Look for output diagnostic trouble codes (dtcs) (from the dtc checks) in the appropriate section's diagnostic trouble code chart. Use the chart to determine the trouble area and the proper inspection procedure. A description of each of the chart's columns are below.
| Item | Description |
| Dtc no. | Indicates the diagnostic trouble code |
| Detection item | Indicates the system or details of the problem |
| Trouble area | Indicates the suspected areas of the problem |
| See page | Indicates the page where the inspection procedures for each circuit are to be found, or gives instruction for checking and repairs |
Symptom simulation
Problem symptoms tableDtc check / clear
Notice:
When the diagnosis system is changed from normal
mode to check mode or vice versa, all dtcs and freeze
frame data recorded in normal mode are erased. Before
changing modes, always check and make a note of any
dtcs and freeze frame data.
Hint:
Dtcs which are stored in the ecm can be ...
Catalyst monitor (active air-fuel ratio control type)
Preconditions
The monitor will not run unless:
The mil is off.
Drive pattern
Connect the intelligent tester to the dlc3.
Turn the ignition switch on.
Turn the tester on.
Clear dtcs (if set) (see page es-35).
Start the engine and warm it up.
Drive the vehicle at be ...
Oxygen (a/f) sensor pumping current circuit
Description
Refer to dtc p2195 (see page es-292).
Monitor description
The air-fuel ratio (a/f) sensor varies its output voltage in proportion to
the air-fuel ratio. If the a/f sensor
impedance (alternating current resistance) or output voltage deviates greatly
from the standard range ...