Toyota Tundra. Manual — part 1200

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
from the time the malfunction occurred.

1. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)

a. Disconnect the ignition coil connector.

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

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION

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

Fig. 133: Identifying Ignition Coil Connector Terminals

Standard voltage (Check for open)

TESTER CONNECTION SPECIFIED CONDITION

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

Tester Connection

Switch Condition Specified Condition

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-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 ignition coil connector.

b. Disconnect the D74 ECM connector.

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

Standard resistance (Check for open)

TESTER CONNECTION 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

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

Tester Connection

Condition Specified Condition

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

Below 1 ohms

D25-2 (IGF) - D74-104 (IGF1) Always

Below 1 ohms

D12-2 (IGF) - D74-104 (IGF1) Always

Below 1 ohms

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

Below 1 ohms

D14-2 (IGF) - D74-104 (IGF1) Always

Below 1 ohms

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

Below 1 ohms

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

Below 1 ohms

D25-3 (IGT2) - D74-39 (IGT2) Always

Below 1 ohms

D12-3 (IGT3) - D74-38 (IGT3) Always

Below 1 ohms

D23-3 (IGT4) - D74-37 (IGT4) Always

Below 1 ohms

D14-3 (IGT5) - D74-36 (IGT5) Always

Below 1 ohms

D21-3 (IGT6) - D74-35 (IGT6) Always

Below 1 ohms

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Fig. 134: Identifying D74 ECM Connector

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : Go to next step

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

P0356)

Tester Connection

Condition Specified Condition

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

10 kohms or higher

D25-2 (IGF) or D74-104 (IGF1) - Body ground Always

10 kohms or higher

D12-2 (IGF) or D74-104 (IGF1) - Body ground Always

10 kohms or higher

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

10 kohms or higher

D14-2 (IGF) or D74-104 (IGF1) - Body ground Always

10 kohms or higher

D21-2 (IGF) or D74-104 (IGF1) - 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 D74-39 (IGT2) - Body ground Always

10 kohms or higher

D12-3 (IGT3) or D74-38 (IGT3) - Body ground Always

10 kohms or higher

D23-3 (IGT4) or D74-37 (IGT4) - Body ground Always

10 kohms or higher

D14-3 (IGT5) or D74-36 (IGT5) - Body ground Always

10 kohms or higher

D21-3 (IGT6) or D74-35 (IGT6) - Body ground Always

10 kohms or higher

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch ON and turn the Techstream ON.

c. Clear DTCs (See DTC CHECK/CLEAR ).

d. Shuffle arrangement of the ignition coils (among No. 1 to No. 6 cylinders).

e. Perform a simulation test.

f. Check DTCs displayed on the Techstream.

Result

RESULT CHART

B : REPLACE IGNITION COIL ASSEMBLY . (See IGNITION COIL AND SPARK PLUG ).

A : REPLACE ECM . (See REMOVAL).

DTC P0412 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE "A" CIRCUIT; DTC
P0415 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE "B" CIRCUIT

DESCRIPTION

The Secondary Air Injection (AIR) system consists of an air pump, the Air Switching Valve (ASV), a pressure
sensor, the Air Injection Control Driver (AID) and the ECM. For a short time after cold engine starts, the AIR
system pumps secondary air to the exhaust port of the cylinder head to purify the exhaust emissions. The
secondary air is supplied by the air pump and is pumped to the exhaust port through the ASV.

The AID drives the ASV and the air pump according to command signals transmitted by the ECM. The pressure
sensor detects the pressure in the secondary air passage when the AIR system is ON and OFF, and transmits a
pressure signal to the ECM.

The AID is not only equipped to drive the pump and valve, but also with a diagnosis function to detect
malfunctions in the AIR system circuit.

HINT:

As a large current is required to drive the air pump and ASV, an AID is installed to this system.

NOTE:

Do not shuffle the connectors.

Display (DTC Output)

Proceed To

Same DTC output

A

Different ignition coil DTC output

B

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra