Page 26 - Workshop Manual - Aumark (BJ1051)

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Introduction-How to Troubleshoot the Vehicle
Identifying symptoms and checking diagnostic trouble code/blink code (DTC/BC)
Tips:
• The Foton AUMARK diagnostic system has many functions.
• The first function is to check DTC/BC. Trouble signals in control module circuit will
be stored in memory of the module in the form of codes for easy call.
• The other function is to check input signals. Check if signals from switches have
been sent to the control module accurately.
• Uses of these functions help narrow troubleshooting scope rapidly and increase
trouble diagnosis and troubleshooting efficiencies.
Checking input signals Diagnostic test mode
System DTC/BC
(sensor check) (quick test)
ABS
A/C system - - -
Lighting system - - -
Wipers and washers - - -
Audio system - - -
Power windows - - -
Combination meter - - -
01 Power door locks - - -

• During DTC/BC, it is extremely important to judge if the malfunction represented by this
code is taking place or has occurred and now has restored to normal. In addition, verification
must be performed in symptom check whether the malfunction represented by a DTC / BC
is directly related to a symptom. Therefore, you must perform DTC/BC check both before
and after symptom identification in order to judge current state of your vehicle. Otherwise,
inessential trouble diagnosis and troubleshooting to normal systems will take place to
increase troubleshooting difficulty or cause some unrelated maintenance operations. So you
must follow operation procedures to check DTC/BC.
• The flow by which you can perform trouble diagnosis and troubleshooting using DTC/BC
check is shown in the figure below. This flow shows how to inspect efficiently using
DTC/BC. Finally, this flow shows how to perform trouble diagnosis and troubleshooting
by using DTC/BC and symptoms chart.
1. DTC/BC check
2. Making records and clearing the DTC/BC displayed
3. Symptom identification

Whether the symptom persist?
Yes > Go to step 4.
No > Go to step 5.

4. Checking by means of symptom simulation

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