Toyota Tundra. Manual — part 1376

Fig. 137: Ignition Coil - Wiring Diagram (2 Of 2)

INSPECTION PROCEDURE

HINT:

Read freeze frame data using the Techstream. Freeze frame data records the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was
moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

from the time the malfunction occurred.

1. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)

a. Disconnect the D10, D12, D14, D16, D19, D21, D23 or D25 ignition coil with igniter connector.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

c. Turn the ignition switch to ON.

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

Fig. 138: Identifying Ignition Coil With Igniter Connector Terminal

Standard voltage

STANDARD VOLTAGE SPECIFICATION

Tester Connection

Condition Specified Condition

D10-4 (GND) - Body ground Always

Below 1 ohms

D25-4 (GND) - Body ground Always

Below 1 ohms

D12-4 (GND) - Body ground Always

Below 1 ohms

D23-4 (GND) - Body ground Always

Below 1 ohms

D14-4 (GND) - Body ground Always

Below 1 ohms

D21-4 (GND) - Body ground Always

Below 1 ohms

D16-4 (GND) - Body ground Always

Below 1 ohms

D19-4 (GND) - Body ground Always

Below 1 ohms

Tester Connection

Switch Condition Specified Condition

D10-1 (+B) - D10-4 (GND) Ignition switch ON

11 to 14 V

D25-1 (+B) - D25-4 (GND) Ignition switch ON

11 to 14 V

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : Go To Next Step

2. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)

a. Disconnect the D10, D12, D14, D16, D19, D21, D23 or D25 ignition coil with igniter connector.

b. Disconnect the D74 ECM connector.

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

Fig. 139: Identifying Ignition Coil Assembly & ECM Connector Terminal

Standard resistance

D12-1 (+B) - D12-4 (GND) Ignition switch ON

11 to 14 V

D23-1 (+B) - D23-4 (GND) Ignition switch ON

11 to 14 V

D14-1 (+B) - D14-4 (GND) Ignition switch ON

11 to 14 V

D21-1 (+B) - D21-4 (GND) Ignition switch ON

11 to 14 V

D16-1 (+B) - D16-4 (GND) Ignition switch ON

11 to 14 V

D19-1 (+B) - D19-4 (GND) Ignition switch ON

11 to 14 V

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

STANDARD RESISTANCE SPECIFICATION

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : Go To Next Step

3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353, P0354, P0355, P0356,

P0357 OR P0358)

a. Connect the Techstream to the DLC3.

Tester Connection

Condition Specified Condition

D10-2 (IGF1) - D74-104 (IGF1)

Always

Below 1 ohms

D25-2 (IGF2) - D74-105 (IGF2)

Always

Below 1 ohms

D12-2 (IGF2) - D74-105 (IGF2)

Always

Below 1 ohms

D23-2 (IGF1) - D74-104 (IGF1)

Always

Below 1 ohms

D14-2 (IGF2) - D74-105 (IGF2)

Always

Below 1 ohms

D21-2 (IGF1) - D74-104 (IGF1)

Always

Below 1 ohms

D16-2 (IGF1) - D74-104 (IGF1)

Always

Below 1 ohms

D19-2 (IGF2) - D74-105 (IGF2)

Always

Below 1 ohms

D10-3 (IGT1) - D74-40 (IGT1)

Always

Below 1 ohms

D25-3 (IGT2) - D74-33 (IGT2)

Always

Below 1 ohms

D12-3 (IGT3) - D74-37 (IGT3)

Always

Below 1 ohms

D23-3 (IGT4) - D74-38 (IGT4)

Always

Below 1 ohms

D14-3 (IGT5) - D74-35 (IGT5)

Always

Below 1 ohms

D21-3 (IGT6) - D74-36 (IGT6)

Always

Below 1 ohms

D16-3 (IGT7) - D74-34 (IGT7)

Always

Below 1 ohms

D19-3 (IGT8) - D74-39 (IGT8)

Always

Below 1 ohms

D10-2 (IGF1) or D74-104 (IGF1) - Body ground Always

10 kohms or higher

D25-2 (IGF2) or D74-105 (IGF2) - Body ground Always

10 kohms or higher

D12-2 (IGF2) or D74-105 (IGF2) - Body ground Always

10 kohms or higher

D23-2 (IGF1) or D74-104 (IGF1) - Body ground Always

10 kohms or higher

D14-2 (IGF2) or D74-105 (IGF2) - Body ground Always

10 kohms or higher

D21-2 (IGF1) or D74-104 (IGF1) - Body ground Always

10 kohms or higher

D16-2 (IGF1) or D74-104 (IGF1) - Body ground Always

10 kohms or higher

D19-2 (IGF2) or D74-105 (IGF2) - Body ground Always

10 kohms or higher

D10-3 (IGT1) or D74-40 (IGT1) - Body ground

Always

10 kohms or higher

D25-3 (IGT2) or D74-33 (IGT2) - Body ground

Always

10 kohms or higher

D12-3 (IGT3) or D74-37 (IGT3) - Body ground

Always

10 kohms or higher

D23-3 (IGT4) or D74-38 (IGT4) - Body ground

Always

10 kohms or higher

D14-3 (IGT5) or D74-35 (IGT5) - Body ground

Always

10 kohms or higher

D21-3 (IGT6) or D74-36 (IGT6) - Body ground

Always

10 kohms or higher

D16-3 (IGT7) or D74-34 (IGT7) - Body ground

Always

10 kohms or higher

D19-3 (IGT8) or D74-39 (IGT8) - Body ground

Always

10 kohms or higher

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra