Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester. 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.

Standard:

Electrode gap: 1.0 to 1.3 mm (0.039 to 0.051 in.)

Recommended spark plug

RECOMMENDED SPARK PLUG

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.

Fig 1: Identifying Spark Plug Electrode Gap

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

NG: Go to step 5

OK: Go to next step

CHECK WIRE HARNESS (IGNITION COIL - ECM)

Disconnect the E11, E14, E17, E20, E28, E30, E35 and E37 ignition coil connectors.
Disconnect the E6 ECM connector.

Measure the resistance of the wire harness side connectors.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E11-2 (IGF1) - E6-7 (IGF1)	Below 1 Ω
E37-2 (IGF2) - E6-6 (IGF2)	Below 1 Ω
E14-2 (IGF2) - E6-6 (IGF2)	Below 1 Ω
E35-2 (IGF1) - E6-7 (IGF1)	Below 1 Ω
E17-2 (IGF2) - E6-6 (IGF2)	Below 1 Ω
E30-2 (IGF1) - E6-7 (IGF1)	Below 1 Ω
E20-2 (IGF1) - E6-7 (IGF1)	Below 1 Ω
E28-2 (IGF2) - E6-6 (IGF2)	Below 1 Ω
E11-2 (IGF1) or E6-7 (IGF1) - Body ground	10 kΩ or higher
E37-2 (IGF2) or E6-6 (IGF2) - Body ground	10 kΩ or higher
E14-2 (IGF2) or E6-6 (IGF2) - Body ground	10 kΩ or higher
E35-2 (IGF1) or E6-7 (IGF1) - Body ground	10 kΩ or higher
E17-2 (IGF2) or E6-6 (IGF2) - Body ground	10 kΩ or higher
E30-2 (IGF1) or E6-7 (IGF1) - Body ground	10 kΩ or higher
E20-2 (IGF1) or E6-7 (IGF1) - Body ground	10 kΩ or higher
E28-2 (IGF2) or E6-6 (IGF2) - Body ground	10 kΩ or higher

Fig 3: Disconnecting E6 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go to next step

CHECK ECM (IGF1, IGF2, VOLTAGE)

Disconnect the E11, E14, E17, E20, E28, E30, E35 and E37 ignition coil connectors.
Turn the engine switch on (IG).

Measure the voltage of the ECM connector.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E6-7 (IGF1) - E7-7 (E1)	4.5 to 5.5 V
E6-6 (IGF2) - E7-7 (E1)	4.5 to 5.5 V

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE ECM

OK: Go to next step

CHECK WIRE HARNESS (IGNITION COIL - ECM)

Disconnect the E11, E14, E17, E20, E28, E30, E35 and E37 ignition coil connectors.
Disconnect the E6 and E8 ECM connectors.

Measure the resistance of the wire harness side connectors.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E11-3 (IGT1) - E8-17 (IGT1)	Below 1 Ω
E37-3 (IGT2) - E6-13 (IGT2)	Below 1 Ω
E14-3 (IGT3) - E8-16 (IGT3)	Below 1 Ω
E35-3 (IGT4) - E6-12 (IGT4)	Below 1 Ω
E17-3 (IGT5) - E8-27 (IGT5)	Below 1 Ω
E30-3 (IGT6) - E6-11 (IGT6)	Below 1 Ω
E20-3 (IGT7) - E8-26 (IGT7)	Below 1 Ω
E28-3 (IGT8) - E6-10 (IGT8)	Below 1 Ω
E11-3 (IGT1) or E8-17 (IGT1) - Body ground	10 kΩ or higher
E37-3 (IGT2) or E6-13 (IGT2) - Body ground	10 kΩ or higher
E14-3 (IGT3) or E8-16 (IGT3) - Body ground	10 kΩ or higher
E35-3 (IGT4) or E6-12 (IGT4) - Body ground	10 kΩ or higher
E17-3 (IGT5) or E8-27 (IGT5) - Body ground	10 kΩ or higher
E30-3 (IGT6) or E6-11 (IGT6) - Body ground	10 kΩ or higher
E20-3 (IGT7) or E8-26 (IGT7) - Body ground	10 kΩ or higher
E28-3 (IGT8) or E6-10 (IGT8) - Body ground	10 kΩ or higher

Fig 5: Disconnecting E6 And E8 ECM Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Tester Connection	Specified Condition
E8-17 (IGT1) - E7-7 (E1)	0.1 to 4.5 V
E6-13 (IGT2) - E7-7 (E1)	0.1 to 4.5 V
E8-16 (IGT3) - E7-7 (E1)	0.1 to 4.5 V
E6-12 (IGT4) - E7-7 (E1)	0.1 to 4.5 V
E8-27 (IGT5) - E7-7 (E1)	0.1 to 4.5 V
E6-11 (IGT6) - E7-7 (E1)	0.1 to 4.5 V
E8-26 (IGT7) - E7-7 (E1)	0.1 to 4.5 V
E6-10 (IGT8) - E7-7 (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 E11, E14, E17, E20, E28, E30, E35 and E37 ignition coil connectors.
Turn the engine switch from on (IG) to start.

Measure the voltage of the wire harness side connector.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E11-1 (+B) - Body ground	9 to 14 V
E37-1 (+B) - Body ground	9 to 14 V
E14-1 (+B) - Body ground	9 to 14 V
E35-1 (+B) - Body ground	9 to 14 V
E17-1 (+B) - Body ground	9 to 14 V
E30-1 (+B) - Body ground	9 to 14 V
E20-1 (+B) - Body ground	9 to 14 V
E28-1 (+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)

Inspect the IG2 fuse.
1. Remove the IG2 fuse from the engine room No. 2 relay block.
2. Measure the resistance of the IG2 fuse.
  Standard resistance:
  
  Below 1 Ω
Disconnect the E11, E14, E17, E20, E28, E30, E35 and E37 ignition coil connectors.
Remove the IG2 relay from the engine room No. 2 relay block.

Measure the resistance of the wire harness side connectors.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E11-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
E37-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
E14-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
E35-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
E17-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
E30-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
E20-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
E28-1 (+B) - Relay block IG2 relay terminal 3	Below 1 Ω
E11-1 (+B) or Relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
E37-1 (+B) or Relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
E14-1 (+B) or Relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
E35-1 (+B) or Relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
E17-1 (+B) or Relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
E30-1 (+B) or Relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
E20-1 (+B) or Relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher
E28-1 (+B) or Relay block IG2 relay terminal 3 - Body ground	10 kΩ or higher

Fig 8: Identifying IG2 Relay And IG2 Fuse

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE IGNITION COIL