cvvmax's Garage

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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

1
Connection of Crankshaft Position Sensor Coupler.

C
heck 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.


2
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.

3
Wire Harness continuity.
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.

4
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.

5
Defective Crankshaft Position Sensor.
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.

6
Malfunction in ECU.
Replace the ECU

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