Inspection Procedure

1. Turn the engine switch on (IG).
2. Measure the voltage according to the value(s) in the table below.

Standard voltage 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE 

NG: Go to next step. 

1. Disconnect the E4 ECM connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open) 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   E1 (E4-7) - Body ground	Below 1 Ω

3. Reconnect the ECM connector.
Fig 1: Identifying Terminals Of ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step. 

1. Turn the engine switch on (IG).
2. Measure the voltage according to the value(s) in the table below.

Standard voltage 

Fig 2: Identifying Terminals Of E4 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to step   6 

NG: Go to next step. 

1. Remove the IGN fuse from the cowl side junction block RH.
2. Measure the resistance of the IGN fuse.

   Standard resistance: 

   Below 1 Ω 

3. Reinstall the IGN fuse.
Fig 3: Identifying Terminals Of ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE IGN FUSE 

OK: Go to next step. 

1. Remove the IG2 relay from the engine room R/B No. 2.
2. Measure the resistance according to the value(s) in the table below.

Standard resistance 

Fig 4: Identifying Terminals Of A/F Relay

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NG: REPLACE IGNITION RELAY NO. 2 

OK:  GO TO

1. Turn the engine switch on (IG).
2. Measure the voltage according to the value(s) in the table below.

Standard voltage 

Fig 5: Identifying Terminals Of ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE ECM 

1. Remove the EFI fuse from the engine room R/B No.2.
2. Measure the resistance of the EFI fuse.

   Standard resistance: 

   Below 1 Ω 

3. Reinstall the EFI fuse.
   Fig 6: Identifying EFI Fuse

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE EFI FUSE 

   OK: Go to next step. 

1. Remove the integration relay from the engine room J/B No. 2.
2. Measure the resistance according to the value(s) in the table below.

Standard resistance 

Fig 7: Identifying Integration Relay

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NG: REPLACE INTEGRATION RELAY 

OK: Go to next step. 

1. Check the harness and the connectors between the integration relay and the ECM.
   1. Remove the integration relay from the engine room J/B and R/B No. 2.
   2. Disconnect the A5 ECM connector.
   3. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open) 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   2A-6-MREL (A5-13)	Below 1 Ω

   Standard resistance (Check for short) 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   2A-6 or MREL (A5-13) - Body ground	10 kΩ or higher

2. Check the harness and the connectors between the integration relay and body ground.
   1. Remove the integration relay from the engine room J/B and R/B No. 2.
   2. Measure the resistance according to the value(s) in the table below.

Standard resistance (Check for open) 

Fig 8: Identifying Terminals Of ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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