Inspection Procedure

HINT:

• Read freeze frame data using Techstream. The ECM (Included in HV control ECU) records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.

1. PERFORM SIMULATION TEST 
   1. Clear the DTC (s) (See DTC CHECK / CLEAR  ).
   2. Change the arrangement of the ignition coils (with igniters).
      NOTE: Do not change the location of the connectors.
   3. Perform a simulation test.

      Result 

      RESULT CHART
      
      

      Display (DTC Output)	Proceed to
      Same DTCs (that have been erased)	A
      Other DTCs	B

   B: REPLACE IGNITION COIL ASSEMBLY 

   A: Go to Next Step 

2. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE) 
   1. Disconnect the I2, I3, I4, I5, I6 or I7 ignition coil connector.
   2. Turn the ignition switch to the ON position.
   3. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

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

      Fig 1: Identifying Terminals Of I2, I3, I4, I5, I6 Or I7 Ignition Coil Connectors

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      I2-4 - Body ground	Below 1 Ω
      I3-4 - Body ground	Below 1 Ω
      I4-4 - Body ground	Below 1 Ω
      I5-4 - Body ground	Below 1 Ω
      I6-4 - Body ground	Below 1 Ω
      I7-4 - Body ground	Below 1 Ω

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

3. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - HV CONTROL ECU) 
   1. Disconnect the I2, I3, I4, I5, I6 or I7 ignition coil connector.
   2. Disconnect the HV control ECU H32 connectors.
   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
      IGT1 (I2-3) - IGT1 (H32-8)	Below 1 Ω
      IGT2 (I3-3) - IGT2 (H32-9)	Below 1 Ω
      IGT3 (I4-3) - IGT3 (H32-10)	Below 1 Ω
      IGT4 (I5-3) - IGT4 (H32-11)	Below 1 Ω
      IGT5 (I6-3) - IGT5 (H32-12)	Below 1 Ω
      IGT6 (I7-3) - IGT6 (H32-13)	Below 1 Ω

      Standard resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      IGT1 (I2-3) or IGT1 (H32-8) - Body ground	10 kΩ or higher
      IGT2 (I3-3) or IGT2 (H32-9) - Body ground	10 kΩ or higher
      IGT3 (I4-3) or IGT3 (H32-10) - Body ground	10 kΩ or higher
      IGT4 (I5-3) or IGT4 (H32-11) - Body ground	10 kΩ or higher
      IGT5 (I6-3) or IGT5 (H32-12) - Body ground	10 kΩ or higher
      IGT6 (I7-3) or IGT6 (H32-13) - Body ground	10 kΩ or higher

      Fig 2: Identifying Terminals Of H32 HV Control ECU H32 Connectors

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance (Check for open) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      IGF (I2-2) - IGF (H32-24)	Below 1 Ω
      IGF (I3-2) - IGF (H32-24)	Below 1 Ω
      IGF (I4-2) - IGF (H32-24)	Below 1 Ω
      IGF (I5-2) - IGF (H32-24)	Below 1 Ω
      IGF (I6-2) - IGF (H32-24)	Below 1 Ω
      IGF (I7-2) - IGF (H32-24)	Below 1 Ω

      Standard resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      IGF (I2-2) or IGF (H32-24) - Body ground	10 kΩ or higher
      IGF (I3-2) or IGF (H32-24) - Body ground	10 kΩ or higher
      IGF (I4-2) or IGF (H32-24) - Body ground	10 kΩ or higher
      IGF (15-2) or IGF (H32-24) - Body ground	10 kΩ or higher
      IGF (16-2) or IGF (H32-24) - Body ground	10 kΩ or higher
      IGF (17-2) or IGF (H32-24) - Body ground	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

4. CHECK HV CONTROL ECU (IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGF1 SIGNAL) 
   1. Inspect using an oscilloscope.
   2. Put the engine in inspection mode (See CHECK MODE PROCEDURE  ).
   3. Start the engine.
   4. Check the waveform of the HV control ECU connectors.

      Standard 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      IGF (H32-24) - E1 (H31-5)	Correct waveform is shown
      IGT1 (H32-8) - E1 (H31-5)
      IGT2 (H32-9) - E1 (H31-5)
      IGT3 (H32-10) - E1 (H31-5)
      IGT4 (H32-11) - E1 (H31-5)
      IGT5 (H32-12) - E1 (H31-5)
      IGT6 (H32-13) - E1 (H31-5)

   Fig 3: IGT And IGF Signal Waveform
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE HV CONTROL ECU 

   OK: Go to Next Step 

5. CHECK IF DTC OUTPUT RECURS 
   1. Clear the DTCs (See DTC CHECK / CLEAR  ).
   2. Connect Techstream to the DLC3.
   3. Turn the ignition switch to the ON position and turn Techstream ON.
   4. Enter the following menus: Powertrain / Engine and ECT / Trouble Code.
   5. Read the DTCs.

      Result 

      RESULT CHART
      
      

      Display (DTC Output)	Proceed to
      P0351, P0352, P0353, P0354, P0355 and/or P0356 are output	A
      No output	B

   B: SYSTEM OK 

   A: REPLACE HV CONTROL ECU