TIRE PRESSURE WARNING SYSTEM TERMINALS OF ECU


  1. CHECK TIRE PRESSURE WARNING ECU AND RECEIVER


    1. Disconnect the F118 tire pressure warning ECU and receiver connector and measure the voltage and resistance on the wire harness side.

      A01NJLXE07
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Tire Pressure Warning ECU and Receiver)

      		 - -
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F118-1 (IG) - F118-4 (GND) V - W-B IG power source Power switch on (IG) 10 to 16 V
      F118-3 (CANP) - F118-6 (CANN) V - W CAN communication line Power switch off 54 to 69 Ω
      F118-4 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    2. Connect the F118 tire pressure warning ECU and receiver connector.

    3. Measure the voltage and resistance 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
      *a

      Component with harness connected

      (Tire Pressure Warning ECU and Receiver)

      		 - -
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F118-2 (CLSW) - F118-4 (GND) GR - W-B Tire pressure warning reset switch signal

      • Power switch on (IG)

      • Tire pressure warning reset switch on

      		 Below 2.4 V

      • Power switch on (IG)

      • Tire pressure warning reset switch off

      		 8 to 15 V