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Home › Toyota › 2004 › MR2 C56 › Repair and Diagnosis › Transmission › Manual Trans › Manual Trans Sequential - Diagnostics › DTC P0810: Clutch Position Control Error › Inspection Procedure

Inspection Procedure

NOTE: Read freeze frame data using hand-held tester or OBD II scan tool. Because freeze frame records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, etc. at the time of the malfunction.
  1. Check if there is any sequential transmission fluid leakage. 
    1. NG: Repair or replace ( GEAR SHIFT ACTUATOR  or  HYDRAULIC POWER UNIT  ). 
    2. OK: Go to next step 
  2. Connect hand-held tester, check accumulator pressure. 

    PREPARATION: 

    1. Turn the ignition switch ON.
    2. Start the engine and warm it up.
    3. Connect the hand-held tester to the DLC3.
    4. Fix the position at 1st gear.

    CHECK: 

    Read the accumulator pressure value using the hand-held tester.

    OK: 

    1. Pressure drops by approximately 3.5 bar per minute 

    1. NG: Replace HPU assembly. 
    2. OK: Go to next step 
  3. Check for open and short in harness and connector between clutch stroke sensor, clutch solenoid and transmission control ECU ( PROCEDURE  ). 
    1. NG: Repair or replace harness and connector. 
    2. OK: Go to next step 
  4. Connect hand-held tester, read value of clutch stroke sensor. 

    PREPARATION: 

    1. Turn the ignition switch ON.
    2. Stop the engine.
    3. Release the brake pedal.
    4. Connect the hand-held tester to the DLC3.

    CHECK: 

    Read the clutch stroke sensor value by using the hand-held tester.

    OK: 

    CLUTCH STROKE SENSOR VALUE

    Shift Lever Position Clutch Stroke Sensor Value
    N Approx. 30 mm (1.181 in.)
    S Approx. 20 mm (0.787 in.)
    1. OK: Go to step   6 
    2. NG: Go to next step 
  5. Check clutch solenoid. 
    Fig 1: Applying Battery +Ve Voltage Between 3 & 5 Of HPU Assy Connector
    G02914026Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    PREPARATION: 

    Disconnect the HPU connector.

    CHECK: 

    1. Apply battery positive voltage between terminals 3 and 5 of the HPU assembly connector and use a sound scope to check that there is normal operating sound of the clutch solenoid while it is operating.
    2. Measure the resistance of the terminals 3 and 5 of the HPU assembly connector.

    OK: 

      Fig 2: Measuring Resistance Of Terminals 3 & 5 Of HPU Assy Connector
      G02914027Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Operation: There is operating sound of the clutch solenoid. 
    2. Resistance: 5.32-5.88 Ω at 20°C (68°F) 

    1. NG: Replace HPU assembly. 
    2. OK: Go to next step 
  6. Inspect clutch stroke sensor. 
    Fig 3: Checking Voltage Of Clutch Stroke Sensor
    G02914028Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    PREPARATION: 

    Remove the clutch stroke sensor.

    CHECK: 

    Check the voltage of the clutch stroke sensor.

    1. Connect 3 dry cell batteries (1.5 V) in series.
    2. Connect the battery positive (+) wire to terminal A and the battery negative (-) wire to terminal C.
    3. Check the voltage between terminals C and B when moving the link.

    OK: 

    1. Voltage (Power source voltage at 4.5V): 

    POWER SOURCE VOLTAGE

    Sensor angle (degree) Terminal (C - B) output voltage (V)
    44.8 4.127-4.306
    135.5 0.185-0.364
    NOTE: Formula when the power source voltage has changed.

    (4V less than or equal to power source, less than or equal to 6V)

    POWER SOURCE VOLTAGE

    Sensor angle (degree) Output voltage (V)
    44.8 Power source x (0.937 +/- 0.02)
    135.5 Power source x (0.061 +/- 0.02)
    1. NG: Replace clutch stroke sensor. 
    2. OK: Go to next step 
  7. Replace HPU and GSA. 

    After replacing the HPU and GSA, check that the problem disappears.

    1. NG: Replace transmission control ECU. 
    2. OK: END. 

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