Chery Tiggo. Manual — part 138

4.

DETECT MALFUNCTIONING PART

• Check the following:

− Harness connectors A-102, E-105
− Front fuse and relay box F3
− Fuse 22, Fuse 12
− Check harness for open or short between CMP sensor and fuse.

• With the X-431 scan tool, read ECM DTCs.

Is DTC P0016 still present?

Yes

>>

Go to the next step.

No

>>

The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.

5.

CHECK CMP SENSOR GROUND CIRCUIT FOR AN OPEN AND SHORT

• Turn ignition switch off.

• Check harness continuity between CMP sensor terminal 1 and ground.

• Continuity should exist.

Is the check result normal?

Yes

>>

Go to the next step.

No

>>

Repair or replace circuit for an open or short to power in harness or connectors.

6.

CHECK CMP SENSOR INPUT SIGNAL CIRCUIT FOR AN OPEN AND SHORT

• Turn ignition switch on.

• Check voltage between CMP sensor terminal 2 and ground.

• 11 V should exist.

Is the check result normal?

Yes

>>

Go to the next step.

No

>>

Repair or replace circuit for an open or short to power or short to ground in harness or connectors.
If circuit is normal, go to the next step.

DIAGNOSIS & TESTING

03

7.

CHECK CMP SENSOR SIGNAL

• Turn ignition switch off.

• Connect CMP sensor connector.

• Check signal voltage between CMP sensor terminal 2 and ground when engine is running.

• Approximately 6 V square wave signal should exist.

ENGINE ANALYZER (KES-200)

CMP SENSOR SIGNAL

Is the CMP output signal normal?

Yes

>>

Go to step 10.

No

>>

Go to the next step.

8.

CHECK CMP SENSOR

• Remove the CMP sensor (1).

• Inspect and clean the CMP sensor and mounting

area for any condition that would result in an incor-
rect signal, such as damage, foreign material, or
excessive movement.

Is the mounting area OK?

Yes

>>

Go to the next step.

No

>>

Repair or replace the sensor as

necessary.

DIAGNOSIS & TESTING

VISMD030001

9.

CHECK CMP SENSOR RESISTANCE

• Check the resistance of the CMP sensor, component side.

TERMINAL NO.

RESISTANCE

⍀ (25°C)

1 & 2

Except 0 or

⬁

1 & 3

2 & 3

Is the check result normal?

Yes

>>

Replace the CMP sensor with a known good CMP sensor.
Monitor the CMP sensor signal on the KES-200 screen.
− If the CMP sensor signals were normal, the system is OK.
− If the CMP sensor signals were still irregular or missing, go to step 14.

No

>>

Eliminate any condition that would result in an incorrect signal.

DIAGNOSIS & TESTING

03

10.

CHECK CKP SENSOR SIGNAL

• Check signal between CKP sensor (1) terminal 1 or

2 and ground when engine is running.

ENGINE ANALYZER (KES-200)

CKP SENSOR SIGNAL

Is the CKP output signal normal?

Yes

>>

Go to step 12.

No

>>

Go to the next step.

DIAGNOSIS & TESTING

VISMD030200