Toyota Tundra. Manual — part 1434

c. Turn the ignition switch to ON.

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

Standard voltage

STANDARD VOLTAGE SPECIFICATION

D54-1 (E2) - Body ground Always

Below 1 ohms

Tester Connection

Switch Condition

Specified Condition

D48-1 (BATT) - Body ground Ignition switch ON 11 to 14 V (near battery voltage)
D50-5 (+B) - Body ground

Ignition switch ON 11 to 14 V (near battery voltage)

D52-1 (BAT2) - Body ground Ignition switch ON 11 to 14 V (near battery voltage)
D54-5 (+B2) - Body ground

Ignition switch ON 11 to 14 V (near battery voltage)

2008 Toyota Tundra

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

Fig. 239: Identifying D48, D50 Or D52 & D54 AID Connectors

2008 Toyota Tundra

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

NG : REPAIR OR REPLACE AIR INJECTION CONTROL DRIVER POWER SOURCE
CIRCUIT

OK : Go to Next Step

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

a. Disconnect the D74 ECM connector.

b. Disconnect the D50 or D54 AID connector.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection

Condition Specified Condition

D74-54 (AIRP) - D50-4 (SIP)

Always

Below 1 ohms

D74-53 (ARP2) - D54-4 (SIP2) Always

Below 1 ohms

2008 Toyota Tundra

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

Fig. 240: Identifying D74 ECM & D50 Or D54 AID Connector

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : Go to Next Step

10. REPLACE AIR INJECTION CONTROL DRIVER

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

11. CHECK WHETHER DTC OUTPUT RECURS (DTC P2444, P2445, P2446 AND/OR P2447)

a. Start the engine and warm it up.

2008 Toyota Tundra

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