Summit Wagon FWD L4-1795cc 1.8L SOHC (1994)
Continuity: Should exist
4. Connect a volt meter to oxygen harness connector terminal A3.
5. Start engine and measure voltage at idle.
Voltage: System Voltage.
NOTE: After warm-up, No voltage will be present.
5. Raise engine speed to 5000 RPM and measure voltage.
Voltage: 0 Volts.
Osciloscope Test
OSCILLOSCOPE TEST
1. Connect scope pickup probe to the sensor terminal A1.
2. Warm engine to operating temperature and keep it running at 2,000 RPM, check the waveform on the scope. If scope pattern is not as depicted in
image, the sensor may be bad or there could be a fuel mixture problem. Refer to Computers and Control Systems/System Diagnosis/Diagnosis
by Symptom for further system troubleshooting before replacing the assembly. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Symptom Related Diagnostic Procedures
HARNESS TEST
Oxygen Sensor
