Toyota Corolla Repair Manual: Inspection procedure
Hint
:
- if different dtcs related to different systems that have terminal e2
as the ground terminal are output
simultaneously, terminal e2 may be open.
- 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 useful for determining
whether the vehicle was running or stopped, the engine was warmed up or not,
the air–fuel ratio
was lean or rich, etc. At the time of the malfunction.
1 Inspect heated oxygen sensor(heater resistance)
- Disconnect the h5 or h8 heated oxygen sensor connector.
- measure the resistance between the terminals of the
heated oxygen sensor connector.

Standard:

- Reconnect the heated oxygen sensor connector.


2 Inspect efi relay
- Remove the efi relay from the engine room r/b.
- check for continuity in the efi relay.

Standard:

- Reinstall the efi relay.


3 Inspect ecm(ht1a or ht1b voltage)
- Turn the ignition switch on.
- measure the voltage between the applicable terminals of
the e4 and e5 ecm connectors.

Standard:



4 Check harness and connector(heated oxygen sensor – ecm,
heated oxygen sensor – efi relay)
- Check the harness and connector between the ecm and
heated oxygen sensor connectors.
- Disconnect the h5 or h8 heated oxygen sensor
connector.
- Disconnect the e4 or e5 ecm connector.
- Check the resistance between the wire harness
side connectors.

Standard (check for open):

Standard (check for short):


- Reconnect the heated oxygen sensor connector.
- Reconnect the ecm connector.
- check the harness and connector between the heated
oxygen sensor connector and efi relay.
- Disconnect the h5 or h8 heated oxygen sensor
connector.
- Remove the efi relay from the engine room r/b.
- Check the resistance between the wire harness
side connectors.

Standard (check for open):

Standard (check for short):

- Reconnect the heated oxygen sensor connector.
- Reinstall the efi relay.


Replace ecm
Refer to dtc p0130
Hint:
the ecm provides a pulse width modulated control circuit to adjust current
through the heater. The heated
oxygen sensor heater circuit uses a relay on the b+ side of the ...
Dtc p0100 mass or volume air flow circuit
Dtc p0102 mass or volume air flow circuit
low input
Dtc p0103 mass or volume air flow circuit
high input
Circuit description
The maf (mass air flow) sen ...
Other materials:
Removal & installation and disassembly & re
1. Remove bench type rear seat cushion assy (, 72–8)
2. Remove rear floor service hole cover
3. Work for preventing gasoline from spilling out
start the engine.
after the engine has stopped on the its own, turn the ignition
switch to lock.
4. Disconnect fuel tank main tube ...
Sockets
General information
The total load of all sockets must not exceed
140 watts at 12 volts.
Do not damage the socket by using non-compatible
connectors.
Safety information
Warning
Devices and cables in the unfolding area of the
airbags, such as portable navigation devices,
can hinder the unfolding of ...
Towing your vehicle with 4 wheels on the ground
To prevent damage to your vehicle, perform the following procedures before towing.
1 Shift the shift lever to N.
2 Turn the engine switch to the “ACC” position (without a smart key system) or
ACCESSORY mode (with a smart key system).
(, 166) Ensure that the audio system and other powered device ...