Inspection Procedure

1. Remove the P/I fuse, AM2 fuse, IG2 fuse and EFI MAIN fuse from the engine room No. 1 relay block.
   Fig 1: Identifying P/I Fuse, AM2 Fuse, IG2 Fuse And EFI MAIN Fuse

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the IGN fuse from the instrument panel junction block.
Fig 2: Identifying IGN Fuse
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3. Measure the resistance of the fuses.

   Standard resistance: 

   Below 1Ω 

4. Reinstall the fuses.

NG: CHECK FOR SHORT IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE 

OK: Go to next step 

1. Remove the integration relay and IG2 relay from the engine room No. 1 relay block.
Fig 3: Identifying IG2 Relay Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance between the terminal of the integration relay.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connections	Specified Conditions
   1C-1 - 1A-4	10 kΩ or higher
   	Below 1 Ω (When battery voltage is applied to terminals 1A-2 and 1A-3)

3. Measure the resistance between the terminal of the IG2 relay.
   Fig 4: Identifying IG2 Relay Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connections	Specified Conditions
   3 - 5	10 kΩ or higher
   	Below 1 Ω (When battery voltage is applied to terminals 1 and 2)

4. Reinstall the relay.

NG: REPLACE RELAY 

OK: Go to next step 

1. Disconnect the B30 ECM connector.
Fig 5: Identifying B30 ECM Connector Terminal
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2. Measure the resistance.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   B30-104 (E1) - Body ground	Below 1 Ω

3. Reconnect the ECM connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the B30 and A9 ECM connectors.
   Fig 6: Identifying B30 And A9 ECM Connectors Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch ON.
3. Measure the voltage between the terminals of the B30 and A9 ECM connectors.

   Standard voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connections	Specified Conditions
   A9-28 (IGSW) - B30-104 (E1)	9 to 14 V

4. Reconnect the ECM connector.

OK: REPLACE ECM 

NG: Go to next step 

1. Disconnect the A9 ECM connector.
   Fig 7: Identifying A9 ECM Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the E3 ignition switch connector.
Fig 8: Identifying E3 Ignition Switch Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Disconnect the battery positive terminal.
4. Remove the AM2 fuse and IG2 relay.
Fig 9: Identifying AM2 Fuse And IG2 Relay Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Measure the resistance between the terminals.

   Standard resistance (Check for open) 

   RESISTANCE SPECIFICATION
   
   

   Tester Connections	Specified Conditions
   A9-28 (IGSW) - Engine room No. 1 relay block IG2 relay terminal 5	Below 1 Ω
   Engine room No. 1 relay block IG2 relay terminal 2 - Body ground	Below 1 Ω
   Positive (+) battery cable - Engine room relay block No. 1 AM2 fuse terminal 1	Below 1 Ω
   Positive (+) battery cable - Engine room relay block No. 1 IG2 relay terminal 3	Below 1 Ω
   E3-7 (AM2) - Engine room No. 1 relay block AM2 fuse terminal 2	Below 1 Ω
   E3-6 (IG2) - Engine room No. 1 relay block IG2 relay terminal 1	Below 1 Ω

   Standard resistance (Check for short) 

   RESISTANCE SPECIFICATION
   
   

   Tester Connections	Specified Conditions
   A9-28 (IGSW) or Engine room No. 1 relay block IG2 relay terminal 5 - Body ground	10 kΩ or higher
   Positive (+) battery cable or Engine room No. 1 relay block AM2 fuse terminal 1 - Body ground	10 kΩ or higher
   Positive (+) battery cable or Engine room No. 1 relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
   E3-7 (AM2) or Engine room No. 1 relay block AM2 fuse terminal 2 - Body ground	10 kΩ or higher
   E3-6 (1G2) or Engine room No. 1 relay block IG2 relay terminal 1 - Body ground	10 kΩ or higher

6. Reinstall the relay and fuse.
7. Reconnect the connectors.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

NG: REPLACE IGNITION SWITCH 

OK: Go to next step 

1. Disconnect the A9 ECM connector.
   Fig 10: Identifying A9 ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the integration relay from the engine room No. 1 relay block.
3. Disconnect the integration relay connector.
Fig 11: Identifying Integration Relay Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Remove the P/I fuse from the engine room No. 1 relay block.
5. Check the resistance between the terminals.

   Standard resistance (Check for open) 

   RESISTANCE SPECIFICATION
   
   

   Tester Connections	Specified Conditions
   A9-2 (+B) - 1A-4	Below 1 Ω
   A9-1 (+B2) - 1A-4	Below 1 Ω
   A9-44 (MREL) - 1A-2	Below 1 Ω
   Engine room relay block No. 1 P/I fuse terminal 2 - 1C-1	Below 1 Ω
   1A-3 - Body ground	Below 1 Ω

   Standard resistance (Check for short) 

   RESISTANCE SPECIFICATION
   
   

   Tester Connections	Specified Conditions
   A9-2 (+B) or 1A-4 - Body ground	10 kΩ or higher
   A9-1 (+B2) or 1A-4 - Body ground	10 kΩ or higher
   A9-44 (MREL) or 1A-2 - Body ground	10 kΩ or higher
   Engine room No. 1 relay block P/I fuse terminal 2 or 1C-1 - Body ground	10 kΩ or higher

6. Reconnect the connectors.
7. Reinstall the integration relay and P/I fuse.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPAIR OR REPLACE ENGINE ROOM NO. 1 RELAY BLOCK