Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: Continuity 

    1. NG: INSPECT FOR SHORT IN ALL COMPONENTS CONNECTED TO FUSE AND REPAIR OR REPLACE THEM IF NEEDED, AND REPLACE FUSE 
    2. OK: GO TO NEXT STEP 
  8. INSPECT TRANSAXLE PARKING LOCK CONTROL RELAY 
    1. Remove the P CON relay from the engine room R/B and J/B.
    2. Measure the resistance according to the value (s) in the table below.

    Standard: 

    TRANSAXLE PARKING LOCK CONTROL RELAY SPECIFIED CONDITIONS

    Tester Connection Specified Condition
    3-5 10kΩ or higher
    3-5 Below 1 Ω (When battery voltage is applied to terminals 1 and 2)
    Fig 6: Inspecting Transaxle Parking Lock Control Relay
    G02620754Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE TRANSAXLE PARKING LOCK CONTROL RELAY 
    2. OK: GO TO NEXT STEP 
  9. CHECK HARNESS AND CONNECTOR (SHIFT CONTROL ACTUATOR ASSY - TRANSAXLE PARKING LOCK CONTROL RELAY) 
    1. Measure the resistance according to the value (s) in the table below.

    Standard: 

    SHIFT CONTROL ACTUATOR ASSY - TRANSAXLE PARKING LOCK CONTROL RELAY SPECIFIED CONDITIONS

    Tester connection (Symbols) Condition Specified Condition
    S1-2 (MGNA)-5 (P CON Relay) Always Below 1 Ω
    S1-2 (MGNA)-Body ground Always 10 k Ω or higher
    Fig 7: Checking Harness And Connector (Shift Control Actuator Assy - Transaxle Parking Lock Control Relay)
    G02620755Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 
  10. CHECK HARNESS AND CONNECTOR (TRANSAXLE PARKING LOCK CONTROL RELAY - P CON MTR FUSE) 
    1. Measure the resistance according to the value (s) in the table below.

      Standard: 

      TRANSAXLE PARKING LOCK CONTROL RELAY - P CON MTR FUSE SPECIFIED CONDITIONS

      Tester connection (Symbols) Condition Specified condition
      3 (P CON Relay) - 2 (P CON MTR Fuse) Always Below 1 Ω
      3 (P CON Relay) - Body ground Always 10 kΩ or higher
      Fig 8: Checking Harness And Connector (Transaxle Parking Lock Control Relay - P CON MTR Fuse)
      G02620756Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK:GO TO NEXT STEP 
  11. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU ASSY - TRANSAXLE PARKING LOCK CONTROL RELAY) 
    1. Disconnect the T4 connector from the transmission control ECU assy.
    2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      TRANSMISSION CONTROL ECU ASSY - TRANSAXLE PARKING LOCK CONTROL RELAY SPECIFIED CONDITIONS

      Tester Connection (Symbols) Condition Specified condition
      T4-14 (BMA)- 2 (P CON MTR Fuse) Always Below 1Ω
      T4-14 (BMA) - Body ground Always 10 kΩ or higher
      Fig 9: Checking Harness And Connector (Transmission Control ECU Assy - Transaxle Parking Lock Control Relay)
      G02620757Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 
  12. CHECK HARNESS AND CONNECTOR (TRANSAXLE PARKING LOCK CONTROL RELAY - BODY GROUND) 
    1. Measure the resistance according to the value (s) in the table below.

      Standard: 

      TRANSAXLE PARKING LOCK CONTROL RELAY - BODY GROUND SPECIFIED CONDITIONS

      Tester Connection (Symbols) Condition Specified condition
      1 (P CON Relay) - Body ground Always Below 1 Ω
      Fig 10: Checking Harness And Connector (Transaxle Parking Lock Control Relay - Body Ground)
      G02620758Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (P CON MTR FUSE - BATTERY) 

  13. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU ASSY - SHIFT CONTROL ACTUATOR ASSY) 
    1. Disconnect the T4 connector from the transmission control ECU assy.
    2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      TRANSMISSION CONTROL ECU ASSY - SHIFT CONTROL ACTUATOR ASSY SPECIFIED CONDITIONS

      Tester Connection (Symbols) Condition Specified condition
      T4-10 (MWA)-S1-1 (MWA) Always Below 1 Ω
      T4-11 (MVA) - S1-6 (MVA) Always Below 1Ω
      T4-12 (MUA)- S1-7 (MUA) Always Below 1Ω
      T4-10 (MWA)-Body ground Always 10 kΩ or higher
      T4-11 (MVA)-Body ground Always 10 kΩ or higher
      T4-12 (MUA)-Body ground Always 10 kΩ or higher
      Fig 11: Checking Harness And Connector (Transmission Control ECU Assy - Shift Control Actuator Assy)
      G02620759Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 
  14. INSPECT SHIFT CONTROL ACTUATOR ASSY 
    1. Remove the 3 bolts and transmission case cover.
    2. Remove the 3 bolts.
    3. Slightly pull the shift control actuator assy from the hybrid vehicle transaxle so that the shift control actuator assy can be turned.
    4. Turn the shift control actuator assy.
      Fig 12: Inspecting Shift Control Actuator Assy
      G02620760Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: 

    The shift control actuator turns smoothly. 

    HINT:

    There may be an internal actuator abnormality if the actuator does not turn smoothly.

    1. NG: REPLACE SHIFT CONTROL ACTUATOR ASSY (See  SHIFT CONTROL ACTUATOR ASSY  ) 
    2. OK: GO TO NEXT STEP 

    REPLACE TRANSMISSION CONTROL ECU ASSY 

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