Description
caution

First of all check damage of terminals : Check terminals for contact resistance, corrosion and deformation.

CKPS calculates RPM and crank angle. CKPS is important to determine fuel injection quantity and injection timing. Check CKPS signal because Impossible starting, Engine stalls and Engine hesitation would be caused by abnormal CKPS signal.

Diagnostic Procedure
CKPS circuit inspection
1.

IG KEY "OFF", ENGINE "OFF".

2.

Disconnect CKPS connector.

3.

IG KEY "ON"

4.

Measure the voltage of CKPS connector terminals.

A.

Case 1 : In case of abnormal voltage at terminal "1", "2", "3".

"DTC" related with CKPS would be displayed.

Refer to "DTC" troubleshooting procedures.

B.

Case 2 : In case of normal voltage at terminal "1", "2", "3".

Go to "CKPS inspection" procedure.

CKPS inspection
5.

IG KEY "ON", ENGINE "OFF".

6.

Connect CMPS, CKPS connectors.

7.

Connect scantool to Data Link Connector (DLC).

8.

Select oscilloscope function on the scantool

9.

Connect channel A to CKPS connector terminal "2".

10.

Connect channel B(+) to CKPS connector terminal "2" and channel B(-) to CKPS connector terminal "3".

11.

Monitor waveforms after ENGINE "ON" or ENGINE cranking.

A.

Case 1 : In case that CKPS signal is not displayed.

Replace the CKPS after measuring resistance of the CKPS component.

If CKPS signal is not displayed (CKPS component resistance and insulating condition are normal),

- Check air gab between tone wheel and the CKPS.

B.

Case 2 : In case that CKPS signal is abnormal.(Regular abnormal signal similar reference point signal is displayed.)

Inspect the tone wheel (it is crushed or not) after removing oil fan.

Inspect air gab between tone wheel and the CKPS.

C.

Case 3 : In case that CKPS signal is displayed but reference point between CKPS signal and CMPS signal is abnormal.

Go to "Timing belt alignment inspection" procedure.

Яндекс.Метрика