Toyota Corolla Repair Manual: Circuit description
Refer to dtcs p0100
|
Dtc no. |
Dtc detection condition | Trouble area |
| P0101 | After engine is warmed up, conditions (a) to (d) continue for
more than 10 seconds (2 trip detection logic):
|
|
Conditions (a) and (b) continue for more than 6 seconds: (2 trip
detection logic)
|
Monitor description
The maf (mass air flow) sensor helps the ecm calculates the amount of air flowing through the throttle valve. The ecm uses this information to determine the fuel injection time and provides a proper air–fuel ratio.
Inside the maf sensor, there is a heated platinum wire exposed to the flow of intake air. By applying a specific current to the wire, the ecm heats this wire to a given temperature. The flow of incoming air cools the wire and an internal thermister, changing their resistance. To maintain a constant current value, the ecm varies the voltage applied to these components in the maf sensor. The voltage level is proportional to the air flow through the sensor and the ecm interprets this voltage as the intake air amount. If there is a defect in the sensor or an open or short circuit, the voltage level will deviate outside the normal operating range. The ecm interprets this deviation as a defect in the maf sensor and sets a dtc.
Example: if the voltage is more than 2.2 V at idle, or less than 0.4 V at idle off, the ecm interprets this as a defect in the maf sensor and sets a dtc.
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
Wiring diagram
Refer to dtc p0100
Mass or volume air flow circuit
range/performance problem
Dtc p0101 mass or volume air flow circuit
range/performance problem ...
Inspection procedure
Hint:
read freeze frame data using the hand-held tester or the obd ii scan tool.
Freeze frame data records the
engine conditions when a malfunction is detected. When troubleshooting, it is
usefu ...
Other materials:
Calling the message sender
Calls can be made to an e-mail/SMS/MMS message sender's phone number.
1 Display the “Message Inbox” screen.
2 Select the desired message.
3 Select .
4 Check that the “Call” screen is displayed.
■ Calling from a number within a message
Calls can be made to a number identified in a me ...
Automatic transaxle fluid (atm)
On–vehicle inspection
1. Check the fluid level
Hint:
drive the vehicle so that the engine and transaxle are at normal
operating temperature.
Fluid temperature: 70 – 80 °c (158 – 176 °f)
park the vehicle on a level surface and set the parking
brake.
with the engine idling ...
General information
There are many ecu controlled systems used in the corolla. In general, ecu
controlled system are considered
to be very intricate and require a high level of technical knowledge and expert
skill to troubleshoot.
The fact is, however, that if you proceed by inspecting the circuits one by one, ...