Chery Tiggo 2009 Service Manual page 1711

On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO.
B3050
circuit, relay external
B3053
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, view and erase stored DTCs in the Immobilizer control module.
• Try to start the engine.
• Turn ignition switch off, and wait a few seconds, then turn ignition switch on.
• With the scan tool, view active DTCs in the Immobilizer control module.
• 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 :
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
Relay external line
short circuit to
ground or open Ignition switch: ON
line malfunction
Relay external line
short circuit to Ignition switch: ON
battery
DTC SET
CONDITION CONDITION
The Immobilizer
control module
detects a short to
ground condition on
the W-Line for at
least 3 seconds.
The Immobilizer
control module
detects a short to
battery condition on
the relay external
line.
POSSIBLE CAUSE
• Harness or
connectors
• Immobilizer control
module
• Harness or
connectors
• Immobilizer control
module
15
127
15–