Toyota Tundra (2015 year). Manual — part 1949
RESULT
PROCEED TO
NORMAL (DTC is not output)
A
ABNORMAL (DTC P050A is output)
B
B
REPLACE ECM
A
END
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P050A; Cold S...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000002TZB074X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P050B; Cold Start Ignition Timing Performance; 2015
MY Tundra [08/2014 - ]
DTC
P050B
Cold Start Ignition Timing Performance
DESCRIPTION
The DTC is designed to monitor the ignition timing at cold start. When the engine is started at an engine
malfunction. The MIL is illuminated and a DTC is set when the malfunction is detected in consecutive driving
cycles (2 trip detection logic).
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.
HINT:
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
P050B
Insufficient ignition timing retard at cold start (2-trip
detection logic)
Throttle body assembly
Mass air flow meter
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P050B; Cold S...
DTC
CODE
DTC DETECTION CONDITION
TROUBLE AREA
PCV system
Air cleaner filter
element
Air induction system
VVT system
ECM
Wire harness or
connector
MONITOR STRATEGY
Related DTCs
P050B: Cold start ignition timing performance
Required Sensors/Components (Main)
Throttle body assembly
Required Sensors/Components (Related)
Mass air flow meter
Engine Coolant Temperature (ECT) 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)
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P050B; Cold S...
TYPICAL MALFUNCTION THRESHOLDS
Accumulated time when ignition timing retard value is cut off
10 seconds or more
CONFIRMATION DRIVING PATTERN
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.
Enter the following menu items: Powertrain / Engine and ECT / Data List / All Data / Coolant Temp.
6.
Start the engine and warm it up until the coolant temperature is the same as the coolant
temperature in the freeze frame data.
8.
Idle the engine for 1 minute or more [B].
9.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].
10.
Read the Pending DTCs.
HINT:
If a pending DTC is output, the system is malfunctioning.
If a pending DTC is not output, perform the following procedure.
11.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
12.
Input the DTC: P050B.
13.
Check the DTC judgment result.
TESTER
DISPLAY
DESCRIPTION
NORMAL
DTC judgment completed
System normal
ABNORMAL
DTC judgment completed
System abnormal
14.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P050B; Cold S...
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