Inspection Procedure

INSPECT ECM (+B VOLTAGE)
1. Turn the ignition switch to ON.
2. Measure the voltage between the terminals of the E7 and E9 ECM connectors.
Standard:

Fig 1: ECM Connector Terminals Specified Condition Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Identifying ECM Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE ( 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.
  Standard (Check for open):
  
  Fig 3: ECM Connector Terminals Specified Condition Table (Check For Open)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 4: Disconnecting E7 ECM Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reconnect the ECM connector.
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: GO TO NEXT STEP.
INSPECT ECM (IGSW VOLTAGE)
1. Turn the ignition switch to ON.
2. Measure the voltage between the terminals of the E7 and E9 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
1. OK: Go to step 6
2. OK: GO TO NEXT STEP.
CHECK FUSE (IGN FUSE)

Fig 7: Identifying IGN Fuse (Driver Side J/B)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Remove the IGN fuse from the driver side J/B.
2. Check for continuity in the IGN fuse.
  Standard: Continuity
3. Reinstall the IGN fuse.
1. NG: CHECK FOR SHORT IN ALL HARNESS AND COMPONENTS CONNECTED IGN FUSE
2. OK: GO TO NEXT STEP.
INSPECT IGNITION OR STARTER SWITCH ASSYM
1. Disconnect the I18 ignition switch connector.
2. Measure the resistance between the connector terminals shown in the chart below.
  Standard:
  
  Fig 8: Ignition Switch Connector Terminals Specified Condition Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 9: Identifying Ignition Switch Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reconnect the ignition switch connector.
1. NG: 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 to ON.
2. Measure the voltage between the terminals of the E7 and E9 ECM connectors.
Standard:

Fig 10: Ignition Switch Connector Terminals Specified Condition Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 11: Identifying ECM Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE ECM (See ECM (2UZ-FE) ) .
2. OK: GO TO NEXT STEP.
CHECK FUSE (EFI FUSE)

Fig 12: Identifying EFI Fuse (Engine Room R/B)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Remove the EFI fuse from the engine room R/B.
2. Check for continuity in the EFI fuse.
  Standard: Continuity
3. Reinstall the EFI fuse.
1. NG: CHECK FOR SHORT IN ALL HARNESS AND COMPONENTS CONNECTED EFI FUSE
2. OK: GO TO NEXT STEP.
INSPECT EFI RELAY
1. Remove the EFI relay from the engine room R/B.
2. Check for continuity in the EFI relay.
  Standard:
  
  Fig 13: EFI Relay Terminals Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 14: Checking Continuity Between EFI Relay Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reinstall the EFI relay.
1. NG: REPLACE EFI RELAY
2. 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.
  1. Remove the EFI relay from the engine room R/B.
  2. Disconnect the E9 ECM connector.
  3. Check the resistance between the wire harness side connectors.
    Standard (Check for open):
    
    Fig 15: EFI Relay Terminals Specified Condition Chart (Check For Open)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 16: Identifying EFI Relay (Engine Room R/B)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Standard (Check for short):
    
    Fig 17: EFI Relay Terminals Specified Condition Chart (Check For Short)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 18: Connecting E9 ECM Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Reinstall the EFI relay.
  5. Reconnect the ECM connector.
2. Check the harness and connector between the EFI relay and body ground.
  1. Remove the EFI relay from the engine room R/B.
  2. Check the resistance between the wire harness side connector and body ground.
    Standard (Check for open):
    
    Fig 19: EFI Relay Terminals Specified Condition Chart (Check For Open)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Reinstall the EFI relay.
1. OK: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. NG: GO TO NEXT STEP.
CHECK AND REPAIR HARNESS AND CONNECTOR (TERMINAL +B OF ECM - BATTERY POSITIVE TERMINAL)