Toyota Tundra. Manual — part 1380
The ECM sets the DTC based on diagnostic signals from the AID.
MONITOR STRATEGY
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
Case 1:
TYPICAL ENABLING CONDITIONS - CASE 1
Case 2:
TYPICAL ENABLING CONDITIONS - CASE 2
Related DTCs
P0418: Secondary air injection system air pump circuit range
check (bank 1)
P0419: Secondary air injection system air pump circuit range
check (bank 2)
Required Sensors/Components
(Main)
Air injection control driver
Required Sensors/Components
(Related)
Air pump
Frequency of Operation
Once per drive cycle
Duration
3 seconds
MIL Operation
Immediate
Sequence of Operation
None
Monitor runs whenever following DTCs not present
-
Secondary air injection pump
Operating
Secondary air injection switching valve
Operating
Battery voltage
8 V or higher
Ignition switch
ON
Time after ignition switch off to ON
0.5 seconds or more
Starter
OFF
Time after starter turned from ON to OFF
0.5 seconds or more
Monitor runs whenever following DTCs not present
-
Secondary air injection pump
Not operating
Secondary air injection switching valve
Not operating
Battery voltage
8 V or higher
Ignition switch
ON
Time after ignition switch off to ON
0.5 seconds or more
Starter
OFF
Time after starter turned from ON to OFF
0.5 seconds or more
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra
TYPICAL MALFUNCTION THRESHOLDS
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
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 SIGNAL WAVEFORMS REFERENCE
Diagnostic signal duty ratio from air injection control driver
11% or more, and 29% or less
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.
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 or 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
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra
Any Secondary Air
Injection (AIR)
System operation
P1613
P1614
Open in diagnostic signal
circuit
Air Injection Control Driver
(AID)
Open in AID BATT 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
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)
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
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - 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. INSPECT AIR PUMP ASSEMBLY
a. Disconnect the E10 or D57 air pump connector.
b. Measure the resistance according to the value (s) in the table below.
Standard resistance
STANDARD RESISTANCE SPECIFICATION
Result
RESULT REFERENCE
ECM
ASV: OFF
P0412
P0415
Open in ASV drive circuit
(AID-ASV)
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, ASV ON)
-
Normal
Other than above
(other than 0, 20, 40, 80 and
100% duty)
-
P1613
P1614
AID
Open in AID ground circuit
Tester Connection Condition Specified Condition
1-2
20°C (68°F)
0.44 to 1 ohms
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra
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