Chery Tiggo. Manual — part 94
6.
CHECK THE IAT SENSOR GROUND CIRCUIT FOR OPEN OR SHORT
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check for harness continuity between following terminals.
• For 1.6L engine, check continuity between IAT sensor terminal 1 and ECM terminal 17.
IAT SENSOR
CONNECTOR TERMINAL
ECM CONNECTOR
TERMINAL
1
17
• For 1.8L engine, check continuity between IAT sensor terminal 3 and ECM terminal 17.
IAT SENSOR
CONNECTOR TERMINAL
ECM CONNECTOR
TERMINAL
3
17
• Continuity should exist.
• Check harness for short to power.
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Repair circuit for an open or short to power in harness or connectors.
DIAGNOSIS & TESTING
03
7.
CHECK THE IAT SENSOR
• Connect IAT sensor connector.
• Connect ECM connector.
• Turn ignition switch on.
• Check signal between the IAT sensor terminal 1 and ground under the following conditions:
TERMINAL NO.
ITEM
CONDITION
DATA (DC
VOLTAGE)
42
IAT sensor
Ignition switch: ON
IAT: 78°C
Approximately
1.88 V
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Replace the IAT sensor.
8.
CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to ⬙DTC Confirmation Procedure⬙.
Is DTC P0113 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
P0117 - Engine Coolant Temperature Circuit Low Input
DIAGNOSIS & TESTING
LTSMW030053T
03
Check reference values between ECM terminals and ground under the following conditions:
ECM TERMINAL
NO.
ITEM
CONDITION
DATA (DC
VOLTAGE)
17
Sensor (GND)
Ignition switch: ON
-
Approximately 0 V
39
Engine Coolant
Temperature (ECT)
sensor
ECT: 59°C
1.89 V
ECT: 78°C
1.25 V
ECT: 90°C
0.94 V
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO.
DTC DEFINITION
DTC DETECTION
CONDITION
DTC SET
CONDITION
POSSIBLE CAUSE
P0117
Engine Coolant
Temperature (ECT)
circuit low input
Ignition switch on or
after engine start
Signal output is
below minimum
acceptable range for
a few seconds
continuously.
• ECT sensor
• Harness or
connectors
• 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 this DTC diagnostic procedure, verify that the engine coolant temperature is normal.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
DIAGNOSIS & TESTING
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