Inspection Procedure

HINT:

• If DTCs P0351, P0354, P0356 and P0357 are output simultaneously, IGF1 circuit may be open or short.
• If DTCs P0352, P0353, P0355 and P0358 are output simultaneously, IGF2 circuit may be open or short.
• Read freeze frame data using the hand-held tester or the OBDII scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, as well as other data from the time when a malfunction occurred.

1. Check spark plug and spark (See  IGNITION SYSTEM  ). 
   1. NG : Go to step   5 . 
   2. OK : Go to Next Step. 
2. Check for open and short in harness and connector in IGF signal circuits between ECM and ignition coil with igniter. 

   PREPARATION: 

   1. Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil will igniter connector.
   2. Disconnect the E8 ECM connector.

   CHECK: 

   Check the resistance between the wire harness side connectors.

   OK: 

   RESISTANCE CHECK SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   Ignition coil (I1-2) - IGF1 (E8-24)	Below 1 Ω
   Ignition coil (I2-2) - IGF2 (E8-23)	Below 1 Ω
   Ignition coil (I3-2) - IGF1 (E8-24)	Below 1 Ω
   Ignition coil (I4-2) - IGF2 (E8-23)	Below 1 Ω
   Ignition coil (I5-2) - IGF1 (E8-24)	Below 1 Ω
   Ignition coil (I6-2) - IGF2 (E8-23)	Below 1 Ω
   Ignition coil (I7-2) - IGF1 (E8-24)	Below 1 Ω
   Ignition coil (I8-2) - IGF2 (E8-23)	Below 1 Ω
   Ignition coil (I1-2) or IGF1 (E8-24) - Body ground	10 kΩ or higher
   Ignition coil (I2-2) or IGF2 (E8-23) - Body ground	10 kΩ or higher
   Ignition coil (I3-2) or IGF1 (E8-24) - Body ground	10 kΩ or higher
   Ignition coil (I4-2) or IGF2 (E8-23) - Body ground	10kΩ or higher
   Ignition coil (I5-2) or IGF1 (E8-24) - Body ground	10 kΩ or higher
   Ignition coil (I6-2) or IGF2 (E8-23) - Body ground	10kΩ or higher
   Ignition coil (I7-2) or IGF1 (E8-24) - Body ground	10 kΩ or higher
   Ignition coil (I8-2) or IGF2 (E8-23) - Body ground	10 kΩ or higher

   Fig 1: Identifying Ignition Coil And Igniter Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 2: Disconnecting E8 ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG : Repair or replace harness or connector. 
   2. OK : Go to Next Step. 
3. Disconnect ignition coil with igniter connector, and check voltage between terminals IGF1, IGF2 and E1 of ECM connector. 

   PREPARATION: 

   1. Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil with igniter connector.
   2. Turn the ignition switch ON.

   CHECK: 

   Measure the voltage between the E6 and E8 ECM connectors.

   OK: 

   VOLTAGE CHECK SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   IGF1 (E8-24) - E1 (E6-1)	4.5 to 5.5 V
   IGF2 (E8-23) - E1 (E6-1)	4.5 to 5.5 V

   Fig 3: Checking Voltage Between Terminals IGF1, IGF2 And E1 Of ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG : Replace ECM (See  ENGINE CONTROL MODULE (ECM)  ). 
   2. OK : Replace ignition coil with igniter. 
4. Check for open and short in harness and connector in IGT signal circuit between ECM and ignition coil with igniter. 

   PREPARATION: 

   1. Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil connector.
   2. Disconnect the E8 ECM connector.

   CHECK: 

   Check the resistance between the wire harness side connectors.

   OK: 

   RESISTANCE CHECK SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   Ignition coil (I1-2) - IGT1 (E8-9)	Below 1 Ω
   Ignition coil (I2-2) - IGT2 (E8-8)	Below 1 Ω
   Ignition coil (I3-2) - IGT3 (E8-25)	Below 1 Ω
   Ignition coil (I4-2) - IGT4 (E8-11)	Below 1 Ω
   Ignition coil (I5-2) - IGT5 (E8-12)	Below 1 Ω
   Ignition coil (I6-2) - IGT6 (E8-26)	Below 1 Ω
   Ignition coil (I7-2) - IGT7 (E8-13)	Below 1 Ω
   Ignition coil (I8-2) - IGT8 (E8-10)	Below 1 Ω
   Ignition coil (I1-2) or IGT1 (E8-9) - Body ground	10 kΩ or higher
   Ignition coil (I2-2) or IGT2 (E8-8) - Body ground	10 kΩ or higher
   Ignition coil (I3-2) or IGT3 (E8-25) - Body ground	10 kΩ or higher
   Ignition coil (I4-2) or IGT4 (E8-11) - Body ground	10 kΩ or higher
   Ignition coil (I5-2) or IGT5 (E8-12) - Body ground	10 kΩ or higher
   Ignition coil (I6-2) or IGT6 (E8-26) - Body ground	10 kΩ or higher
   Ignition coil (I7-2) or IGT7 (E8-13) - Body ground	10 kΩ or higher
   Ignition coil (I8-2) or IGT8 (E8-10) - Body ground	10 kΩ or higher

