Chery Tiggo. Manual — part 428
7.
REPLACE AND PROGRAM THE ECM
• With the X-431 scan tool, view active DTCs in the ECM.
• Refer to ⬙DTC Confirmation Procedure⬙.
Is DTC B3042 or B3043 still present?
Yes
>>
Replace and program ECM.
No
>>
The system is now operating properly.
Reassemble the vehicle and verify the customers complaint is repaired.
DIAGNOSIS & TESTING
15
B3050 - Relay External Line Short Circuit To Ground Or Open Circuit, Relay External
Line Malfunction
B3053 - Relay External Line Short Circuit To Battery
DIAGNOSIS & TESTING
LTSMW150081T
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO.
DTC DEFINITION
DTC DETECTION
CONDITION
DTC SET
CONDITION
POSSIBLE CAUSE
B3050
Relay external line
short circuit to
ground or open
circuit, relay external
line malfunction
Ignition switch: ON
The Immobilizer
control module
detects a short to
ground condition on
the W-Line for at
least 3 seconds.
• Harness or
connectors
• Immobilizer control
module
B3053
Relay external line
short circuit to
battery
Ignition switch: ON
The Immobilizer
control module
detects a short to
battery condition on
the relay external
line.
• Harness or
connectors
• Immobilizer control
module
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.
DIAGNOSIS & TESTING
15
Diagnostic Procedure
1.
CHECK GROUND CONNECTION
• Turn ignition switch off.
• Loosen and retighten ground screws on the body (See Ground Inspection in Section 15 Body & Accessories).
• Inspect ground connection C-204 mounting position (See Vehicle Wiring Harness Layout - Main Harness in
Section 16 Wiring).
Is the ground connection OK?
Yes
>>
Go to the next step.
No
>>
Repair or replace ground connection.
2.
CHECK IMMOBILIZER CONTROL MODULE DTC
• With the scan tool, view DTCs in the Immobilizer control module. Refer to DTC confirmation procedure.
Is DTC B3050 or B3053 present?
Yes
>>
Go to the next step.
No
>>
The condition that caused the DTC to set is currently not present (See Diagnosis & Testing Diagnostic
Help in Section 15 Body & Accessories).
3.
CHECK IMMOBILIZER CONTROL MODULE ELECTRICAL CONNECTOR
• Turn ignition switch off.
• Disconnect the Immobilizer control module electrical
connectors C-025 (1).
• 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.
DIAGNOSIS & TESTING
LTSMD150019
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