Inspection Procedure

HINT:

• Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
• 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.

1. CHECK SPARK PLUG AND SPARK OF MISFIRING CYLINDER 
   1. Check the spark plug and spark of the misfiring cylinder (See INSPECTION PROCEDURE  ).

   NG: Go to step  4

   OK: Go to next step 

2. CHECK HARNESS AND CONNECTOR (IGNITION COIL - ECM [IGF SIGNAL TERMINAL]) 
   1. Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil with igniter connectors.
   2. Disconnect the E5 ECM connector.
   3. Measure the resistance between the wire harness side connectors.

      Standard resistance (Check for open) 

      STANDARD RESISTANCE
      
      

      Tester Connection	Specified Condition
      I1-2 - IGF1 (E5-24)	Below 1 Ω
      I2-2 - IGF2 (E5-25)
      I3-2 - IGF2 (E5-25)
      I4-2 - IGF1 (E5-24)
      I5-2 - IGF2 (E5-25)
      I6-2 - IGF1 (E5-24)
      I7-2 - IGF1 (E5-24)
      I8-2 - IGF2 (E5-25)

      Fig 1: Checking Harness And Connector (Ignition Coil - ECM [IGF Signal Terminal])

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance (Check for short) 

      STANDARD RESISTANCE
      
      

      Tester Connection	Specified Condition
      I1-2 or IGF1 (E5-24) - Body ground	10 kΩ or higher
      I2-2 or IGF2 (E5-25) - Body ground
      I3-2 or IGF2 (E5-25) - Body ground
      I4-2 or IGF1 (E5-24) - Body ground
      I5-2 or IGF2 (E5-25) - Body ground
      I6-2 or IGF1 (E5-24) - Body ground
      I7-2 or IGF1 (E5-24) - Body ground
      I8-2 or IGF2 (E5-25) - Body ground

   4. Reconnect the ignition coil with igniter connectors.
   5. Reconnect the ECM connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

3. INSPECT ECM (IGF1 AND IGF2 VOLTAGE) 
   1. Disconnect the ignition coil with igniter connectors.
   2. Turn the ignition switch ON.
   3. Measure the voltage of the E5 and E7 ECM connectors.

      Standard voltage 

      STANDARD VOLTAGE
      
      

      Tester Connection	Specified Condition
      IGF1 (E5-24) - E1 (E7-1)	4.5 to 5.5 V
      IGF2 (E5-25) - E1 (E7-1)

   4. Reconnect the ignition coil with igniter connectors.

   NG: REPLACE ECM 

   Fig 2: Inspecting ECM (IGF1 And IGF2 Voltage)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPLACE IGNITION COIL WITH IGNITER 

4. CHECK HARNESS AND CONNECTOR (IGNITION COIL - ECM [IGT SIGNAL TERMINAL]) 
   1. Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil with igniter connectors.
   2. Disconnect the E5 ECM connector.
   3. Measure the resistance between the wire harness side connectors.

      Standard resistance (Check for open) 

      STANDARD RESISTANCE
      
      

      Tester Connection	Specified Condition
      I1-3 - IGT1 (E5-8)	Below 1 Ω
      I2-3 - IGT2 (E5-15)
      I3-3 - IGT3 (E5-11)
      I4-3 - IGT4 (E5-10)
      I5-3 - IGT5 (E5-13)
      I6-3 - IGT6 (E5-12)
      I7-3 - IGT7 (E5-14)
      I8-3 - IGT8 (E5-9)

      Fig 3: Checking Harness And Connector (Ignition Coil - ECM [IGT Signal Terminal])

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance (Check for short) 

      STANDARD RESISTANCE
      
      

      Tester Connection	Specified Condition
      I1-3 or IGT1 (E5-8) - Body ground	10 kΩ or higher
      I2-3 or IGT2 (E5-15) - Body ground
      I3-3 or IGT3 (E5-11) - Body ground
      I4-3 or IGT4 (E5-10) - Body ground
      I5-3 or IGT5 (E5-13) - Body ground
      I6-3 or IGT6 (E5-12) - Body ground
      I7-3 or IGT7 (E5-14) - Body ground
      I8-3 or IGT8 (E5-9) - Body ground

   4. Reconnect the ignition coil with igniter connectors.
   5. Reconnect the ECM connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

5. INSPECT ECM (IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGT7 OR IGT8 VOLTAGE) 
   1. Measure the voltage of the E5 and E7 ECM connectors when the engine is cranked.

