MPI – Troubleshooting
13-11
Code No. 22 Crank angle sensor system Probable cause
Range of Check
D Engine is cranking.
Set conditions
D Sensor output voltage does not change for 4 seconds (no pulse signal input.)
D Malfunction of the crank angle sensor
D Improper connector contact, open circuit or
short-circuited harness wire of the crank angle sensor
D Malfunction of the engine-ECU
Measure at the crank angle sensor connector A-51.
D Connect the connector. (Use the test harness: MD998478.)
D Voltage between 2 (black clip) and earth (Engine: cranking)
OK: 0.4–4.0 V
D Voltage between 2 (black clip) and earth (Engine: idling)
OK: 1.5–2.5 V
NG
OK
Replace the engine-ECU.
Measure at the crank angle sensor connector A-51.
D Disconnect the connector, and measure at the harness side.
1. Voltage between 3 and earth (Ignition switch: ON)
OK: System voltage
2. Voltage between 2 and earth (Ignition switch: ON)
OK: 4.8–5.2 V
3. Continuity between 1 and earth
OK: Continuity
OK
Check the following con-
nector: A-51
NG
Repair
OK
Check trouble symptom.
NG
Replace the crank angle sensor.
1. NG
Check the harness wire between the crank angle sensor and the
control relay connector, and repair if necessary.
2. NG
Check the following con-
nector: B-62
NG
Repair
OK
3. NG
Check trouble symptom.
NG
Check the harness wire
between the engine-ECU and
the crank angle sensor
connector.
NG
Repair
OK
Replace the engine-ECU.
Check the harness wire between the crank angle sensor and the
earth, and repair if necessary.
Code No. 23 Camshaft position sensor system Probable cause
Range of Check
D Ignition switch: ON
D Engine speed is approx. 50 r/min or more.
Set conditions
D Sensor output voltage does not change for 4 seconds (no pulse signal input.)
D Malfunction of the camshaft position sensor
D Improper connector contact, open circuit or
short-circuited harness wire of the camshaft position
sensor circuit
D Malfunction of the engine-ECU
Measure at the camshaft position sensor connector A-97.
D Connect the connector.
D Voltage between 2 and earth (Engine: cranking)
OK: 0.4–3.0 V
D Voltage between 2 and earth (Engine: idling)
OK: 0.5–2.0 V
OK
Replace the engine-ECU.
NG
Measure at the camshaft position sensor connector A-97.
D Disconnect the connector, and measure at the harness side.
1. Voltage between 3 and earth (Ignition switch: ON)
OK: System voltage
2. Voltage between 2 and earth (Ignition switch: ON)
OK: 4.8–5.2 V
3. Continuity between 1 and earth
OK: Continuity
1. NG
Check the harness wire between the camshaft position sensor
and the control relay connector, and repair if necessary.
2. NG
Check the following con-
nector: B-62
NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire
between the engine-ECU and
the camshaft position sensor
connector.
NG
Repair
OK
Replace the engine-ECU.
3. NG
Check the harness wire between the camshaft position sensor
and the earth, and repair if necessary.
OK
Check the following con-
nector: A-97
NG
Repair
OK
Check trouble symptom.
NG
Replace the camshaft position sensor.
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