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Fault Code Nos.
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Fault Code No.: 12 Diagnostic Code No.: ---
Item: Crankshaft Position Sensor: No Normal Signals are received from the Crankshaft Position Sensor
Fail-Safe System: Unable to Start Engine | Unable to Drive Vehicle
Indicated: ---
Procedure: ---
Probable Cause of Confirmation of Service
Item Malfunction and Check Maintenance Job Completion
Item Malfunction and Check Maintenance Job Completion
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1
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Connection of Crankshaft Position Sensor Coupler.
Check the locking condition of the coupler. Disconnect the coupler and check the pins (bent or broken terminals and locking condition of the pins. |
Improperly connected
Connect the coupler securely or replace the wire harness. |
Crank the engine.
If, the Fault Code No. is NOT displayed, then Service is Complete. If however, the Fault Code No. is displayed, then Go To Item 2 below. |
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2
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Connection of ECU Coupler.
Check the locking condition of the coupler. Disconnect the coupler and check the pins (bent or broken terminals and locking condition of the pins. |
Improperly connected
Connect the coupler securely or replace the wire harness. |
Crank the engine.
If, the Fault Code No. is NOT displayed, then Service is Complete. If however, the Fault Code No. is displayed, then Go To Item 3 below. |
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3
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Wire Harness continuity.
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If there is an Open or Short Circuit, Replace the Wire Harness.
Between Crankshaft Position Sensor Coupler and ECU Coupler (Black/Blue-Black/Blue) Between Joint Coupler and ECU Coupler (Black/Blue-Black/Blue) |
Crank the engine.
If, the Fault Code No. is NOT displayed, then Service is Complete. If however, the Fault Code No. is displayed, then Go To Item 4 below. |
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4
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Installed condition of Crankshaft Position Sensor.
Check for looseness or pinching. |
Improperly installed Sensor
Reinstall or Replace the Sensor. |
Crank the engine.
If, the Fault Code No. is NOT displayed, then Service is Complete. If however, the Fault Code No. is displayed, then Go To Item 5 below. |
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5
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Defective Crankshaft Position Sensor.
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Check the Crankshaft Position Sensor.
Replace if Defective. |
Crank the engine.
If, the Fault Code No. is NOT displayed, then Service is Complete. If however, the Fault Code No. is displayed, then Go To Item 6 below. |
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6
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Malfunction in ECU.
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Replace the ECU
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