Inspection Procedure

HINT:

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.
Read freeze frame data using the hand-held tester or the OBD II scan tool. 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, as well as other data from the time when a malfunction occurred.

Check spark plug and spark (See ON-VEHICLE INSPECTION ).
1. NG: Go to step 4 .
2. OK: Go to Next Step

Check for open and short in harness and connector in IGF signal circuits between ECM and ignition coil with igniter.

PREPARATION:

Disconnect the I1, I2, I3, I4, I5, I6, I7 or 18 ignition coil will igniter connector.
Disconnect the E5 ECM connector.

CHECK:

Check the resistance between the wire harness side connectors.

OK:

Tester Connection Specified Condition Table

Tester Connection	Specified Condition
Ignition coil (I1-2) - IGF1 (E5-24)	Below 1 Ω
Ignition coil (I2-2) - IGF2 (E5-23)	Below 1 Ω
Ignition coil (I3-2) - IGF1 (E5-24)	Below 1 Ω
Ignition coil (I4-2) - IGF2 (E5-23)	Below 1 Ω
Ignition coil (I5-2) - IGF1 (E5-24)	Below 1 Ω
Ignition coil (I6-2) - IGF2 (E5-23)	Below 1 Ω
Ignition coil (I7-2) - IGF1 (E5-24)	Below 1 Ω
Ignition coil (I8-2) - IGF2 (E5-23)	Below 1 Ω
Ignition coil (I1-2) or IGF1 (E5-24) - Body ground	10 kΩ or higher
Ignition coil (I2-2) or IGF2 (E5-23) - Body ground	10 kΩ or higher
Ignition coil (I3-2) or IGF1 (E5-24) - Body ground	10 kΩ or higher
Ignition coil (I4-2) or IGF2 (E5-23) - Body ground	10 kΩ or higher
Ignition coil (I5-2) or IGF1 (E5-24) - Body ground	10 kΩ or higher
Ignition coil (I6-2) or IGF2 (E5-23) - Body ground	10 kΩ or higher
Ignition coil (I7-2) or IGF1 (E5-24) - Body ground	10 kΩ or higher
Ignition coil (I8-2) or IGF2 (E5-23) - Body ground	10 kΩ or higher

Fig 1: Identifying Ignition Coil With Igniter

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Identifying IGF2 And IGF1 Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Repair or replace harness or connector.
OK: Go to Next Step

Disconnect ignition coil with igniter connector, and check voltage between terminals IGF1, IGF2 and E1 of ECM connector.

PREPARATION:

Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil with igniter connector.
Turn the ignition switch ON.

CHECK:

Measure the voltage between the E5 and E7 ECM connectors.

OK:

Tester Connection Specified Condition Table

Tester Connection	Specified Condition
IGF1 (E5-24) - E1 (E7-1)	4.5 to 5.5 V
IGF2 (E5-23) - E1 (E7-1)	4.5 to 5.5 V

Fig 3: Identifying IGF1(+) And IGF2(+) E1 (-) Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Replace ECM (See INSPECTION ).
OK: Replace ignition coil with igniter.

Check for open and short in harness and connector in IGT signal circuit between ECM and ignition coil with igniter.

PREPARATION:

Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil connector.
Disconnect the E5 ECM connector.

CHECK:

Check the resistance between the wire harness side connectors.

OK:

Tester Connection Specified Condition Table

Tester Connection	Specified Condition
Ignition coil (I1-2) - IGT1 (E5-9)	Below 1 Ω
Ignition coil (I2-2) - IGT2 (E5-8)	Below 1 Ω
Ignition coil (I3-2) - IGT3 (E5-25)	Below 1 Ω
Ignition coil (I4-2) - IGT4 (E5-11)	Below 1 Ω
Ignition coil (I5-2) - IGT5 (E5-12)	Below 1 Ω
Ignition coil (I6-2) - IGT6 (E5-26)	Below 1 Ω
Ignition coil (I7-2) - IGT7 (E5-13)	Below 1 Ω
Ignition coil (I8-2) - IGT8 (E5-10)	Below 1 Ω
Ignition coil (I1-2) or IGT1 (E5-9) - Body ground	10 kΩ or higher
Ignition coil (I2-2) or IGT2 (E5-8) - Body ground	10 kΩ or higher
Ignition coil (I3-2) or IGT3 (E5-25) - Body ground	10 kΩ or higher
Ignition coil (I4-2) or IGT4 (E5-11) - Body ground	10 kΩ or higher
Ignition coil (I5-2) or IGT5 (E5-12) - Body ground	10 kΩ or higher
Ignition coil (I6-2) or IGT6 (E5-26) - Body ground	10 kΩ or higher
Ignition coil (I7-2) or IGT7 (E5-13) - Body ground	10 kΩ or higher
Ignition coil (I8-2) or IGT8 (E5-10) - Body ground	10 kΩ or higher

Fig 4: Identifying Ignition Coil With Igniter Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 5: Identifying IGT7, IGT6, IGT3, IGT2, IGT1, IGT8, IGT4 and IGT5 Connector

NG: Repair or replace harness or connector.
OK: Go to Next Step

Check voltage between terminals IGT1 - IGT8 and E1 of ECM connector and body ground.
CHECK:

Measure the voltage between terminals the E5 and E7 ECM connectors when the engine is cranked.

OK:

Fig 6: Tester Connection Specified Condition
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 7: Measuring Voltage Between Terminal E5 and E7 ECM Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Replace ECM (See INSPECTION ).
2. OK: Go to Next Step
Disconnect ignition coil with igniter connector, and check voltage between terminals IGT1 - IGT8 of ECM connector and body ground.
PREPARATION:

Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil with igniter connector.

CHECK:

Measure the voltage between terminals the E5 and E7 ECM connectors when the engine is cranked.

OK:

Fig 8: Tester Connection Specified Condition Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 9: Measuring Voltage Between Terminal E5 and E7 ECM Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Replace ECM (See INSPECTION ).
2. OK: Go to Next Step
Check ignition coil with igniter power source circuit.
PREPARATION:

Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil with igniter connector.

CHECK:

Measure the voltage between the terminal of the wire harness side connector and body ground.

OK:

Fig 10: Tester Connection & Specified Condition Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 11: Identifying Ignition Coil With Igniter Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: Repair ignition coil with igniter.
2. NG: Go to Next Step

Check for open and short in harness and connector between ignition switch and ignition coil with igniter.

PREPARATION:

Disconnect the I1, 2, I3, I4, I5, I6, I7 or I8 ignition coil with igniter connector.
Disconnect the I18 ignition switch connector.

CHECK:

Measure the resistance between the wire harness side connectors.

OK:

Tester Connection & Specified Condition Table

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

Fig 12: Identifying Ignition Coil With Igniter Connector

Fig 13: Identifying Ignition Switch I18

NG: Repair or replace harness or connector.
OK: Replace ignition coil with igniter.