Chery Tiggo 2009 Service Manual page 1652

On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO.
DEFINITION
Battery over
U029C
voltage error
Battery under
U029C
voltage error
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, select view, 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 :
• Inspect the vehicle for aftermarket accessories that may exceed the Generator System output.
• Inspect the fuses. If an open fuse is found, use the wiring schematics as a guide and inspect the wiring and
connectors for damage.
• Troubleshoot any Engine Control Module (ECM) charging/cranking DTCs before proceeding.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
68
15–
DIAGNOSIS & TESTING
DTC
DTC
DETECTION
CONDITION
Turn ignition
switch on
DTC SET CONDITION
Instrument Cluster (IC) detected that
the battery voltage is excessively
high.
Instrument Cluster (IC) detected that
the battery voltage is excessively
low.
Chery Automobile Co., Ltd.
POSSIBLE
CAUSE
• Charge system
• Instrument
Cluster (IC)
• Battery
• Charge system
• Harness or
connector
• Instrument
Cluster (IC)