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 I8 ignition coil will igniter connector.
Disconnect the E5 ECM connector.

CHECK:

Check the resistance between the wire harness side connectors.

OK:

TESTER CONNECTION AND SPECIFIED CONDITION

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 Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Disconnecting E5 ECM 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 AND SPECIFIED CONDITION

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 E5 & E7 ECM Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Replace ECM (See ENGINE CONTROL MODULE (ECM) ).
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 AND SPECIFIED CONDITION

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 Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 5: Identifying E5 ECM 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: Terminal Identification & Specified Condition Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 7: Identifying IGT1 - IGT8 & E1 Of ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Replace ECM (See ENGINE CONTROL MODULE (ECM) ).
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: Terminal Identification & Specified Condition Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 9: Identifying E5 & E7 ECM Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Replace ECM (See ENGINE CONTROL MODULE (ECM) ).
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: Terminal Identification & Specified Condition Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 11: Identifying Ignition Coil With Igniter Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Repair ignition coil with igniter.
2. OK: 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, I2, I3, I4, I5, I6, I7 or I8 ignition coil with igniter connector.
Disconnect the 118 ignition switch connector.

CHECK:

Measure the resistance between the wire harness side connectors.

OK:

TESTER CONNECTION AND SPECIFIED CONDITION

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 118 Ignition Switch Connector

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