Inspection Procedure

HINT:

Read freeze frame data using the Techstream. 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, and other data from the time the malfunction occurred.
These DTCs indicate a malfunction related to a primary circuit.
If DTC P0351 is displayed, check No. 1 ignition coil with igniter circuit.
If DTC P0352 is displayed, check No. 2 ignition coil with igniter circuit.
If DTC P0353 is displayed, check No. 3 ignition coil with igniter circuit.
If DTC P0354 is displayed, check No. 4 ignition coil with igniter circuit.
If DTC P0355 is displayed, check No. 5 ignition coil with igniter circuit.
If DTC P0356 is displayed, check No. 6 ignition coil with igniter circuit.
If DTC P0357 is displayed, check No. 7 ignition coil with igniter circuit.
If DTC P0358 is displayed, check No. 8 ignition coil with igniter circuit.

INSPECT SPARK PLUG

Remove the engine cover.
Remove the ignition coil and the spark plug of the misfiring cylinder.
Check the electrode for carbon deposits.
Measure the spark plug's electrode gap.

OK:

The electrode gap is 1.0 to 1.3 mm (0.039 to 0.051 in.).

Fig 1: Identifying Spark Plug Electrode Gap

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Recommended spark plug

RECOMMENDED SPARK PLUG MANUFACTURER CHART

Manufacturer	Spark Plug Type
DENSO	SK20R11
NGK	IFR6A11

NOTE: If the electrode gap is larger than the standard, replace the spark plug. Do not adjust the electrode gap.

NG: REPLACE SPARK PLUG

OK: Go to next step

CHECK SPARK AND IGNITION
1. Disconnect the injector connectors to prevent the engine from starting.
2. Install the spark plug to the ignition coil.
3. Attach the spark plug to the cylinder head cover.
4. Crank the engine within 2 seconds and check the spark.
OK:

Spark occurs.

NG: Go to step 5

Fig 2: Checking Spark And Ignition
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

CHECK WIRE HARNESS (IGNITION COIL-ECM)

Disconnect the I1, I2, I3, I4, I5, I6, I7 and I8 ignition coil connectors.
Disconnect the E4 ECM connector.
Measure the resistance of the wire harness side connectors.

Fig 3: Checking Wire Harness (Ignition Coil-ECM)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
I1-2 (IGF) - E4-7 (IGF1)	Below 1 Ω
I2-2 (IGF) - E4-6 (IGF2)	Below 1 Ω
I3-2 (IGF) - E4-6 (IGF2)	Below 1 Ω
I4-2 (IGF) - E4-7 (IGF1)	Below 1 Ω
I5-2 (IGF) - E4-6 (IGF2)	Below 1 Ω
I6-2 (IGF) - E4-7 (IGF1)	Below 1 Ω
I7-2 (IGF) - E4-7 (IGF1)	Below 1 Ω
I8-2 (IGF) - E4-6 (IGF2)	Below 1 Ω
I1-2 (IGF) or E4-7 (IGF1) - Body ground	10 kΩ or higher
I2-2 (IGF) or E4-6 (IGF2) - Body ground	10 kΩ or higher
I3-2 (IGF) or E4-6 (IGF2) - Body ground	10 kΩ or higher
I4-2 (IGF) or E4-7 (IGF1) - Body ground	10 kΩ or higher
I5-2 (IGF) or E4-6 (IGF2) - Body ground	10 kΩ or higher
I6-2 (IGF) or E4-7 (IGF1) - Body ground	10 kΩ or higher
I7-2 (IGF) or E4-7 (IGF1) - Body ground	10 kΩ or higher
I8-2 (IGF) or E4-6 (IGF2) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go to next step

CHECK ECM (IGF1, IGF2, VOLTAGE)

Disconnect the I1, I2, I3, I4, I5, I6, I7 and I8 ignition coil connectors.
Turn the ignition switch ON.
Measure the voltage of the ECM connectors.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
E4-7 (IGF1) - E3-7 (E1)	4.5 to 5.5 V
E4-6 (IGF2) - E3-7 (E1)	4.5 to 5.5 V

NG: REPLACE ECM

Fig 4: Checking ECM (IGF1, IGF2, Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

CHECK WIRE HARNESS (IGNITION COIL - ECM)

Disconnect the I1, I2, I3, I4, I5, I6, I7 and I8 ignition coil connectors.
Disconnect the E2 and E4 ECM connectors.
Measure the resistance of the wire harness side connectors.

