Inspection Procedure

INSPECT ECM (+B VOLTAGE)
1. Turn the ignition switch ON.
2. Measure the voltage between the specified terminals of the E5 and E7 ECM connectors.
  
  Fig 1: Identifying Specified Terminals Of E5 And E7 ECM Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 2: Specified Conditions
  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 HARNESS AND CONNECTOR (ECM - BODY GROUND)
1. Disconnect the E7 ECM connector.
2. Check the resistance between the wire harness side connectors.
  
  Fig 3: Identifying ECM E7 Connector Terminal
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard (Check for open):
  
  Fig 4: Specified Conditions
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reconnect the ECM connector.
1. OK: GO TO NEXT STEP.
2. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
INSPECT ECM (IGSW VOLTAGE)
1. Turn the ignition switch ON.
2. Measure the voltage between the specified terminals of the E5 and E7 ECM connectors.
  
  Fig 5: Identifying Specified Terminals Of E5 and E7 ECM Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 6: Specified Conditions
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: Go to step 6
2. NG: GO TO NEXT STEP.
CHECK FUSE (IGN FUSE)
1. Remove the IGN fuse from the instrument panel J/B.
  
  Fig 7: Removing IGN Fuse From Instrument Panel J/B
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check for continuity in the IGN fuse.
  1. Standard: Continuity
3. Reinstall the IGN fuse.
1. OK: GO TO NEXT STEP.
2. NG: CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED FUSE
INSPECT IGNITION OR STARTER SWITCH ASSY
1. Check for continuity between the connector terminals shown in Fig 9.
  
  Fig 8: Identifying Ignition Or Starter Switch Assy Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 9: Specified Conditions
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: GO TO NEXT STEP.
2. NG: REPLACE IGNITION OR STARTER SWITCH ASSY
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 E5 and E7 ECM connectors.
  
  Fig 10: Identifying Specified Terminals Of E5 And E7 ECM Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 11: Specified Conditions
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: GO TO NEXT STEP.
2. NG: REPLACE ECM (See REPLACEMENT in ENGINE CONTROL SYSTEM )
CHECK FUSE (EFI NO. 1 FUSE)
1. Remove the EFI No. 1 fuse from the fusible link block.
  
  Fig 12: Locating EFI No. 1 Fuse
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the resistance in the EFI No. 1 fuse.
  1. Standard: Below 1 Ω
3. Reinstall the EFI No. 1 fuse.
1. OK: GO TO NEXT STEP.
2. NG: CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED FUSE
INSPECT EFI RELAY
1. Remove the EFI relay from the engine room R/B.
2. Inspect the EFI relay.
  
  Fig 13: Identifying EFI Relay Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 14: Specified Conditions
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reinstall the EFI relay.
1. OK: GO TO NEXT STEP.
2. NG: REPLACE EFI RELAY
CHECK HARNESS AND CONNECTOR (EFI RELAY - ECM, EFI RELAY - BODY GROUND)
1. Check the harness and connector between the EFI relay and ECM connector.
  1. Remove the EFI relay from the engine room R/B.
    
    Fig 15: Identifying EFI Relay Location & Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Disconnect the E5 ECM connector.
  3. Check the resistance between the wire harness side connectors.
    
    Fig 16: Identifying ECM E5 Connector Terminal
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Standard (Check for open):
    
    Fig 17: Specified Conditions
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Standard (Check for short):
    
    Fig 18: Specified Conditions
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Reinstall the EFI relay.
  5. Reconnect the ECM connector.
2. Check the harness and the connector between the EFI relay and the body ground.
  1. Remove the EFI relay from the engine room R/B.
  2. Check the resistance between the wire harness side connector and the body ground.
    Standard (Check for open):
    
    Fig 19: Specified Conditions
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Reinstall the EFI relay.
1. OK: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. NG: CHECK AND REPAIR HARNESS AND CONNECTOR (TERMINAL +B OF ECM - BATTERY POSITIVE TERMINAL)