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Chery Tiggo. Manual - part 196

CHECK THE ECT SENSOR

• Check resistance between ECT sensor terminal 1 and 2.

ECT°C

RESISTANCE K

⍀

0°C

5.1 - 6.5

20°C

2.1 - 2.7

40°C

0.9 - 1.3

80°C

0.26 - 0.36

• Connect ECT sensor connector.

• Connect ECM connector.

• Turn ignition switch on.

• Check sensor signal output.

TERMINAL NO.

ITEM

CONDITION

DATA (DC

VOLTAGE)

ECT sensor

Ignition switch: ON

ECT: 0°C

3.2 - 3.8 V

ECT: 20°C

2.3 - 2.9 V

ECT: 40°C

1.3 - 1.9 V

ECT: 80°C

0.3 - 0.9 V

Sensor (GND)

Approximately 0 V

Is the check result normal?

Yes

Go to the next step.

Replace ECT sensor.

CHECK DTC

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

• Refer to ⬙DTC Confirmation Procedure⬙.

Is DTC 21 still present?

Yes

Replace the ECM.

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

DIAGNOSIS & TESTING

22 - Crankshaft Position Sensor

DIAGNOSIS & TESTING

LTSMW030012T

Check reference values between ECM terminals and ground under the following conditions:

ECM TERMINAL NO.

ITEM

CONDITION

DATA (DC Voltage)

Crankshaft Position (CKP)

sensor

Ignition switch: ON
Engine: Not cranking

4.8 - 5.2 V

Engine: Cranking

0.4 - 4.0 V

Engine: Idle

1.5 - 2.5 V

On Board Diagnostic Logic
• Self-diagnosis detection logic.

DTC NO.

DTC DEFINITION

DTC DETECTION

CONDITION

DTC SET

CONDITION

POSSIBLE CAUSE

CKP sensor

Crank engine

Signal output is no
variance for 4
seconds
continuously (no
pulse signal).

• CKP sensor

• Harness or
connectors

• Signal plate gear
tooth

• ECM

DTC Confirmation Procedure:

Before performing the following procedure, confirm that battery voltage is more than 12 V.

• Turn ignition switch off.

• Connect the X-431 scan tool to the Data Link Connector (DLC) - use the most current software available.

• Turn ignition switch on.

• With the scan tool, record and erase stored DTCs in the ECM.

• Start engine and warm it to normal operating temperature, then select view DTC and data stream.

• If the DTC is detected, the DTC condition is current. Go to Diagnostic Procedure - Step 1.

• If the DTC is not detected, the DTC condition is intermittent (See Diagnostic Help and Intermittent DTC Trou-

bleshooting in Section 03 Electronic Engine Controls for more information.

NOTE :
Before performing the following procedure, make sure that the ECM connection is in good condition.

NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.

Diagnostic Procedure

CHECK GROUND CONNECTION

• Turn ignition switch off.

• Loosen and retighten ground screws on the body (See Ground Inspection in Section 03 Electronic Engine Con-

trols).

• Inspect the ground connection E-208 (See Vehicle Wiring Harness Layout - Engine Room Harness (With Mit-

subishi 2.4L Engine) in Section 16 Wiring).

Is the ground connections OK?

Yes

Go to the next step.

Repair or replace ground connection.

DIAGNOSIS & TESTING

CHECK CRANKSHAFT POSITION (CKP) SENSOR ELECTRICAL CONNECTOR

• Disconnect the CKP electrical connector (1).

• Inspect the electrical connector for damage.

Is the electrical connector OK?

Yes

Go to the next step.

Repair or replace the electrical connector

as necessary.

CHECK CRANKSHAFT POSITION (CKP) SENSOR POWER SUPPLY CIRCUIT FOR AN OPEN OR SHORT

• Turn ignition switch on.

• Check supply voltage between CKP sensor terminal

3 and ground in the CKP sensor electrical connec-
tor E-055.

• Battery voltage should exist.

Is the check result normal?

Yes

Go to step 5.

Go to the next step.

DETECT MALFUNCTIONING PART

• Check the following:

− Fuse 22, Fuse 12
− Front fuse and relay box H3
− Harness connectors A-102, E-105
− Harness open or short between CKP sensor and fuse

Is the check result normal?

Yes

Go to the next step.

Repair or replace malfunctioning parts.

DIAGNOSIS & TESTING

LTSMD030079

LTSMD030012

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