TIRE PRESSURE WARNING SYSTEM TERMINALS OF ECU


  1. CHECK TIRE PRESSURE WARNING ECU AND RECEIVER


    1. Disconnect the tire pressure warning ECU and receiver L63 connector and measure the voltage and resistance on the wire harness side.

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      Text in Illustration
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      Front view of wire harness connector

      (to Tire Pressure Warning ECU and Receiver)

      		 - -
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L63-1 (IG1) - L63-4 (GN1) B - G IG power source Engine switch on (IG) 10 to 16 V
      L63-4 (GN1) - Body ground G - Body ground Ground Always Below 1 Ω

    2. Connect the tire pressure warning ECU and receiver L63 connector.

    3. Measure the voltage according to the value(s) in the table below. If the result is not as specified, the ECU may have a malfunction.

      Tech Tips

      Inspect the connectors from the back side while the connectors are connected.

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      Text in Illustration
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      Component with harness connected

      (Tire Pressure Warning ECU and Receiver)

      		 - -
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L63-2 (CS1) - L63-4 (GN1) R - G Tire pressure warning reset switch

      • Engine switch on (IG)

      • Tire pressure warning reset switch ON

      		 Below 2.4 V

      • Engine switch on (IG)

      • Tire pressure warning reset switch OFF

      		 8 to 15 V