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Home >> Toyota >> 2005 >> Avalon Touring >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Theft Deterrent System >> Ignition Switch Circuit >> Inspection Procedure

Inspection Procedure

  1. READ DATA LIST BY HAND-HELD TESTER 
    1. Connect the hand-held tester (with CAN VIM) to the DLC3.
    2. Turn the ignition switch on (IG) and press the hand-held tester main switch on.
    3. Select the item below in the DATA LIST and then check that the indicator operates.

      BODY (Multiplex network body ECU): 

      BODY (MULTIPLEX NETWORK BODY ECU) SPECIFICATION

      Item Test Details Diagnostic Note
      IG SW Ignition switch signal ON/OFF -

      OK: When turning the ignition switch on and off, the hand-held tester display changes between "ON" and "OFF". 

    1. NG: Go to step 2 
    2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE  PROBLEM SYMPTOMS TABLE  ) 
  2. INSPECT APPARATUS 
    1. Choose the apparatus to be inspected.
      APPARATUS SPECIFICATION

      Apparatus Go to step
      w/o smart key system A
      w/smart key system B
    1. B : Go to step   9 
    2. A : Go to next step. 
  3. INSPECT FUSE (ECU-IG, AM1) 
    1. Remove the ECU-IG and AM1 fuses from the instrument panel J/B.
    2. Check the resistance.

      Standard: Below 1 Ω 

    1. NG: CHECK FOR SHORT IN ALL HARNESS AND COMPONENTS CONNECTED TO FAILURE FUSE 
    2. OK: Go to next step. 
  4. INSPECT RELAY (IG1) 
    1. Remove the IG1 relay from the instrument panel J/B.
    2. Check the resistance of the IG1 relay.

      Standard: 

      TESTER - CONNECTORS SPECIFICATION

      Tester Connection Specified Condition
      3 - 5 10 kΩ or higher
      3 - 5 Below 1 Ω (When battery voltage is applied to terminals 1 and 2)
      Fig 1: Checking Resistance Of IG1 Relay
      G02977384Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE RELAY 
    2. OK: Go to next step. 
  5. CHECK WIRE HARNESS (POWER SOURCE) 
    1. Disconnect the IA J/B connector.
    2. Check the voltage between the wire harness side connector and the body ground.

      Standard: 

      TESTER - CONNECTORS SPECIFICATION

      Tester Connection Condition Specified Condition
      IA-1 - Body ground Always 10 to 14 V
      Fig 2: Disconnecting IA J/B Connector
      G02977385Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE) 
    2. OK: Go to next step. 
  6. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B ASSY (MULTIPLEX NETWORK BODY ECU) - BODY GROUND) 
    1. Disconnect the IF J/B connector.
    2. Check the resistance between the wire harness side connector and the body ground.
      TESTER - CONNECTORS SPECIFICATION

      Tester Connection Specified Condition
      IF-10 - Body ground Below 1 Ω
      Fig 3: Disconnecting IF J/B Connector
      G02977386Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: Go to next step. 
  7. INSPECT IGNITION OR STARTER SWITCH ASSY 
    1. Disconnect the connector from the ignition or starter switch.
    2. Check the switch resistance.

      Standard: 

      TESTER - CONNECTORS SPECIFICATION

      Tester Connection Switch Position Specified Condition
      2 - 4 ON Below 1 Ω
      Fig 4: Inspecting Ignition Or Starter Switch Assy
      G02977387Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE IGNITION OR STARTER SWITCH ASSY 
    2. OK: Go to next step. 
  8. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B ASSY - IGNITION OR STARTER SWITCH ASSY) 
    1. Disconnect the II J/B connector.
    2. Disconnect the D30 switch connector.
    3. Check the resistance between the wire harness side connectors.

      Standard: 

      SYMBOL - CONNECTORS SPECIFICATION

      Symbol (Tester Connection) Specified Condition
      II-9 - D30-4 Below 1 Ω
      II-9 - Body ground 10 kΩ or higher
      Fig 5: Disconnecting II J/B Connector
      G02977388Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY 
  9. INSPECT FUSE (ECU-IG) 
    1. Remove the ECU-IG fuse from the instrument panel J/B.
    2. Check the resistance.

      Standard: Below 1 Ω 

    1. NG: CHECK FOR SHORT IN ALL HARNESS AND COMPONENTS CONNECTED TO FAILURE FUSE 
    2. OK: Go to next step. 
  10. INSPECT RELAY (IG1) 
    1. Remove the IG1 relay from the instrument panel J/B.
    2. Check the resistance of the IG1 relay.

      Standard: 

      TESTER - CONNECTORS SPECIFICATION

      Tester Connection Specified Condition
      3 - 5 10 kΩ or higher
      3 - 5 Below 1 Ω (When battery voltage is applied to terminals 1 and 2)
      Fig 6: Removing IG1 Relay From Instrument Panel J/B
      G02977389Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE RELAY 
    2. OK: Go to next step. 
  11. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSY ((MULTIPLEX NETWORK BODY ECU) - BODY GROUND) (POWER SOURCE) 
    1. Disconnect the IA J/B connector.
    2. Check the voltage between the wire harness side connector and the body ground.

      Standard: 

      TESTER - CONNECTORS SPECIFICATION

      Tester Connection Condition Specified Condition
      IA-1 - Body ground Always 10 to 14 V
      Fig 7: Disconnecting IA J/B Connector
      G02977390Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE) 
    2. OK: Go to next step. 
  12. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B ASSY (MULTIPLEX NETWORK BODY ECU) - BODY GROUND) 
    1. Disconnect the IF J/B connector.
    2. Check the resistance between the wire harness side connector and the body ground.

      Standard: 

      TESTER - CONNECTORS SPECIFICATION

      Tester Connection Specified Condition
      IF-10 - Body ground Below 1 Ω
      Fig 8: Disconnecting IF J/B Connector
      G02977391Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT) 
    2. OK: Go to next step. 
  13. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B ASSY - INSTRUMENT PANEL J/B ASSY) 
    1. Disconnect the II J/B connector.
    2. Check the resistance of the wire harness side connectors.

      Standard: 

      TESTER - CONNECTORS SPECIFICATION

      Tester Connection Switch Position Specified Condition
      II-4 - II-9 Ignition switch ON Below 1 Ω
      Fig 9: Disconnecting II J/B Connector
      G02977392Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step 14 
    2. OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY 
  14. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B ASSY - POWER SOURCE ECU) 
    1. Disconnect the II J/B connector.
    2. Disconnect the D44 ECU connector.
    3. Check the resistance between the wire harness side connectors.

      Standard: 

      SYMBOL - CONNECTORS SPECIFICATION

      Symbol (Tester Connection) Specified Condition
      (II-9) - IG1D (D44-34) Below 1 Ω
      (II-9) - Body ground 10 kΩ or higher
      Fig 10: Disconnecting D44 ECU Connector
      G02977393Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO SMART KEY SYSTEM 
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