Inspection Procedure

INSPECT ECM (+B VOLTAGE)
1. Turn the ignition switch to ON.
2. Measure the voltage between the specified terminals of the E6 and E8 ECM connectors.
  Standard:
  
  Fig 1: ECM Connector Terminals Specified Condition Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 2: Identifying ECM Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )

NG: GO TO NEXT STEP.
CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)
1. Disconnect the E8 ECM connector.
2. Check the resistance between the wire harness side connectors.
  Standard (Check for open):
  
  Fig 3: ECM And Body Ground Terminals Specified Condition Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reconnect the ECM connector.
  
  Fig 4: Disconnecting E8 ECM Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP.
INSPECT ECM (IGSW VOLTAGE)
1. Turn the ignition switch to ON.
2. Measure the voltage between the specified terminals of the E6 and E8 ECM connectors.
  Standard:
  
  Fig 5: ECM Connector Terminals Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 6: Identifying ECM Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK: Go to step 6

NG: GO TO NEXT STEP.
INSPECT FUSE (IGN FUSE)
1. Remove the IG2 fuse from the engine room J/B.
2. Check for continuity in the IG2 fuse. Standard: Continuity
3. Reinstall the IG2 fuse.
  
  Fig 7: Identifying IG2 Fuse
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED FUSE

OK: GO TO NEXT STEP.
INSPECT IGNITION OR STARTER SWITCH ASSY
1. Disconnect the 114 ignition switch connector.
2. Check for continuity between the connector terminals shown in the figure Fig 8 below.
  Standard:
  
  Fig 8: Starter Switch Connector Terminals Continuity Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 9: Identifying Starter Switch Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE IGNITION OR STARTER SWITCH ASSY

OK: CHECK AND REPAIR HARNESS AND CONNECTOR (BATTERY - IGNITION SWITCH, IGNITION SWITCH - ECM)
INSPECT ECM (MREL VOLTAGE)
1. Turn the ignition switch to ON.
2. Measure the voltage between the specified terminals of the E6 and E8 ECM connectors.
  Standard:
  
  Fig 10: ECM Connector Terminals Specified Condition Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 11: Identifying ECM Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE ECM (See ECM (3MZ-FE) )

OK: GO TO NEXT STEP.
INSPECT FUSE (EFI FUSE)
1. Remove the EFI fuse from the engine room J/B.
2. Measure the resistance in the EFI fuse.
  Standard: Below 1 Ω
3. Reinstall the EFI fuse.
  
  Fig 12: Identifying EFI Fuse
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED FUSE

OK: GO TO NEXT STEP.
INSPECT EFI RELAY
1. Remove the EFI relay from the engine room J/B.
2. Check for continuity in the EFI relay.
  Standard:
  
  Fig 13: EFI Relay Terminals Continuity Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reinstall the EFI relay.
  
  Fig 14: Checking Continuity Between EFI Relay Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE EFI RELAY

OK: GO TO NEXT STEP.
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 J/B.
  2. Disconnect the E6 ECM connector.
  3. Check the resistance between the wire harness side connectors.
    Standard (Check for open):
    
    Fig 15: EFI Relay And ECM Connector Terminals Specified Condition Chart (Check For Open)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Standard (Check for short):
    
    Fig 16: EFI Relay And ECM Connector Terminals Specified Condition Chart (Check For Short)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Reinstall the EFI relay.
  5. Reconnect the ECM connector.
    
    Fig 17: Identifying EFI Relay
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 18: Disconnecting E6 ECM Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the harness and the connector between the EFI relay and the body ground.
  1. Remove the EFI relay from the engine room J/B.
  2. Check the resistance between the wire harness side connector and the body ground.
    Standard (Check for open):
    
    Fig 19: EFI Relay And Body Ground Terminals Specified Condition Chart (Check For Open)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Reinstall the EFI relay.
OK: REPAIR OR REPLACE HARNESS OR CONNECTOR

NG: CHECK AND REPAIR HARNESS AND CONNECTOR (TERMINAL +B OF ECM - BATTERY POSITIVE TERMINAL)