Inspection Procedure

HINT:

• Read freeze frame data using the intelligent tester. 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, and other data from the time the malfunction occurred.
• These DTCs indicate a malfunction related to a primary circuit.
• If DTC P0351 is displayed, check No. 1 ignition coil with igniter circuit.
• If DTC P0352 is displayed, check No. 2 ignition coil with igniter circuit.
• If DTC P0353 is displayed, check No. 3 ignition coil with igniter circuit.
• If DTC P0354 is displayed, check No. 4 ignition coil with igniter circuit.
• If DTC P0355 is displayed, check No. 5 ignition coil with igniter circuit.
• If DTC P0356 is displayed, check No. 6 ignition coil with igniter circuit.
• If DTC P0357 is displayed, check No. 7 ignition coil with igniter circuit.
• If DTC P0358 is displayed, check No. 8 ignition coil with igniter circuit.

1. INSPECT SPARK PLUG 
   1. Remove the engine cover.
   2. Remove the ignition coil and the spark plug of the misfiring cylinder.
   3. Check the electrode for carbon deposits.
   4. Measure the spark plug's electrode gap.
      Fig 1: Measuring Spark Plug Electrode Gap

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: 

      The electrode gap is 1.0 to 1.3 mm (0.039 to 0.051 in.). 

      Recommended spark plug 

      SPARK PLUG REFERENCE CHART
      
      

      Manufacturer	Spark Plug Type
      DENSO	SK20R11
      NGK	IFR6A11

      NOTE: If the electrode gap is larger than the standard, replace the spark plug. Do not adjust the electrode gap.

   NG: REPLACE SPARK PLUG 

   OK: Go to next step 

2. CHECK SPARK AND IGNITION 
   1. Disconnect the injector connectors to prevent the engine from starting.
   2. Install the spark plug to the ignition coil.
   3. Attach the spark plug to the cylinder head cover.
   4. Crank the engine within 2 seconds and check the spark.

      OK: 

      Spark occurs. 

   NG: Go to step  5

   Fig 2: Checking Spark And Ignition

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step 

3. CHECK WIRE HARNESS (IGNITION COIL - ECM) 
   1. Disconnect the I1, I2, I3, I4, I5, I6, I7 and I8 ignition coil connectors.
   2. Disconnect the E4 ECM connector.
      Fig 3: Disconnecting E4 ECM Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      I1-2 (IGF) - E4-7 (IGF1)	Below 1 Ω
      I2-2 (IGF) - E4-6 (IGF2)	Below 1 Ω
      I3-2 (IGF) - E4-6 (IGF2)	Below 1 Ω
      I4-2 (IGF) - E4-7 (IGF1)	Below 1 Ω
      I5-2 (IGF) - E4-6 (IGF2)	Below 1 Ω
      I6-2 (IGF) - E4-7 (IGF1)	Below 1 Ω
      I7-2 (IGF) - E4-7 (IGF1)	Below 1 Ω
      I8-2 (IGF) - E4-6 (IGF2)	Below 1 Ω
      I1-2 (IGF) or E4-7 (IGF1) - Body ground	10 kΩ or higher
      I2-2 (IGF) or E4-6 (IGF2) - Body ground	10 kΩ or higher
      I3-2 (IGF) or E4-6 (IGF2) - Body ground	10 kΩ or higher
      I4-2 (IGF) or E4-7 (IGF1) - Body ground	10 kΩ or higher
      I5-2 (IGF) or E4-6 (IGF2) - Body ground	10 kΩ or higher
      I6-2 (IGF) or E4-7 (IGF1) - Body ground	10 kΩ or higher
      I7-2 (IGF) or E4-7 (IGF1) - Body ground	10 kΩ or higher
      I8-2 (IGF) or E4-6 (IGF2) - Body ground	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

   OK: Go to next step 

4. CHECK ECM (IGF1, IGF2, VOLTAGE) 
   1. Disconnect the I1, I2, I3, I4, I5, I6, I7 and I8 ignition coil connectors.
   2. Turn the ignition switch ON.
   3. Measure the voltage of the ECM connectors.
      Fig 4: Identifying E3 And E4 ECM Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      E4-7 (IGF1) - E3-7 (E1)	4.5 to 5.5 V
      E4-6 (IGF2) - E3-7 (E1)	4.5 to 5.5 V

