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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 465 (Automatic Transmission Electronic Controlled (ECT) - Diagnostics) >> Electronic Controlled Automatic Transaxle [ECT] (APR., 2003) >> DTC P0705, P0850: Transmission Range Sensor Circuit Malfunction (PRNDL Input) & Park/Neutral Switch Input Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT PARK/NEUTRAL POSITION SWITCH ASSY 
    1. Disconnect the park/neutral position switch connector.
    2. Measure resistance according to the value (s) in the table below when the shift lever is moved to each position.
    Fig 1: Disconnecting Park/Neutral Position Switch Connector
    G02860906Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    Fig 2: Resistance Reference Chart
    G02860905Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE PARK/NEUTRAL POSITION SWITCH ASSY (See  REPLACEMENT  ) 
    2. OK: GO TO NEXT STEP. 
  2. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM) 
    1. Connect the park/neutral position switch connector.
    2. Turn the ignition switch to the ON position, and measure the voltage according to the value (s) in the table below when the shift lever is moved to each position.
    Fig 3: Checking Harness And Connector (Park/Neutral Position Switch - ECM)
    G02860907Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    Fig 4: Terminal Condition Chart
    G02860908Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    *: The voltage will drop slightly due to lighting up of the back up light.

    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
    2. OK: REPLACE ECM (See  REPLACEMENT  )