Toyota Tundra (2015 year). Manual — part 1969
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear DTCs
.
(e) Start the engine.
(f) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
(g) Read DTCs.
Result
RESULT
PROCEED TO
No DTC is output
A
P1340, P1342 and/or P1343 are output
B
HINT:
If the engine does not start, replace the ECM.
B
REPLACE ECM
A
END
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1340,P1342...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM0000046N101DX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P144C,P144D; Open in Secondary Air Injection
System Heater Control Circuit; 2015 MY Tundra [08/2014 - ]
DTC
P144C
Open in Secondary Air Injection System Heater Control Circuit
DTC
P144D
Short in Secondary Air Injection System Heater Control Circuit
DESCRIPTION
The ECM operates the air pump heater relay which causes the air pump heater to operate.
DTC
NO.
DTC DETECTION CONDITION
TROUBLE AREA
P144C
Open or short in the air pump heater relay circuit for 5
seconds (1 trip detection logic).
Open or short in air pump
heater relay circuit
Air pump heater relay
ECM
P144D
Open or short in the air pump heater relay circuit for 5
seconds (1 trip detection logic).
Open or short in air pump
heater relay circuit
Air pump heater relay
ECM
MONITOR DESCRIPTION
These DTCs are designed to detect a malfunction in the air pump heater relay circuit. When the system is
The battery voltage is not applied to terminal HAI1 while the air pump heater relay is off.
The battery voltage is applied to terminal HAI1 while the air pump heater relay is on.
MONITOR STRATEGY
Related DTCs
P144C: Air pump heater relay circuit range check (Low voltage)
P144D: Air pump heater relay circuit range check (High voltage)
Required Sensors/Components (Main)
Air pump heater relay
Required Sensors/Components (Related)
-
Duration
5 seconds
MIL operation
Immediate
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P144C,P144D...
TYPICAL ENABLING CONDITIONS
Case 1
Monitor runs whenever following DTCs not stored
None
Current air pump heater relay (AIR PMP HTR)
ON
Last air pump heater relay (AIR PMP HTR)
ON
Battery voltage
8 V or more
Ignition switch
ON
Starter
OFF
Case 2
Monitor runs whenever following DTCs not stored
None
Current air pump heater relay (AIR PMP HTR)
OFF
Last air pump heater relay (AIR PMP HTR)
OFF
Battery voltage
8 V or more
Ignition switch
ON
Starter
OFF
TYPICAL MALFUNCTION THRESHOLDS
P144C
Air pump heater relay output terminal voltage
Low
P144D
Air pump heater relay output terminal voltage
High
CONFIRMATION DRIVING PATTERN
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P144C,P144D...
Connect the Techstream to the DLC3.
1.
Turn the ignition switch to ON and turn the Techstream on.
2.
Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).
3.
Turn the ignition switch off and wait for at least 30 seconds.
4.
Turn the ignition switch to ON and turn the Techstream on [A].
5.
Start the engine and wait 10 seconds or more [B].
6.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].
7.
Read the pending DTC.
HINT:
If a pending DTC is output, the system is malfunctioning.
If a pending DTC is not output, perform the following procedure.
8.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
9.
Input the DTC: P144C or P144D.
10.
Check the DTC judgment result.
TESTER
DISPLAY
DESCRIPTION
NORMAL
DTC judgment completed
System normal
ABNORMAL
DTC judgment completed
System abnormal
INCOMPLETE
DTC judgment not completed
Perform driving pattern after confirming DTC enabling conditions
N/A
Unable to perform DTC judgment
HINT:
If the judgment result shows ABNORMAL, the system has a malfunction.
11.
If the test result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and
check for permanent DTCs
.
HINT:
If a permanent DTC is output, the system is malfunctioning.
If no permanent DTC is output, the system is normal.
12.
WIRING DIAGRAM
Refer to DTC P0412
.
INSPECTION PROCEDURE
NOTICE:
Read freeze frame data using the intelligent tester. 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.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P144C,P144D...
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