Fig 5: Checking Wire Harness (Ignition Coil - ECM)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
I1-3 (IGT1) - E2-17 (IGT1)	Below 1 Ω
I2-3 (IGT2) - E4-13 (IGT2)	Below 1 Ω
I3-3 (IGT3) - E2-16 (IGT3)	Below 1 Ω
I4-3 (IGT4) - E4-12 (IGT4)	Below 1 Ω
I5-3 (IGT5) - E2-27 (IGT5)	Below 1 Ω
I6-3 (IGT6) - E4-11 (IGT6)	Below 1 Ω
I7-3 (IGT7) - E2-26 (IGT7)	Below 1 Ω
I8-3 (IGT8) - E4-10 (IGT8)	Below 1 Ω
I1-3 (IGT1) or E2-17 (IGT1) - Body ground	10 kΩ or higher
I2-3 (IGT2) or E4-13 (IGT2) - Body ground	10 kΩ or higher
I3-3 (IGT3) or E2-16 (IGT3) - Body ground	10 kΩ or higher
I4-3 (IGT4) or E4-12 (IGT4) - Body ground	10 kΩ or higher
I5-3 (IGT5) or E2-27 (IGT5) - Body ground	10 kΩ or higher
I6-3 (IGT6) or E4-11 (IGT6) - Body ground	10 kΩ or higher
I7-3 (IGT7) or E2-26 (IGT7) - Body ground	10 kΩ or higher
I8-3 (IGT8) or E4-10 (IGT8) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go to next step

CHECK ECM (IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGT7, IGT8 VOLTAGE)

Measure the voltage of the ECM connectors when the engine is cranked.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
E2-17 (IGT1) - E3-7 (E1)	0.1 to 4.5 V
E4-13 (IGT2) - E3-7 (E1)	0.1 to 4.5 V
E2-16 (IGT3) - E3-7 (E1)	0.1 to 4.5 V
E4-12 (IGT4) - E3-7 (E1)	0.1 to 4.5 V
E2-27 (IGT5) - E3-7 (E1)	0.1 to 4.5 V
E4-11 (IGT6) - E3-7 (E1)	0.1 to 4.5 V
E2-26 (IGT7) - E3-7 (E1)	0.1 to 4.5 V
E4-10 (IGT8) - E3-7 (E1)	0.1 to 4.5 V

Fig 6: Checking ECM (IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGT7, IGT8 Voltage)

NG: REPLACE ECM

OK: Go to next step

CHECK IGNITION COIL (POWER SOURCE)

Disconnect the 1I, I2, I3, I4, I5, I6, I7 and I8 ignition coil connectors.
Turn the ignition switch from ON to start.
Measure the voltage of the wire harness side connector.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
I1-1 (+B) - Body ground	9 to 14 V
I2-1 (+B) - Body ground	9 to 14 V
I3-1 (+B) - Body ground	9 to 14 V
I4-1 (+B) - Body ground	9 to 14 V
I5-1 (+B) - Body ground	9 to 14 V
I6-1 (+B) - Body ground	9 to 14 V
I7-1 (+B) - Body ground	9 to 14 V
I8-1 (+B) - Body ground	9 to 14 V

Fig 7: Checking Ignition Coil (Power Source)

OK: REPLACE IGNITION COIL

NG: Go to next step

CHECK WIRE HARNESS (IGNITION COIL - IG2 RELAY (Marking: IG2))

Inspect the INJ fuse.
1. Remove the INJ fuse from the engine room No. 2 relay block.
2. Measure the resistance of the INJ fuse.
  Standard resistance:
  
  Below 1 Ω
3. Install the INJ fuse to the engine room No. 2 relay block.
Fig 8: Identifying INJ Fuse
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the I1, I2, I3, I4, I5, I6, I7 and I8 ignition coil connectors.
Remove the IG2 relay from the engine room No. 1 relay block.
Measure the resistance of the wire harness side connectors.

Fig 9: Checking Wire Harness (Ignition Coil - IG2 Relay)

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
I1-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
I2-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
I3-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
I4-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
I5-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
I6-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
I7-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
I8-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
I1-1 (+B) or relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
I2-1 (+B) or relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
I3-1 (+B) or relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
I4-1 (+B) or relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
I5-1 (+B) or relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
I6-1 (+B) or relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
I7-1 (+B) or relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
I8-1 (+B) or relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE IGNITION COIL