Toyota Tundra. Manual — part 1230

HINT:



By using the Techstream to perform the Air Injection Check operation in the System Check, the air-fuel
ratio and the pressure in the secondary air injection system passage can be checked while the secondary
air injection system is operating. This helps technicians to troubleshoot the system when it malfunctions.



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. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1613 OR P1614)

a. Connect the Techstream to the DLC3.

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

c. Enter the following menus: Powertrain/Engine and ECT/Trouble Codes.

d. Read DTCs.

Result

RESULT CHART

HINT:

If any DTCs other than P1613 and P1614 are output, troubleshoot those DTCs first.

B : GO TO DTC CHART (See DIAGNOSTIC TROUBLE CODE CHART )

A : Go to next step.

2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

a. Disconnect the D51 or D55 air injection control driver (AID) connector.

ASV ON)

Other than above (other than 0, 20,

40, 80 and 100% duty)

-

P1613
P1614



AID



Open in AID ground circuit

Display (DTC Output)

Proceed To

P1613 and/or P1614

A

P1613 and/or P1614 and other DTCs

B

2008 Toyota Tundra

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

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig. 184: Identifying D51 Or D55 Air Injection Control Driver (AID) Connector Terminals

OK : Go to next step.

3. CHECK HARNESS AND CONNECTOR (AID - ECM, BODY GROUND)

a. Disconnect the A24 or D74 ECM connector.

b. Disconnect the D55 or D51 AID connector.

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

Tester Connection

Switch Condition

Specified Condition

D55-5 (+B) - Body ground Ignition switch ON 11 to 14 V (near battery voltage)

D51-5 (+B2) - Body ground Ignition switch ON 11 to 14 V (near battery voltage)

2008 Toyota Tundra

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

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

Tester Connection

Condition Specified Condition

D74-54 (AIRP) - D55-4 (SIP)

Always

Below 1 ohms

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

Always

Below 1 ohms

D74-53 (ARP2) - D51-4 (SIP2)

Always

Below 1 ohms

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

Below 1 ohms

D74-30 (AIDI) - D55-2 (DI)

Always

Below 1 ohms

D74-29 (AID2) - D51-2 (DI2)

Always

Below 1 ohms

D55-1 (E) - Body ground

Always

Below 1 ohms

D51-1 (E2) - Body ground

Always

Below 1 ohms

Tester Connection

Condition Specified Condition

D74-S4 (AIRP) or D55-4 (SIP) - Body ground

Always

10 kohms or higher

D74-28 (AIRV) or D55-3 (SIV) - Body ground

Always

10 kohms or higher

D74-53 (ARP2) or D51-4 (SIP2) - Body ground

Always

10 kohms or higher

A24-43 (ARV2) or D51-3 (SIV2) - Body ground Always

10 kohms or higher

D74-30 (AIDI) or D55-2 (DI) - Body ground

Always

10 kohms or higher

D74-29 (AID2) or D51-2 (DI2) - Body ground

Always

10 kohms or higher

2008 Toyota Tundra

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

Fig. 185: Checking Harness & Connector (AID - ECM, Body Ground)

2008 Toyota Tundra

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