Toyota Tundra (2015 year). Manual — part 1946
A
OK
INSPECTION PROCEDURE
HINT:
The following conditions may also cause DTC P0505 to be set:
The floor carpet overlapping slightly onto the accelerator pedal, causing the accelerator
pedal to be slightly depressed and therefore the throttle valve position to be slightly open.
a.
The accelerator pedal being not fully released.
b.
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.
PROCEDURE
1.
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0505)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(e) Read DTCs.
Result
RESULT
PROCEED TO
P0505 is output
A
P0505 and other DTCs are output
B
HINT:
If any DTCs other than P0505 are output, troubleshoot those DTCs first.
B
GO TO DTC CHART
2.
CHECK PCV HOSE CONNECTIONS
(a) Check the PCV hose connections.
OK:
PCV hose is connected correctly and is not damaged.
NG
REPAIR OR REPLACE PCV HOSE
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0505; Idle Co...
OK
3.
CHECK AIR INDUCTION SYSTEM
(a) Check the air induction system for vacuum leakage
.
OK:
No leakage from air induction system.
HINT:
Perform "Inspection After Repair" after repairing or replacing the air induction system
.
NG
REPAIR OR REPLACE AIR INDUCTION SYSTEM
4.
CHECK THROTTLE VALVE
(a) Check the throttle valve condition.
OK:
Throttle valve is not contaminated with foreign objects and moves smoothly.
HINT:
Perform "Inspection After Repair" after replacing the throttle body assembly
.
NG
REPLACE THROTTLE BODY ASSEMBLY
OK
REPLACE ECM
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0505; Idle Co...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000002U1303XX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P050A; Cold Start Idle Air Control System
Performance; 2015 MY Tundra [08/2014 - ]
DTC
P050A
Cold Start Idle Air Control System Performance
DESCRIPTION
This monitor will run when the engine is started with the engine coolant temperature at -10 to 50°C (14 to
122°F). The DTC will be set after the engine idles for 13 seconds (2 trip detection logic).
The DTC is designed to monitor the idle air control at cold start. When the engine is started with the engine
coolant temperature at lower than 50°C (122°F), the ECM (PCM) measures the accumulated mass air flow at
engine idling. If it does not reach the criteria within 10 seconds, the ECM (PCM) interprets this as a
malfunction. The MIL is illuminated and a DTC is set when the malfunction is detected in consecutive driving
cycles (2 trip detection logic).
The ETCS (Electronic Throttle Control System) controls the idle speed. The ETCS operates the throttle actuator
to open and close the throttle valve, and adjusts the intake air amount to achieve the target idle speed.
NOTICE:
When the negative battery terminal is disconnected during inspections or repairs, the ISC (Idle Speed
Control) learning values are cleared. This DTC cannot be set with the ISC learning values cleared.
The ISC learning is performed when the engine is warmed up and has been idling for 5 minutes.
DTC CODE
DTC DETECTION CONDITION
TROUBLE AREA
P050A
Insufficient mass air flow at cold start
(2 trip detection logic)
Throttle body
Mass air flow meter
PCV hose
Air cleaner filter
Air induction system
VVT system
ECM
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P050A; Cold S...
DTC CODE
DTC DETECTION CONDITION
TROUBLE AREA
Wire harness or connector
MONITOR STRATEGY
Related DTCs
P050A: Cold start idle air speed control system
Required sensors/Components (Main)
Throttle body
Required sensors/Components (Related)
Mass air flow meter
Engine coolant temperature sensor
Duration
10 seconds
MIL operation
2 driving cycles
TYPICAL ENABLING CONDITIONS
Monitor runs whenever
following DTCs not present
P0010, P0020 (VVT oil control valve)
P0011, P0021 (VVT system - Advance)
P0012, P0022 (VVT system - Retard)
P0013, P0023 (Exhaust VVT oil control valve)
P0014, P0024 (Exhaust VVT system - Advance)
P0015, P0025 (Exhaust VVT system - Retard)
P0016, P0018 (VVT system - Misalignment)
P0017, P0019 (Exhaust VVT system - Misalignment)
P0102, P0103 (Mass air flow meter)
P0115, P0117, P0118 (Engine coolant temperature sensor)
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle position
sensor)
P0125 (Insufficient Coolant Temperature for Closed Loop Fuel Control)
P014C, P014D, P014E, P014F, P015A, P015B, P015C, P015D, P2195, P2196,
P2197, P2198, P2237, P2238, P2239, P2240, P2241, P2242, P2252, P2253,
P2255, P2256 (Air fuel ratio sensor)
P0171, P0172, P0174, P0175 (Fuel system)
P0301 - P0308 (Misfire)
P0335 (Crankshaft position sensor)
P0340, P0342, P0343, P0345, P0347, P0348 (VVT sensor)
P0340, P1340 (Camshaft position sensor)
P0351 - P0358 (Igniter)
P0365, P0367, P0368, P0390, P0392, P0393 (Exhaust VVT sensor)
P0500 (Vehicle speed sensor)
P219A, P219B, P219C, P219D, P219E, P219F, P21A0, P21A1, P21A2, P21A3
(Air-fuel ratio imbalance)
Battery voltage
8 V or more
Time after engine start
3 seconds or more
Starter
OFF
ECT at engine start
-10°C (14°F) or more
ECT
-10 to 50°C (14 to 122°F)
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P050A; Cold S...
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