Chery Tiggo 5 (T21). Manual - part 420
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Intermittent DTC Troubleshooting
If malfunction is intermittent, perform the followings:
Check if connectors are loose.
Check if wire harnesses are worn, pierced, pinched or partially broken.
Wiggle related wire harnesses and connectors and observe if signal is interrupted in the related circuit.
If possible, try to duplicate the conditions under which the DTC was set.
Look for the data that has changed or the DTC to be reset during the wiggle test.
Look for broken, bent, protruded or corroded terminals.
Inspect the mounting areas of power door lock assembly, wire harness or wire harness connector and so
on for damage, foreign matter, etc. that will cause incorrect signals.
Check and clean all wire harness connectors and grounding parts related to the current DTC.
Remove the Body Control Module (BCM) from the malfunctioning vehicle and install it to a new vehicle and
perform a test. If DTC cannot be cleared, the Body Control Module (BCM) is malfunctioning. If DTC can be
cleared, reinstall the Body Control Module (BCM) to original vehicle.
If multiple trouble codes were set, refer to the circuit diagrams to look for any common ground circuit or
power supply circuit applied to the DTC.
Refer to Technical Bulletin that is applied to the malfunction.
Ground Inspection
Groundings are very important to entire circuit system, which are normal or not can seriously affect the entire
circuit system. Ground points are often exposed to moisture, dirt and other corrosive environments. Corrosion
(rust) and oxidation may increase load resistance. This situation will seriously affect the normal operation of
the circuit. The operations to check the ground points are as follows:
1. Remove the ground bolt or nut.
2. Check all contact surfaces for tarnish, dirt and rust, etc.
3. Clean as necessary to ensure that contacting is in a good condition.
4. Reinstall the ground bolt or nut securely.
5. Check if add-on accessories interfere with the ground circuit.
6. If several wire harnesses are crimped into one ground terminal, check if they are installed correctly. Make
sure all wire harnesses are clean, securely fastened and providing a good ground path.
Diagnosis Procedure
HINT:
Use the following procedure to troubleshoot the power door lock control system.
Standard voltage: 11 to 14 V
If voltage is below 11 V, recharge or replace the battery before proceeding to next step.
1
Vehicle brought to workshop
2
Check battery voltage
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