Description

Engine does not start when main relay (Engine control relay) is operated normally and immobilizer system is normal.

Inspect CKPS (Crankshaft Position Sensor) and CMPS (Camshaft Position Sensor) signal input.

Diagnostic Procedure
CKPS and CMPS signal input inspection (Simple inspection)
1.

Check tachometer on the cluster when engine is cranked.

2.

Check needle`s movement on the tachometer. (Needle Indicates approx 300 rpm)

Symptom

Inspection procedure

Case1

● There is no movement of needle on the cluster when engine is cranked.

● Go to "Case3 inspection" as below

Case2

● There is movement of needle on the cluster when engine is cranked. But engine starting is impossible.

● Go to "Case1,2 inspection" as below

CKPS and CMPS current data inspection
3.

Connect GDS(scantool) to Data Link Connector (DLC).

4.

IG KEY "ON" and ENGINE "OFF"

5.

Select 'Engine Speed', 'Fuel Pressure', 'Battery Positive Voltage'.

6.

Monitor parameters on the scantool selected data while engine cranking.

Symptom

Inspection procedure

Case1

● CKPS and CMPS signals are normal.

● 'Fuel pressure measured' and 'Engine speed sensor' parameters rise simultaneously while engine cranking but 'Fuel pressure measured' does not rise over 12 Mpa, (Fig1)

☞ Go to 'Fuel system inspection'

Case2

● CMPS signal is abnormal.

● 'Fuel pressure measured' and 'Engine speed sensor' parameters rise simultaneously while engine cranking but Engine starting is impossible. (Fig 2)

● DTC 'P0341 Camshaft Position Sensor circuit range/performance' would be displayed.

caution

In case of abnormal fuel system, 'Fuel pressure measured' can not rise.

☞ Go to "CMPS component inspection"

Case3

● CKPS signal is abnormal.

● 'Engine speed sensor' rise after approx. 2~3 seconds after engine cranking.

● 'Fuel pressure measured' does not rise and Engine starting is impossible.

● DTC 'P0335 Crankshaft Position Sensor circuit' would be displayed. (Fig 3)

☞ Go to "CKPS component inspection"

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