Toyota Tundra. Manual — part 1277

e. Check that the MIL turns OFF.

Standard: MIL turns OFF.

NG : Go to step 3

OK : REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

3. CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS)

a. Disconnect the A24 ECM connector.

b. Turn the ignition switch ON.

c. Check that the MIL is not illuminated.

OK: MIL is not illuminated.

d. Reconnect the ECM connector.

NG : Go to step 4

Fig. 288: Identifying A24 ECM Connector Terminals

OK : REPLACE ECM (See REMOVAL )

4. CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)

a. Disconnect the A24 ECM connector.

b. Disconnect the J28 combination meter connector.

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

Standard resistance (Check for open)

2008 Toyota Tundra

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

TESTER CONNECTION SPECIFIED CONDITION

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

d. Reconnect the ECM connector.

e. Reconnect the combination meter connector.

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig. 289: Identifying A24 ECM Connector & J28 Combination Meter Connector

OK : REPLACE COMBINATION METER ASSEMBLY . (See COMBINATION METER ).

5. CHECK THAT MIL IS ILLUMINATED

a. Check if the MIL is illuminated when the ignition switch is turned ON.

OK: MIL should be illuminated.

NG : Go to step 6

Tester Connection

Condition Specified Condition

J28-5 (CHK) - A24-24 (W) Always

Below 1 ohms

Tester Connection

Condition Specified Condition

J28-5 (CHK) or A24-24 (W) - Body ground Always

10 kohms or higher

2008 Toyota Tundra

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

OK : SYSTEM OK

6. CHECK THAT ENGINE STARTS

a. Turn the ignition switch ON.

b. Start the engine.

Result

RESULT CHART

B : GO TO VC OUTPUT CIRCUIT

A : Go to next step.

7. INSPECT COMBINATION METER ASSEMBLY (MIL CIRCUIT)

a. See the combination meter troubleshooting procedure. (See HOW TO PROCEED WITH

TROUBLESHOOTING ).

NG : REPLACE COMBINATION METER ASSEMBLY . (See COMBINATION METER ).

OK : REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION METER - ECM)

CAMSHAFT OIL CONTROL VALVE

COMPONENTS

Result

Proceed To

Engine starts

A

Engine does not start*

B

HINT:
*: The Techstream cannot communicate with the ECM.

2008 Toyota Tundra

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

Fig. 290: Identifying Camshaft Oil Control Valve Replacement Components & Torque Specifications (1
Of 3)

2008 Toyota Tundra

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