Toyota Tundra. Manual — part 1251

Fig. 217: Identifying D49, D51, D53 Or D55 Aid Connector Terminals

2008 Toyota Tundra

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

OK : Go to next step.

6. CHECK HARNESS AND CONNECTOR (ECM - AIR INJECTION CONTROL DRIVER)

a. Disconnect the A24 or D74 ECM connector.

b. Disconnect the D51 or D55 AID connector.

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

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

Tester Connection

Condition Specified Condition

D74-28 (AIRV) - D55-3 (SIV)

Always

Below 1 ohms

A24-43 (ARV2) - D51-3 (SIV2) Always

Below 1 ohms

2008 Toyota Tundra

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

Fig. 218: Identifying A24 Or D74 ECM Connector & D51 Or D55 AID Connector

2008 Toyota Tundra

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

OK : Go to next step.

7. REPLACE AIR INJECTION CONTROL DRIVER

a. Replace the air injection control driver. (See AIR INJECTION DRIVER ).

8. CHECK WHETHER DTC OUTPUT RECURS (DTC P2440, P2441, P2442 AND/OR P2443)

a. Start the engine and warm it up.

b. Turn the ignition switch OFF.

c. Connect the Techstream to the DLC3.

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

e. Clear DTCs (if set) (See DTC CHECK/CLEAR ).

f. Enter the following menus: Powertrain/Engine and ECT/Utility/Air Injection Check/Automatic

Mode.

g. Start the engine after the Techstream initialization is finished.

h. Perform the System Check operation by pressing Enter.

i. After operating the AIR system, press the Enter button to confirm the AIR system pending codes.

j. Check Pending.

k. Turn the ignition switch OFF.

OK: No pending DTC output.

NG : REPLACE ECM (See REMOVAL )

OK : END

9. INSPECT VACUUM HOSES (AIR SWITCHING VALVE - PRESSURE SENSOR)

OK: No blockage and no deformation in vacuum hose.

NG : REPAIR OR REPLACE VACUUM HOSE

OK : Go to next step.

10. INSPECT AIR SWITCHING VALVE ASSEMBLY (PRESSURE SENSOR) (See INSPECTION

PROCEDURE )

NG : REPLACE AIR SWITCHING VALVE ASSEMBLY . (See AIR SWITCHING VALVE ).

NOTE:



When performing the Air Injection Check operation after the
battery cable has been reconnected, wait for 7 minutes with the
ignition switch turned ON or the engine running.



Turn the ignition switch OFF when the Air Injection Check
operation finishes.

2008 Toyota Tundra

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