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
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
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
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
A
P1613 and/or P1614 and other DTCs are output
B
2009 Toyota Tundra
2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
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