DTC P0351 Ignition Coil "A" Primary / Secondary Circuit; DTC P0352 Ignition Coil "B" Primary / Secondary Circuit; DTC P0353 Ignition Coil "C" Primary / Secondary Circuit; DTC P0354 Ignition Coil "D" Primary / Secondary Circuit; DTC P0355 Ignition Coil "E" Primary / Secondary Circuit; DTC P0356 Ignition Coil "F" Primary / Secondary Circuit: Wiring Diagram

Fig 1: Wiring Diagram - Ignition Coil "A" Primary / Secondary Circuit

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.

PERFORM SIMULATION TEST

Clear the DTC(s) (See DTC CHECK / CLEAR ).
Change the arrangement of the ignition coils (with igniters).
NOTE: Do not change the location of the connectors.

Reform a simulation test.

Result

RESULT 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

INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)

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

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
I2-1 - Body ground	9 to 14 V
I3-1 - Body ground	9 to 14 V
I4-1 - Body ground	9 to 14 V
I5-1 - Body ground	9 to 14 V
I6-1 - Body ground	9 to 14 V
I7-1 - Body ground	9 to 14 V

Measure the resistance between the wire harness side connectors.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
I2-4 - Body ground	Below 1 Ω
I3-4 - Body ground	Below 1 Ω
I4-4 - Body ground	Below 1 Ω
I5-4 - Body ground	Below 1 Ω
I6-4 - Body ground	Below 1 Ω
I7-4 - Body ground	Below 1 Ω

Fig 2: Inspecting Ignition Coil Assembly (Power Source)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - HV CONTROL ECU)

Disconnect the I2, I3, I4, I5, I6 or I7 ignition coil connector.
Disconnect the HV Control ECU H32 connectors.

Measure the resistance between the wire harness side connectors.

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
IGT1 (I2-3) - IGT1 (H32-8)	Below 1 Ω
IGT2 (I3-3) - IGT2 (H32-9)	Below 1 Ω
IGT3 (I4-3) - IGT3 (H32-10)	Below 1 Ω
IGT4 (I5-3) - IGT4 (H32-11)	Below 1 Ω
IGT5 (I6-3) - IGT5 (H32-12)	Below 1 Ω
IGT6 (I7-3) - IGT6 (H32-13)	Below 1 Ω

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
IGT1 (I2-3) - IGT1 (H32-8) - Body ground	10 kΩ or higher
IGT2 (I3-3) - IGT2 (H32-9) - Body ground	10 kΩ or higher
IGT3 (I4-3) - IGT3 (H32-10) - Body ground	10 kΩ or higher
IGT4 (I5-3) - IGT4 (H32-11) - Body ground	10 kΩ or higher
IGT5 (I6-3) - IGT5 (H32-12) - Body ground	10 kΩ or higher
IGT6 (I7-3) - IGT6 (H32-13) - Body ground	10 kΩ or higher

Fig 3: Identifying HV Control ECU H32 Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
IGF1 (I2-2) - IGF1 (H32-24)	Below 1 Ω
IGF2 (I3-2) - IGF1 (H32-24)	Below 1 Ω
IGF3 (I4-2) - IGF1 (H32-24)	Below 1 Ω
IGF4 (I5-2) - IGF1 (H32-24)	Below 1 Ω
IGF5 (I6-2) - IGF1 (H32-24)	Below 1 Ω
IGF6 (I7-2) - IGF1 (H32-24)	Below 1 Ω

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
IGF1 (I2-2) or IGF1 (H32-24) - Body ground	10 kΩ or higher
IGF2 (I3-2) or IGF1 (H32-24) - Body ground	10 kΩ or higher
IGF3 (I4-2) or IGF1 (H32-24)- Body ground	10 kΩ or higher
IGF4 (I5-2) or IGF1 (H32-24) - Body ground	10 kΩ or higher
IGF5 (I6-2) or IGF1 (H32-24) - Body ground	10 kΩ or higher
IGF6 (I7-2) or IGF1 (H32-24)- 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, IGF1 SIGNAL)

Inspect using an oscilloscope.
Put the engine in inspection mode (See INSPECTION MODE PROCEDURE ).
Start the engine.

Check the waveform of the HV Control ECU connectors.

Standard

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
IGF1 (H32-24) - E1 (H31-5) IGT1 (H32-8) - E1 (H31-5) IGT2 (H32-9) - E1 (H31-5) IGT3 (H32-10) - E1 (H31-5) IGT4 (H32-11) - E1 (H31-5) IGT5 (H32-12) - E1 (H31-5) IGT6 (H32-13) - E1 (H31-5)	Correct waveform is shown

NG: REPLACE HV CONTROL ECU

Fig 4: Identifying ECM (IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGF1 Signal)

OK: GO TO NEXT STEP

CHECK IF DTC OUTPUT RECURS

Clear the DTC (See DTC CHECK / CLEAR ).
Connect the intelligent tester to the DLC3.
Turn the ignition switch ON and turn the intelligent tester ON.
Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.

Read DTC.

Result

RESULT CHART

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

B: REPAIR OR REPLACE SYSTEM OK

A: REPLACE HV CONTROL ECU