Toyota Corolla (E120): System too lean/rich
Dtc p0171 system too lean (bank 1)
Dtc p0172 system too rich (bank 1)
Other materials:
Inspection procedure
1 Check un–lock warning switch assy
Disconnect the key unlock warning switch connector.
check the continuity between the terminals of the key unlock
warning switch connector, as shown in the illustration
and table.
Standard:
2 Check wire harness (tvip ecu unlock warni ...
How to proceed with troubleshooting
The hand–held tester can be used at step 4, 6, 8 and 9.
1 Vehicle brought to workshop
2 Customer problem analysis
3 Warning light check
4 The dtcs check (present and past dtcs)
5 The dtcs chart
6 Circuit inspection
7 Repair
8 Clear the dtcs (present and past dtcs)
9 The dt ...
How to register a Bluetooth® device
1 Display the “Bluetooth* Setup” screen. *: Bluetooth is a registered trademark
of Bluetooth SIG, Inc.
2 Select “Add”.
3 When this screen is displayed, search for the device name displayed on this
screen on the screen of your Bluetooth® device.
For details about operating the Bluetoo ...