Inspection Procedure

INSPECT ECM (+B VOLTAGE)
1. Turn the ignition switch ON.
2. Measure the voltage between terminals of the E3 and E6 ECM connectors.
  Standard:
  
  Fig 1: Specific Condition Charts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 2: Identifying ECM Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
2. NG: Go to next step.
CHECK WIRE HARNESS (ECM - BODY GROUND)
1. Disconnect the E3 ECM connector.
2. Measure the resistance between the wire harness side connectors.
  Standard:
  
  Fig 3: Specific Condition Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 4: Identifying ECM Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
2. OK: GO TO NEXT STEP.
INSPECT ECM (IGSW VOLTAGE)
1. Turn the ignition switch ON.
2. Measure the voltage between terminals of the E6 and E3 ECM connectors.
  Standard:
  
  Fig 5: Specific Condition Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 6: Identifying ECM (IGSW Voltage)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: Go to step 6
2. NG: Go to next step.
INSPECT FUSE (IGN)
1. Remove the IGN fuse from the engine room No.2 relay block (R/B).
2. Measure the resistance.
  Standard: Below 1 Ω
  
  Fig 7: Identifying IGN Fuse
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED FUSE
2. OK: GO TO NEXT STEP.
INSPECT IGNITION OR STARTER SWITCH ASSY
1. Measure the resistance between the connector terminals shown in the chart below.
  Standard:
  
  Fig 8: Specific Condition Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 9: Identifying Ignition Switch
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE IGNITION OR STARTER SWITCH ASSY
2. OK: Go to next step.
CHECK AND REPAIR HARNESS AND CONNECTOR (BATTERY - IGNITION SWITCH, IGNITION SWITCH - ECM)
INSPECT ECM (MREL VOLTAGE)
1. Turn the ignition switch ON.
2. Measure the voltage between the specified terminals of the E3 and E6 ECM connectors.
  Standard:
  
  Fig 10: Specific Condition Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 11: Checking Harness And Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE ECM (See REPLACEMENT )
2. OK: GO TO NEXT STEP.
CHECK FUSE (EFI)
1. Remove the EFI fuse from the engine room No. 1 R/B.
2. Measure the resistance.
  Standard: Below 1 Ω
  
  Fig 12: Checking EFI Fuse
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE FUSE (EFI)
2. OK: GO TO NEXT STEP.
INSPECT RELAY (EFI)
1. Remove the EFI relay from the engine room No. 2 R/B.
2. Measure the resistance.
  Standard:
  
  Fig 13: Specific Condition Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 14: Checking EFI Relay
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE RELAY (EFI)
2. OK: GO TO NEXT STEP.
CHECK WIRE HARNESS (EFI RELAY - ECM, RELAY - BODY GROUND)
1. Check the wire harness between the EFI relay and PCM connector.
  1. Remove the EFI relay from the engine room No.2 R/B.
  2. Disconnect the E6 ECM connector.
  3. Measure the resistance of the wire harness side connectors.
    Standard:
    
    Fig 15: Specific Condition Chart
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 16: Identifying EFI Relay
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the wire harness between the EFI relay and the body ground.
  1. Remove the EFI relay from the engine room No.2 R/B.
  2. Measure the resistance between the wire harness side connector and the body ground.
    Standard:
    
    Fig 17: Specific Condition Chart
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 18: Identifying ECM Connector Terminal
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: CHECK AND REPAIR HARNESS AND CONNECTOR (TERMINAL +B OF ECM - BATTERY POSITIVE TERMINAL)
2. OK: Go to next step.
REPAIR OR REPLACE HARNESS AND CONNECTOR