Toyota Tundra. Manual — part 1229

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

Case 1 and 4:

TYPICAL ENABLING CONDITIONS

Case 2:

TYPICAL ENABLING CONDITIONS

Case 3:

TYPICAL ENABLING CONDITIONS

Related DTCs

P1613: Secondary air injection system air injection control driver
circuit range check (bank 1)
P1614: Secondary air injection system air injection control driver
circuit range check (bank 2)

Required Sensors/Components
(Main)

Air injection control driver

Required Sensors/Components
(Related)

Air switching valve

Frequency of Operation

Once per drive cycle

Duration

3 seconds

MIL Operation

Immediate

Sequence of Operation

None

Monitor runs whenever following DTCs not present

None

Battery voltage

8 V or more

Ignition switch

ON

Starter

OFF

Monitor runs whenever following DTCs not present

None

Either a or b met:

-

a. Air pump

Not operating

b. Air switching valve

Not operating

Battery voltage

8 V or more

Ignition switch

ON

Starter

OFF

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

2008 Toyota Tundra

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

TYPICAL MALFUNCTION THRESHOLDS

Case 1:

TYPICAL MALFUNCTION THRESHOLDS

Case 2:

TYPICAL MALFUNCTION THRESHOLDS

Case 3:

TYPICAL MALFUNCTION THRESHOLDS

Case 4:

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

COMPONENT OPERATING RANGE

WIRING DIAGRAM

Refer to DTC P0412 .

INSPECTION PROCEDURE

HINT:

Diagnostic information output by the AID can be confirmed by connecting an oscilloscope to the diagnostic

Ignition switch

ON

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

0%

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
injection system operating.
0% when secondary air injection system not operating.

2008 Toyota Tundra

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

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.

ECM COMMANDS CHART

NOTE:



This Air Injection Check*2 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*2 repetitively 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
ON or the engine running.



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

AID Diagnostic Signal

Waveform

ECM Commands

DTCs

(ECM

Output)

Suspected Trouble Area

Any Air Injection

(AIR) System

operation

P1613
P1614



Open in diagnostic signal
circuit



Air Injection Control Driver
(AID)



Open in AID +B circuit (AID
power source)



Short between +B and
diagnostic signal circuits

AIR System: ON

(Air pump ON,

ASV ON)

P1613
P1614



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



Open in AID ground circuit



Short between diagnostic
signal circuit and body ground



AID



ECM

2008 Toyota Tundra

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

AIR System: OFF

(Air pump OFF,

ASV OFF)

-

Normal

Air Pump: ON

P0418
P0419



Short between air pump drive
circuit and body ground



Harness and connector (AID -
Pump)



Air pump



AID



ECM

Air Pump: OFF

P0418
P0419



Open in air pump drive circuit
(AID - Pump), or short
between air pump drive
circuit and +B



Harness and connector (AID -
Pump)



Air pump



AID



ECM

ASV: ON

P0412
P0415



Short between ASV drive
circuit and body ground



Harness and connector (AID -
ASV)



ASV



AID



ECM

ASV: OFF

P0412
P0415



Open in ASV drive circuit
(AID - ASV), or short
between ASV drive circuit
and +B



Harness and connector (AID -
ASV)



AID



ASV



ECM

AIR System: OFF

(Air pump OFF,

ASV OFF)

P1613
P1614



AID



ECM

AIR System: ON

(Air pump ON,

-

Normal

2008 Toyota Tundra

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