Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester. The ECM (Included in HV control ECU) 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.

Perform a simulation test.

Result

RESULT REFERENCE

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 to the ON position.

Measure the voltage according to the value(s) in the table below.

Standard voltage

TESTER CONNECTION AND SPECIFIED CONDITION

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 according to the value(s) in the table below.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

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 1: Identifying Ignition Coil Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR 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 according to the value(s) in the table below.
Standard resistance (Check for open)

TESTER CONNECTION AND SPECIFIED CONDITION

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 AND SPECIFIED CONDITION

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

Standard resistance (Check for open)

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
IGF (I2-2) - IGF (H32-24)	Below 1 Ω
IGF (I3-2) - IGF (H32-24)	Below 1 Ω
IGF (I4-2) - IGF (H32-24)	Below 1 Ω
IGF (I5-2) - IGF (H32-24)	Below 1 Ω
IGF (I6-2) - IGF (H32-24)	Below 1 Ω
IGF (I7-2) - IGF (H32-24)	Below 1 Ω

Fig 2: Identifying Ignition Coil Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance (Check for short)

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
IGF (I2-2) or IGF (H32-24) - Body ground	10 kΩ or higher
IGF (I3-2) or IGF (H32-24) - Body ground	10 kΩ or higher
IGF (I4-2) or IGF (H32-24) - Body ground	10 kΩ or higher
IGF (I5-2) or IGF (H32-24) - Body ground	10 kΩ or higher
IGF (I6-2) or IGF (H32-24) - Body ground	10 kΩ or higher
IGF (I7-2) or IGF (H32-24) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HV CONTROL ECU (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 AND SPECIFIED CONDITION

Tester Connection	Specified Condition
IGF (H32-24) - E1 (H31-5)	Correct waveform is shown
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)

NG: REPLACE HV CONTROL ECU

Fig 3: IGT And IGF Signal Waveform

OK: Go to next step

CHECK IF DTC OUTPUT RECURS

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

Result

RESULT REFERENCE

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

B: SYSTEM OK

A: REPLACE HV CONTROL ECU