Chery Tiggo. Manual — part 95
Diagnostic Procedure
1.
CHECK GROUND CONNECTIONS
• Turn ignition switch off.
• Loosen and retighten ground screws on the body (See Ground Inspection in Section 03 Electronic Engine Con-
trols).
• Inspect ground connections E-207 and E-208 mounting position (See Vehicle Wiring Harness Layout - Engine
Room Harness (With 1.6L/1.8L Engine) in Section 16 Wiring).
Are the ground connections OK?
Yes
>>
Go to the next step.
No
>>
Repair or replace ground connections.
2.
CHECK ECT SENSOR ELECTRICAL CONNECTOR
• Disconnect the ECT sensor (1) electrical connector.
• Inspect the electrical connector for damage.
Is the electrical connector OK?
Yes
>>
Go to the next step.
No
>>
Repair or replace the electrical connector
as necessary.
3.
CHECK THE ENGINE COOLANT TEMPERATURE (ECT) SENSOR SIGNAL CIRCUIT FOR A SHORT
• Turn ignition switch on.
• Check ECT sensor reference voltage between sen-
sor terminal 2 and ground in the sensor electrical
connector E-019.
• 5 V should exist.
Is the check result normal?
Yes
>>
Go to step 5.
No
>>
Go to the next step.
DIAGNOSIS & TESTING
BESM030019
LTSMD030032
03
4.
DETECT MALFUNCTIONING PART
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness for short to ground between ECT sensor connector terminal 2 and ECM connector terminal 39.
Is the check result normal?
Yes
>>
Replace the ECM.
NOTE : The Immobilizer control module must be matched to the new ECM (See ECM Removal & Instal-
lation in Section 03 Electronic Engine Controls).
No
>>
Repair or replace circuit for a short to ground in harness or connectors.
5.
CHECK THE ECT SENSOR
• Check the resistance between ECT sensor terminal 1 and 2, component side.
ECT°C
RESISTANCE K
⍀
-10°C
8.62 - 10.28
20°C
2.37 - 2.63
80°C
0.299 - 0.345
• Connect the ECT sensor connector.
• Connect the ECM connector.
• Turn ignition switch on.
• Check ECT sensor signal output.
ECT TERMINAL
NO.
ITEM
CONDITION
DATA (DC
VOLTAGE)
39
ECT sensor
Ignition switch on
ECT: 59°C
1.89 V
ECT: 78°C
1.25 V
ECT: 90°C
0.94 V
17
Sensor (GND)
-
Approximately 0 V
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Replace ECT sensor.
DIAGNOSIS & TESTING
6.
CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to ⬙DTC Confirmation Procedure⬙.
Is DTC P0117 still present?
Yes
>>
Replace the ECM.
NOTE : The Immobilizer control module must be matched to the new ECM (See ECM Removal & Instal-
lation in Section 03 Electronic Engine Controls).
No
>>
The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
03
P0118 - Engine Coolant Temperature Circuit High Input
DIAGNOSIS & TESTING
LTSMW030053T
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