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Toyota Tundra. Manual - part 1596

TYPICAL ENABLING CONDITIONS - CASE 3

TYPICAL MALFUNCTION THRESHOLDS

Case 1:

TYPICAL MALFUNCTION THRESHOLDS CONDITIONS - CASE 1

Case 2:

TYPICAL MALFUNCTION THRESHOLDS CONDITIONS - CASE 2

Case 3:

TYPICAL MALFUNCTION THRESHOLDS CONDITIONS - CASE 3

Case 4:

TYPICAL MALFUNCTION THRESHOLDS CONDITIONS - CASE 4

COMPONENT OPERATING RANGE

WIRING DIAGRAM

Monitor runs whenever following DTCs not present

None

Following conditions (a) and (b) met

a. Air pump

Operating

b. Air switching valve

Operating

Battery voltage

8 V or more

gnition switch

Starter

OFF

One of following conditions met

A, B, C or D

A. Diagnostic signal duty ratio from air injection control driver

1 % or more, and 10% or less

B. Diagnostic signal duty ratio from air injection control driver

30%

C. Diagnostic signal duty ratio from air injection control driver

49%

D. Diagnostic signal duty ratio from air injection control driver

91% or more, and 99% or less

Diagnostic signal duty ratio from air injection control driver

70% or more, and 90% or less

Diagnostic signal duty ratio from air injection control driver

100%

Diagnostic signal duty ratio from air injection
control driver

70% or more, and 90% or less when secondary air

njection system operating.

0% when secondary air injection system not operating.

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Refer to DTC P0412 .

INSPECTION PROCEDURE

HINT

Diagnostic information output by the AID can be confirmed by connecting an oscilloscope to the diagnostic
information terminal of the AID. Reading the waveform while performing the AIR system intrusive operation
provided in the System Check function, allows the possible trouble areas to be narrowed down.

AID DIAGNOSTIC INFORMATIONS

NOTE:



This Air Injection Check only allows technicians to operate the AIR system
for a maximum of 5 seconds. Furthermore, the check can only be
performed up to 4 times per trip. If the test is repeated, intervals of at least
30 seconds are required between checks. While AIR system operation
using the Techstream is prohibited, the Techstream display indicates the
prohibition (WAIT or ERROR).

If an ERROR is displayed on the Techstream during the test, stop the
engine for 10 minutes, and then try again.



Performing the Air Injection Check repeatedly may cause damage to the
AIR system. If necessary, leave an interval of several minutes between
System Check operations to prevent the system from overheating.



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



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

AID Diagnostic Signal Waveforms

ECM Commands

DTCs

(ECM

Output)

Suspected Trouble Areas

100% Duty

Ratio

Any Secondary Air

Injection (AIR)

System operation

P1613
P1614



Open in diagnostic signal
circuit



Air Injection Control
Driver (AID)



Open in AID BATT circuit



Short between +B and
diagnostic signal circuits

0% Duty Ratio

AIR System ON

P1613



Open or short in air pump
or Air Switching Valve
(ASV) command signal
circuit (ECM - AID)

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Ratio

(Air pump ON,

ASV ON)

P1614



Short between diagnostic
signal circuit and body
ground



AID



ECM

0% Duty

Ratio

AIR System OFF

(Air pump OFF,

ASV OFF)

Normal

20% Duty

Ratio

Air Pump ON

P0418
P0419



Short between air pump
drive circuit and body
ground



Harness and connector
(AID - Pump)



Air pump



AID



ECM

20% Duty

Ratio

Air Pump OFF

P0418
P0419



Open in air pump drive
circuit (AID - Pump)



Harness and connector
(AID - Pump)



Air pump



AID



ECM

40% Duty

Ratio

ASV ON

P0412
P0415



Short between ASV drive
circuit and body ground



Harness and connector
(AID - ASV)



ASV



AID



ECM

40% Duty

Ratio

ASV OFF

P0412
P0415



Open in ASV drive circuit
(AID - ASV)



Harness and connector
(AID - ASV)



AID



ASV



ECM

80% Duty Ratio

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

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 to ON and turn the Techstream ON.

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

d. Read DTCs.

Result

DTC OUTPUT RESULT

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

B: GO TO DTC CHART

A: Go to Next Step

Ratio

AIR System OFF

(Air pump OFF,

ASV OFF)

P1613
P1614



AID



ECM

80% Duty

Ratio

AIR System ON

(Air pump ON,

ASV ON)

Normal

Other than above (other than 0, 20,
40, 80 and 100% duty)

P1613
P1614



AID



Open in AID ground
circuit

Result

Proceed to

P1613 and/or P1614 are output

P1613 and/or P1614 and other DTCs are output

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

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