Second - Toyota 2GR-FE Manual

DTC P050A
DTC P050B
DESCRIPTION
The Electronic Throttle Control System (ETCS) controls the engine idling speed. The ETCS operates the
throttle actuator to open and close the throttle valve, and adjusts the intake air amount to achieve the
target idling speed.
In addition, the ECM retards the ignition timing and the ETCS increases the intake air amount to quickly
increase the catalyst temperature at cold start to reduce emissions.
DTC No.
Accumulated intake air amount during 10 seconds of idling
P050A
after cold start, less than threshold (2 trip detection logic)
Ignition timing retard value insufficient for 5 seconds or more
P050B during 10 seconds of P050A monitoring at cold start (2 trip
detection logic)
MONITOR DESCRIPTION
Accumulated Intake Air Value
Pass Condition Detected
(g)
P050A Detected
Threshold
0
3
Engine Start
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
Cold Start Idle Air Control System Performance
Cold Start Ignition Timing Performance
DTC Detection Conditions
Ignition Timing

(Second)

10
Time
• Throttle body assembly
• Mass air flow meter
• Air induction system
• PCV hose connections
• VVT system
• Air cleaner filter element
• ECM
• Throttle body assembly
• Mass air flow meter
• Air induction system
• PCV hose connections
• VVT system
• Air cleaner filter element
• ECM
Advanced
Threshold
Pass Condition Detected
Retarded
3
Engine Start
ES–299
Trouble Areas
P050B Detected
5 or more
10
(Second)
Time
A112588E02
ES