Inspection Procedure

HINT:

Read freeze frame data using 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 (See WIRING DIAGRAM ).

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. Reform a simulation test.

   Result 

   RESULT REFERENCE 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 E22, E32, E23, E33, E24 or E35 ignition coil connector.
   2. Turn the engine switch on (IG).
   3. Measure the voltage according to the value(s) in the table below.
      Fig 1: Identifying Terminals Of E22, E32, E23, E33, E24 Or E35 Ignition Coil Connectors

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      E22-1 - Body ground	9 to 14 V
      E32-1 - Body ground	9 to 14 V
      E23-1 - Body ground	9 to 14 V
      E33-1 - Body ground	9 to 14 V
      E24-1 - Body ground	9 to 14 V
      E35-1 - Body ground	9 to 14 V

   4. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   E22-4 - Body ground	Below 1 Ω
   E32-4 - Body ground	Below 1 Ω
   E23-4 - Body ground	Below 1 Ω
   E33-4 - Body ground	Below 1 Ω
   E24-4 - Body ground	Below 1 Ω
   E35-4 - 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 - ECM (IGT SIGNAL TERMINAL)) 
   1. Disconnect the E22, E32, E23, E33, E24 or E35 ignition coil connector.
   2. Disconnect the ECM E5 and E6 connectors.
   3. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying Terminals Of E22, E32, E23, E33, E24 Or E35 Ignition Coil Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance (Check for open) 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   IGT1 (E22-3) - IGT1 (E5-13)	Below 1 Ω
   IGT2 (E32-3) - IGT2 (E6-14)	Below 1 Ω
   IGT3 (E23-3) - IGT3 (E5-10)	Below 1 Ω
   IGT4 (E33-3) - IGT4 (E5-12)	Below 1 Ω
   IGT5 (E24-3) - IGT5 (E6-13)	Below 1 Ω
   IGT6 (E35-3) - IGT6 (E6-12)	Below 1 Ω

   Standard resistance (Check for short) 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   IGT1 (E22-3) or IGT1 (E5-13) - Body ground	10 kΩ or higher
   IGT2 (E32-3) or IGT2 (E6-14) - Body ground	10 kΩ or higher
   IGT3 (E23-3) or IGT3 (E5-10) - Body ground	10 kΩ or higher
   IGT4 (E33-3) or IGT4 (E5-12) - Body ground	10 kΩ or higher
   IGT5 (E24-3) or IGT5 (E6-13) - Body ground	10 kΩ or higher
   IGT6 (E35-3) or IGT6 (E6-12) - Body ground	10 kΩ or higher

   Standard resistance (Check for open) 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   IGF1 (E22-2) - IGF1 (E5-7)	Below 1 Ω
   IGF2 (E32-2) - IGF2 (E5-6)	Below 1 Ω
   IGF1 (E23-2) - IGF1 (E5-7)	Below 1 Ω
   IGF2 (E33-2) - IGF2 (E5-6)	Below 1 Ω
   IGF1 (E24-2) - IGF1 (E5-7)	Below 1 Ω
   IGF2 (E35-2) - IGF2 (E5-6)	Below 1 Ω

   Standard resistance (Check for short) 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   IGF1 (E22-2) or IGF1 (E5-7) - Body ground	10 kΩ or higher
   IGF2 (E32-2) or IGF2 (E5-6) - Body ground	10 kΩ or higher
   IGF1 (E23-2) or IGF1 (E5-7) - Body ground	10 kΩ or higher
   IGF2 (E33-2) or IGF2 (E5-6) - Body ground	10 kΩ or higher
   IGF1 (E24-2) or IGF1 (E5-7) - Body ground	10 kΩ or higher
   IGF2 (E35-2) or IGF2 (E5-6) - Body ground	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

4. CHECK ECM (IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGF1, IGF2 SIGNAL) 
   1. Inspect using an oscilloscope.
   2. While cranking or idling, check the waveform of the ECM connectors.

   Standard 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   IGF1 (E5-7) - E1 (E4-7) IGF2 (E5-6) - E1 (E4-7) IGT1 (E5-13) - E1 (E4-7) IGT2 (E6-14) - E1 (E4-7) IGT3 (E5-10) - E1 (E4-7) IGT4 (E5-12) - E1 (E4-7) IGT5 (E6-13) - E1 (E4-7) IGT6 (E6-12) - E1 (E4-7)	Correct waveform is as shown

   Fig 3: IGT And IGF Signal Waveform

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE ECM 

   OK: Go to next step 

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

   Result 

   RESULT REFERENCE
   
   

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

   B: SYSTEM IS OK 

   A: REPLACE ECM