Toyota Tundra. Manual — part 1454

1. CHECK INJECTOR ASSEMBLY (POWER SOURCE)

a. Disconnect the fuel injector connector.

b. Turn the ignition switch to ON.

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

Standard voltage

STANDARD VOLTAGE SPECIFICATION

Fig. 297: Identifying Fuel Injector Connector

NG : Go to step 6

OK : Go to Next Step

2. INSPECT FUEL INJECTOR ASSEMBLY

a. Inspect the fuel injector. (See ON-VEHICLE INSPECTION ).

NG : REPLACE FUEL INJECTOR ASSEMBLY . (See FUEL INJECTOR ).

OK : Go to Next Step

Cylinder Tester Connection Switch Condition Specified Condition

No. 1

D11-1 - Ground

Ignition switch ON

11 to 14 V

No. 2

D26-1 - Ground

Ignition switch ON

11 to 14 V

No. 3

D13-1 - Ground

ignition switch ON

11 to 14 V

No. 4

D24-1 - Ground

Ignition switch ON

11 to 14 V

No. 5

D15-1 - Ground

Ignition switch ON

11 to 14 V

No. 6

D22-1 - Ground

Ignition switch ON

11 to 14 V

No. 7

D17-1 - Ground

Ignition switch ON

11 to 14 V

No. 8

D20-1 - Ground

Ignition switch ON

11 to 14 V

2008 Toyota Tundra

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

3. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)

a. Disconnect the fuel injector connector.

b. Disconnect the ECM connector.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

Cylinder

Tester Connection

Condition Specified Condition

No. 1

D11-2 - Body ground

Always

10 kohms or higher

D11-2 - D74-86 (#10)

Always

Below 1 ohms

No. 2

D26-2 - Body ground

Always

10 kohms or higher

D26-2 - D74-109 (#20) Always

Below 1 ohms

No. 3

D13-2 - Body ground

Always

10 kohms or higher

D13-2 - D74-85 (#30)

Always

Below 1 ohms

No. 4

D24-2 - Body ground

Always

10 kohms or higher

D24-2 - D74-108 (#40) Always

Below 1 ohms

No. 5

D15-2 - Body ground

Always

10 kohms or higher

D15-2 - D74-84 (#50)

Always

Below 1 ohms

No. 6

D22-2 - Body ground

Always

10 kohms or higher

D22-2 - D74-107 (#60) Always

Below 1 ohms

No. 7

D17-2 - Body ground

Always

10 kohms or higher

D17-2 - D74-83 (#70)

Always

Below 1 ohms

No. 8

D20-2 - Body ground

Always

10 kohms or higher

D20-2 - D74-106 (#80) Always

Below 1 ohms

2008 Toyota Tundra

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

Fig. 298: Identifying Fuel Injector Assembly & ECM Connectors

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : Go to Next Step

4. REPLACE ECM

a. Replace the ECM (See REMOVAL ).

5. CHECK PROBLEM SYMPTOM DISAPPEARS

a. Check if the problem symptom disappears.

Result

RESULT REFERENCE

Result

Proceed To

Problem symptom disappears

A

2008 Toyota Tundra

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

B : GO TO PROBLEM SYMPTOMS TABLE

A : END

6. INSPECT FUSE (INJ)

a. Remove the INJ fuse from the engine room relay block.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

Fig. 299: Identifying INJ Fuse

NG : CHECK FOR SHORT IN ALL HARNESSES AND CONNECTORS CONNECTED TO
FUSE AND REPLACE FUSE

OK : Go to Next Step

7. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - INTEGRATION

RELAY)

a. Disconnect the fuel injector connector.

b. Remove the integration relay from the engine room relay block.

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

Standard resistance

Problem symptom does not disappear

B

Tester Connection Condition Specified Condition

INJ fuse

Always

Below 1 ohms

2008 Toyota Tundra

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