Chery Tiggo 2009 Service Manual page 1657

On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO.
U040F
U040F
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 and record and erase DTC.
• Start engine and warm it up to the normal operating temperature.
• Select view DTC and data stream.
• If the DTC is detected, the 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 15 Body & Accessories for more information).
NOTE :
Before performing any DTC diagnostic procedures, verify the IC power and ground circuits are properly connected.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
Chery Automobile Co., Ltd.
DIAGNOSIS & TESTING
DTC DETECTION
DTC DEFINITION
Temperature sensor
open circuit or
shorted to supply
Turn ignition switch
Temperature sensor
shorted to ground
DTC SET
CONDITION CONDITION
The Instrument
Cluster (IC) detects
the temperature
sensor (for
instrument cluster)
circuit open or
shorted to supply
condition.
on
The Instrument
Cluster (IC) detects
the temperature
sensor (for
instrument cluster)
circuit shorted to
ground condition.
POSSIBLE CAUSE
• Coolant
temperature sensor
(For Instrument
Cluster)
• Harness or
connectors (The
sensor circuit is open
or short to supply)
• Instrument cluster
• Coolant
temperature sensor
(For instrument
cluster)
• Harness or
connectors (The
sensor circuit is short
to ground)
• Instrument cluster
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