   NG: REPLACE ECM 

   OK: Go to next step 

5. CHECK WIRE HARNESS (IGNITION COIL - ECM) 
   1. Disconnect the I1, I2, I3, I4, I5, I6, I7 and I8 ignition coil connectors.
   2. Disconnect the E2 and E4 ECM connectors.
      Fig 5: Disconnecting E2 And E4 ECM Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      I1-3 (IGT1) - E2-17 (IGT1)	Below 1 Ω
      I2-3 (IGT2) - E4-13 (IGT2)	Below 1 Ω
      I3-3 (IGT3) - E2-16 (IGT3)	Below 1 Ω
      I4-3 (IGT4) - E4-12 (IGT4)	Below 1 Ω
      I5-3 (IGT5) - E2-27 (IGT5)	Below 1 Ω
      I6-3 (IGT6) - E4-11 (IGT6)	Below 1 Ω
      I7-3 (IGT7) - E2-26 (IGT7)	Below 1 Ω
      I8-3 (IGT8) - E4-10 (IGT8)	Below 1 Ω
      I1-3 (IGT1) or E2-17 (IGT1) - Body ground	10 kΩ or higher
      I2-3 (IGT2) or E4-13 (IGT2) - Body ground	10 kΩ or higher
      I3-3 (IGT3) or E2-16 (IGT3) - Body ground	10 kΩ or higher
      I4-3 (IGT4) or E4-12 (IGT4) - Body ground	10 kΩ or higher
      I5-3 (IGT5) or E2-27 (IGT5) - Body ground	10 kΩ or higher
      I6-3 (IGT6) or E4-11 (IGT6) - Body ground	10 kΩ or higher
      I7-3 (IGT7) or E2-26 (IGT7) - Body ground	10 kΩ or higher
      I8-3 (IGT8) or E4-10 (IGT8) - Body ground	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

   OK: Go to next step 

6. CHECK ECM (IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGT7, IGT8 VOLTAGE) 
   1. Measure the voltage of the ECM connectors when the engine is cranked.
      Fig 6: Identifying E2, E3 And E4 ECM Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      E2-17 (IGT1) - E3-7 (E1)	0.1 to 4.5 V
      E4-13 (IGT2) - E3-7 (E1)	0.1 to 4.5 V
      E2-16 (IGT3) - E3-7 (E1)	0.1 to 4.5 V
      E4-12 (IGT4) - E3-7 (E1)	0.1 to 4.5 V
      E2-27 (IGT5) - E3-7 (E1)	0.1 to 4.5 V
      E4-11 (IGT6) - E3-7 (E1)	0.1 to 4.5 V
      E2-26 (IGT7) - E3-7 (E1)	0.1 to 4.5 V
      E4-10 (IGT8) - E3-7 (E1)	0.1 to 4.5 V

   NG: REPLACE ECM 

   OK: Go to next step 

7. CHECK IGNITION COIL (POWER SOURCE) 
   1. Disconnect the I1, I2, I3, I4, I5, I6, I7 and I8 ignition coil connectors.
      Fig 7: Identifying I1, I2, I3, I4, I5, I6, I7 And I8 Ignition Coil Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Turn the ignition switch from ON to start.
   3. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

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

   OK: REPLACE IGNITION COIL 

   NG: Go to next step 

8. CHECK WIRE HARNESS (IGNITION COIL - IG2 RELAY (Marking: IG2)) 
   1. Inspect the INJ fuse.
      1. Remove the INJ fuse from the engine room No. 2 relay block.
      2. Measure the resistance of the INJ fuse.

         Standard resistance: 

         Below 1 Ω 

      3. Install the INJ fuse to the engine room No. 2 relay block.
         Fig 8: Inspecting INJ Fuse

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Disconnect the I1, I2, I3, I4, I5, I6, I7 and I8 ignition coil connectors.
   3. Remove the IG2 relay from the engine room No. 1 relay block.
   4. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      Fig 9: Identifying I1, I2, I3, I4, I5, I6, I7 And I8 Ignition Coil Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      I1-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
      I2-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
      I3-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
      I4-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
      I5-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
      I6-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
      I7-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
      I8-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
      I1-1 (+B) or relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
      I2-1 (+B) or relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
      I3-1 (+B) or relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
      I4-1 (+B) or relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
      I5-1 (+B) or relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
      I6-1 (+B) or relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
      I7-1 (+B) or relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
      I8-1 (+B) or relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

   OK: REPLACE IGNITION COIL