Inspection Procedure

HINT:

Read freeze frame data using Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, 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. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE) 
   1. Disconnect the ignition coil with igniter connector.
   Fig 1: Identifying Ignition Coil With Igniter Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Measure the resistance.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFICATION
      
      

      Tester Connections	Specified Conditions
      B9-4 (GND) - Body ground	Below 1 Ω
      B10-4 (GND) - Body ground	Below 1 Ω
      B11-4 (GND) - Body ground	Below 1 Ω
      B12-4 (GND) - Body ground	Below 1 Ω

   3. Turn the ignition switch ON.
   4. Measure the voltage between the terminals of the wire harness side connector.

      Standard voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester Connections	Specified Conditions
      B9-1 (+B) - B9-4 (GND)	9 to 14 V
      B10-1 (+B) - B10-4 (GND)	9 to 14 V
      B11-1 (+B) - B11-4 (GND)	9 to 14 V
      B12-1 (+B) - B12-4 (GND)	9 to 14 V

   5. Reconnect the ignition coil with igniter connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

2. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM) 
   1. Disconnect the ignition coil with connector.
   Fig 2: Identifying Ignition Coil And ECM Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Disconnect the B30 ECM connector.
   3. Measure the resistance.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFICATION
      
      

      Tester Connections	Specified Conditions
      B9-2 (IGF) - B30-81 (IGF1)	Below 1 Ω
      B10-2 (IGF) - B30-81 (IGF1)	Below 1 Ω
      B11-2 (IGF) - B30-81 (IGF1)	Below 1 Ω
      B12-2 (IGF) - B30-81 (IGF1)	Below 1 Ω

      Standard resistance (Check for open) 

      RESISTANCE SPECIFICATION
      
      

      Tester Connections	Specified Conditions
      B12-3 (IGT1) - B30-85 (IGT1)	Below 1 Ω
      B11-3 (IGT2) - B30-84 (IGT2)	Below 1 Ω
      B10-3 (IGT3) - B30-83 (IGT3)	Below 1 Ω
      B9-3 (IGT4) - B30-82 (IGT4)	Below 1 Ω

      Standard resistance (Check for short) 

      RESISTANCE SPECIFICATION
      
      

      Tester Connections	Specified Conditions
      B9-2 (IGF) or B30-81 (IGF1) - Body ground	10 kΩ or higher
      B10-2 (IGF) or B30-81 (IGF1) - Body ground	10 kΩ or higher
      B11-2 (IGF) or B30-81 (IGF1) - Body ground	10 kΩ or higher
      B12-2 (IGF) or B30-81 (IGF1) - Body ground	10 kΩ or higher

      Standard resistance (Check for short) 

      RESISTANCE SPECIFICATION
      
      

      Tester Connections	Specified Conditions
      B12-3 (IGT1) or B30-85 (IGT1) - Body ground	10 kΩ or higher
      B11-3 (IGT2) or B30-84 (IGT2) - Body ground	10 kΩ or higher
      B10-3 (IGT3) or B30-83 (IGT3) - Body ground	10 kΩ or higher
      B9-3 (IGT4) or B30-82 (IGT4) - Body ground	10 kΩ or higher

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

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353 OR P0354) 
   1. Connect Techstream to the DLC3.
   2. Turn the ignition switch ON and turn the tester ON.
   3. Clear DTCs (see DTC CHECK / CLEAR  ).
   4. Shuffle arrangement of the ignition coils with igniters (among No. 1 to No. 4 cylinders).
      NOTE: Do not shuffle the connectors.
   5. Perform a simulation test.
   6. Check DTCs displayed on the tester.

      Result 

      RESULT REFERENCE
      
      

      Display (DTC Output)	Proceed To
      Same DTC output	A
      Different ignition coil DTC output	B

   B: REPLACE IGNITION COIL ASSEMBLY 

   A: REPLACE ECM