Service Repair Manual

MPI SYSTEM
5. If the standard value is not achieved, or if the change is not
smooth, replace the ISC servo assembly.
No.1 Cylinder TDC Sensor And Crankshaft
Angle Sensor
1. Connect a voltmeter between terminals 1 and 2, and 1 and
3.
Terminal 1 : Sensor ground
Terminal 2 : Crank angle signal
Terminal 3 : No.1 TDC signal
2. Measure the output voltage of the terminals while cranking
the engine.
Sensor
No.1 cylinder
TDC sensor
Terminal
Ground
Voltage
0.2-1.2V
(The needle fluctuates)
Crankshaft
angle sensor
Ground
1.8-2.5V
3. When the voltage is abnormal, check the sensor power and
ground circuit, and if nothing unusual is found, disassemble
the distributor and check it.
Oxygen Sensor
NOTE
1) Before checking, warm up the engine until engine coolant
temperature reaches 80 to 95ºC (176 to 203ºF)
2) Use an accurate digital voltmeter.
1. Disconnect the oxygen sensor connector and connect a
voltmeter to the oxygen sensor connector.
2. While increasing engine RPM, measure the oxygen sensor
output voltage.
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