Federal

CIRCUIT DIAGRAM





INSPECTION USING SCAN TOOL








HARNESS INSPECTION PROCEDURE

COMPONENT TEST PROCEDURE

CAUTION: Before checking, warm up the engine until engine coolant temperature reaches 85 to 95°C (185 to 203°F). Use an accurate digital voltmeter.

1 Disconnect the oxygen sensor connector and connect a volt-meter to the oxygen sensor connector.
2 While repeating engine racing, measure the oxygen sensor output voltage.

Output Voltage, Engine Racing: 0.6 - 1.0 Volts

TROUBLESHOOTING HINTS
- The exhaust gas purification performance will worsen if there is a malfunction of the heated oxygen sensor .
- If the heated oxygen sensor output voltage deviates from the standard value even though the results of the checking of the heated oxygen sensor are normal, the cause is probably a malfunction of a component related to mixture control.
[Examples]
- Malfunction of an injector.
- Air leakage into the intake manifold from a leaking gasket.
- Malfunction of the volume air flow sensor, the intake air temperature sensor, the barometric pressure sensor, or the engine coolant temperature sensor .