   Fig 4: Identifying Ignition Coil And Igniter Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 5: Disconnecting E8 ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG : Repair or replace harness or connector. 
   2. OK : Go to Next Step. 
5. Check voltage between terminals IGT1 - IGT8 and E1 of ECM connector. 

   CHECK: 

   Measure the voltage between terminals the E6 and E8 ECM connectors when the engine is cranked.

   OK: 

   Fig 6: Tester Connection Specified Condition Table

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 7: Identifying Terminals IGT1 - IGT8 And E1 Of ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG : Replace ECM (See  ENGINE CONTROL MODULE (ECM)  ). 
   2. OK : Go to Next Step. 
6. Disconnect ignition coil with igniter connector, and check voltage between terminals IGT1 - IGT8 of ECM connector. 

   PREPARATION: 

   Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil with igniter connector.

   CHECK: 

   Measure the voltage between terminals the E6 and E8 ECM connectors when the engine is cranked.

   OK: 

   Fig 8: Voltage Check Specified Condition Table

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 9: Identifying IGT1 - IGT8 Of ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG : Replace ECM (See  ENGINE CONTROL MODULE (ECM)  ). 
   2. OK : Go to Next Step. 
7. Check ignition coil with igniter power source circuit. 

   PREPARATION: 

   Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil with igniter connector.

   CHECK: 

   Measure the voltage between the terminal of the wire harness side connector and body ground.

   OK: 

   Fig 10: Identifying Ignition Coil And Igniter Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 11: Tester Connection Specified Condition Table

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK : Repair ignition coil with igniter. 
   2. NG : Go to Next Step. 
8. Check for open and short in harness and connector between ignition switch and ignition coil with igniter. 

   PREPARATION: 

   1. Disconnect the I1, 2, I3, I4, I5, I6, I7 or I8 ignition coil with igniter connector.
   2. Disconnect the I18 ignition switch connector.

   CHECK: 

   Measure the resistance between the wire harness side connectors.

   OK: 

   RESISTANCE CHECK SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   Ignition coil (I1-1) - IG2 (I18-6)	Below 1 Ω
   Ignition coil (I2-1) - IG2 (I18-6)	Below 1 Ω
   Ignition coil (I3-1) - IG2 (I18-6)	Below 1 Ω
   Ignition coil (I4-1) - IG2 (I18-6)	Below 1 Ω
   Ignition coil (I5-1) - IG2 (I18-6)	Below 1 Ω
   Ignition coil (I6-1) - IG2 (I18-6)	Below 1 Ω
   Ignition coil (I7-1) - IG2 (I18-6)	Below 1 Ω
   Ignition coil (I8-1) - IG2 (I18-6)	Below 1 Ω
   Ignition coil (I1-1) or IG2 (I18-6) - Body ground	10 kΩ or higher
   Ignition coil (I2-1) or IG2 (I18-6) - Body ground	10 kΩ or higher
   Ignition coil (I3-1) or IG2 (I18-6) - Body ground	10 kΩ or higher
   Ignition coil (I4-1) or IG2 (I18-6) - Body ground	10 kΩ or higher
   Ignition coil (I5-1) or IG2 (I18-6) - Body ground	10 kΩ or higher
   Ignition coil (I6-1) or IG2 (I18-6) - Body ground	10 kΩ or higher
   Ignition coil (I7-1) or IG2 (I18-6) - Body ground	10 kΩ or higher
   Ignition coil (I8-1) or IG2 (I18-6) - Body ground	10 kΩ or higher

   Fig 12: Identifying Ignition Coil Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 13: Identifying Ignition Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG : Repair or replace harness or connector. 
   2. OK : Replace ignition coil with igniter.