PGM-FI Control System — Troubleshooting Flowchart — Oxygen Sensor [With CATA]
6-24flowchartOxygen sensor troubleshooting flowchart for vehicles With CATA (catalytic converter).
Troubleshooting Flowchart — Oxygen Sensor [With CATA]
NOTE
Self-diagnosis LED blinks once: A problem in the Oxygen (O2) Sensor circuit.
1
- Check Engine warning light has been reported on. - LED indicates CODE 1.
2
Turn the ignition switch OFF.
3
Remove HAZARD fuse in the main fuse box for 10 seconds to reset ECU.
4
Inspect pressure regulator (page 6-76).
5
Is it normal ?
NO
Replace the pressure regulator (page 6-77).
YES
6
Warm up engine to normal operating temperature (cooling fan comes on).
7
Hold engine at 1500 min-1 (rpm) for 15 minutes. NOTE: Do not close throttle completely during this time.
8
Is Check Engine warning light on ? Does LED indicate CODE 1 ?
NO
Intermittent failure (test drive may be necessary).
YES
(To page 6-25)