      Standard voltage 

      STANDARD VOLTAGE
      
      

      Tester Connection	Specified Condition
      IGT1 (E5-8) - E1 (E7-1)	0.1 to 4.5 V
      IGT2 (E5-15) - E1 (E7-1)
      IGT3 (E5-11) - E1 (E7-1)
      IGT4 (E5-10) - E1 (E7-1)
      IGT5 (E5-13) - E1 (E7-1)
      IGT6 (E5-12) - E1 (E7-1)
      IGT7 (E5-14) - E1 (E7-1)
      IGT8 (E5-9) - E1 (E7-1)

   NG: REPLACE ECM 

   Fig 4: Inspecting ECM (IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGT7 Or IGT8 Voltage)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step 

6. INSPECT ECM (IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGT7 OR IGT8 VOLTAGE) 
   1. Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil with igniter connectors.
   2. Measure the voltage of the E5 and E7 ECM connectors when the engine is cranked.

      Standard voltage 

      STANDARD VOLTAGE
      
      

      Tester Connection	Specified Condition
      IGT1 (E5-8) - E1 (E7-1)	4.5 V or more
      IGT2 (E5-15) - E1 (E7-1)
      IGT3 (E5-11) - E1 (E7-1)
      IGT4 (E5-10) - E1 (E7-1)
      IGT5 (E5-13) - E1 (E7-1)
      IGT6 (E5-12) - E1 (E7-1)
      IGT7 (E5-14) - E1 (E7-1)
      IGT8 (E5-9) - E1 (E7-1)

      Fig 5: Inspecting ECM (IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGT7 Or IGT8 Voltage)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Reconnect the ignition coil with igniter connectors.

   NG: REPLACE ECM 

   OK: Go to next step 

7. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE) 
   1. Disconnect the I1, I2, I3, I4, I5, I6, I7 and I8 ignition coil with igniter connectors.
   2. Turn the ignition switch ON or START.
   3. Measure the voltage of the wire harness side connector and body ground
      Fig 6: Inspecting Ignition Coil Assembly (Power Source)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      STANDARD VOLTAGE
      
      

      Tester Connection	Specified Condition
      I1-1 -Body ground	9 to 14 V
      I2-1 - Body ground
      I3-1 - Body ground
      I4-1 - Body ground
      I5-1 - Body ground
      I6-1 - Body ground
      I7-1 - Body ground
      I8-1 - Body ground

   4. Reconnect the ignition coil connectors.

   OK: REPLACE IGNITION COIL ASSEMBLY 

   NG: Go to next step 

8. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - IGNITION SWITCH) 
   1. Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil with igniter connectors.
   2. Disconnect the I18 ignition switch connector.
   3. Measure the resistance between the wire harness side connectors.

      Standard resistance (Check for open) 

      STANDARD RESISTANCE
      
      

      Tester Connection	Specified Condition
      Ignition coil (I1-1) - IG2 (I18-6)	Below 1 Ω.
      Ignition coil (I2-1) - IG2 (I18-6)
      Ignition coil (I3-1) - IG2 (I18-6)
      Ignition coil (I4-1) - IG2 (I18-6)
      Ignition coil (I5-1) - IG2 (I18-6)
      Ignition coil (I6-1) - IG2 (I18-6)
      Ignition coil (I7-1) - IG2 (I18-6)
      Ignition coil (I8-1) - IG2 (I18-6)

      Fig 7: Checking Harness And Connector (Ignition Coil Assembly - Ignition Switch)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance (Check for short) 

      STANDARD RESISTANCE
      
      

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

   4. Reconnect the ignition switch connector.
   5. Reconnect the ignition coil with igniter connectors.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE IGNITION COIL ASSEMBLY