Inspection Procedure

HINT:

Read freeze frame data using Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (See DTC CHECK/CLEAR ).

INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)

Disconnect the ignition coil connector.
Turn the ignition switch to ON.

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

Standard voltage

VOLTAGE SPECIFIED CONDITION

Tester Connection	Specified Condition
B36-1 - Body ground	9 to 14 V
B21-1 - Body ground	9 to 14 V
B35-1 - Body ground	9 to 14 V
B22-1 - Body ground	9 to 14 V
B34-1 - Body ground	9 to 14 V
B23-1 - Body ground	9 to 14 V

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

Fig 1: Identifying Ignition Coil Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Specified Condition
B36-4 - Body ground	Below 1 Ω
B21-4 - Body ground	Below 1 Ω
B35-4 - Body ground	Below 1 Ω
B22-4 - Body ground	Below 1 Ω
B34-4 - Body ground	Below 1 Ω
B23-4 - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM (IGT SIGNAL TERMINAL))

Disconnect the ignition coil connector.
Disconnect the ECM connector.

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

Standard resistance (Check for open)

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Specified Condition
IGT1 (B36-3) - IGT1 (B50-40)	Below 1 Ω
IGT2 (B21-3) - IGT2 (B50-39)	Below 1 Ω
IGT3 (B35-3) - IGT3 (B50-38)	Below 1 Ω
IGT4 (B22-3) - IGT4 (B50-37)	Below 1 Ω
IGT5 (B34-3) - IGT5 (B50-36)	Below 1 Ω
IGT6 (B23-3) - IGT6 (B50-35)	Below 1 Ω

Standard resistance (Check for short)

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Specified Condition
IGT1 (B36-3) or IGT1 (B50-40) - Body ground	10 kΩ or higher
IGT2 (B21-3) or IGT2 (B50-39) - Body ground	10 kΩ or higher
IGT3 (B35-3) or IGT3 (B50-38) - Body ground	10 kΩ or higher
IGT4 (B22-3) or IGT4 (B50-37) - Body ground	10 kΩ or higher
IGT5 (B34-3) or IGT5 (B50-36) - Body ground	10 kΩ or higher
IGT6 (B23-3) or IGT6 (B50-35) - Body ground	10 kΩ or higher

Fig 2: Identifying Ignition Coil And ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance (Check for open)

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Specified Condition
IGF (B36-2) - IGF1 (B50-106)	Below 1 Ω
IGF (B21-2) - IGF1 (B50-106)	Below 1 Ω
IGF (B35-2) - IGF1 (B50-106)	Below 1 Ω
IGF (B22-2) - IGF1 (B50-106)	Below 1 Ω
IGF (B34-2) - IGF1 (B50-106)	Below 1 Ω
IGF (B23-2) - IGF1 (B50-106)	Below 1 Ω

Standard resistance (Check for short)

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Specified Condition
IGF (B36-2) or IGF1 (B50-106) - Body ground	10 kΩ or higher
IGF (B21-2) or IGF1 (B50-106) - Body ground	10 kΩ or higher
IGF (B35-2) or IGF1 (B50-106) - Body ground	10 kΩ or higher
IGF (B22-2) or IGF1 (B50-106) - Body ground	10 kΩ or higher
IGF (B34-2) or IGF1 (B50-106) - Body ground	10 kΩ or higher
IGF (B23-2) or IGF1 (B50-106) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

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

DTC OUTPUT RESULT

Display (DTC Output)	Proceed to
Same DTCs (that have been erased)	A
Other DTCs	B

B: REPLACE IGNITION COIL ASSEMBLY

A: REPLACE ECM (See REMOVAL )