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Home >> Toyota >> 2009 >> Highlander Limited, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Warning Systems >> Tire & Wheel (Except Hybrid) >> Tire Pressure Warning System >> DTC C2173/73 Vehicle Speed or Engine Speed Signal Malfunction >> Inspection Procedure

Inspection Procedure

NOTE:
  • When replacing the tire pressure warning ECU, read the transmitter IDs stored in the old ECU using Techstream and write them down before removal.
  • It is necessary to perform initialization (See INITIALIZATION ) after registration (See REGISTRATION ) of the transmitter IDs into the tire pressure warning ECU if the ECU has been replaced.
  1. PERFORM SIGNAL CHECK (VEHICLE SPEED SIGNAL AND ENGINE SPEED SIGNAL) 
    1. Enter the signal check mode in TEST MODE PROCEDURE (See TEST MODE PROCEDURE ).
    2. Drive the vehicle at 20 km/h (12 mph) or more for 3 seconds or more to erase DTC C2191/91.
    3. Start the engine and allow it to run at 1000 rpm for 3 seconds or more to erase DTC C2194/94.
    4. Check for test mode DTCs.

    Result 

    RESULT REFERENCE

    Result Proceed to
    DTCs C2191/91 and C2194/94 are erased A
    DTC C2191/91 is output B
    DTC C2194/94 is output C

    HINT:

    DTCs C2181/81 to C2185/85 (Transmitter ID not Received) are output at this time, but they are not related to this check.

    B: GO TO DTC C2191/91  (See DTC C2191/91 VEHICLE SPEED SIGNAL ERROR (TEST MODE DTC) )

    C: GO TO DTC C2194/94  (See DTC C2194/94 ENGINE SPEED SIGNAL ERROR (TEST MODE DTC) )

    A: USE SIMULATION METHOD TO CHECK  (See HOW TO PROCEED WITH TROUBLESHOOTING )

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