Diagnosis and repair work flow
Work flow
OVERALL SEQUENCE
Detailed flow
1.Get information for symptom
>> GO TO 2.
2.Check dtc
Are any symptoms described and any dtc detected? Symptom is described, dtc is detected>>go to 3.
Symptom is described, dtc is not detected>>go to 4.
Symptom is not described, dtc is detected>>go to 5.
3.Confirm the symptom
Try to confirm the symptom described by the customer.
Also study the normal operation and fail-safe related to the symptom.
Verify relation between the symptom and the condition when the symptom is detected.
>> Go to 5.
4.Confirm the symptom
Try to confirm the symptom described by the customer.
Verify relation between the symptom and the condition when the symptom is detected.
>> Go to 6.
5.Perform dtc confirmation procedure
Perform dtc confirmation procedure for the detected dtc, and then check that dtc is detected again. At this time, always connect consult to the vehicle, and check self diagnostic results in real time.
If two or more dtcs are detected, refer to bcs-48, "dtc inspection priority chart" and determine trouble diagnosis order.
Note:
If the result of Component Function Check is NG, it is the same as the detection of DTC by DTC CONFIRMATION PROCEDURE.
Is dtc detected? Yes >> go to 7.
No >> check according to gi-39, "intermittent incident".
6.Detect malfunctioning system by symptom diagnosis
Detect malfunctioning system according to symptom diagnosis based on the confirmed symptom in step 4, and determine the trouble diagnosis order based on possible causes and symptom.
Is the symptom described? Yes >> go to 7.
No >> monitor input data from related sensors or check voltage of related module terminals using consult
7.Detect malfunctioning part by diagnosis procedure
Inspect according to Diagnosis Procedure of the system.
Is malfunctioning part detected? YES >> GO TO 8.
NO >> Check according to GI-39, "Intermittent Incident".
8.Repair or replace the malfunctioning part
>> GO TO 9.
9.Final check
When DTC is detected in step 2, perform DTC CONFIRMATION PROCEDURE again, and then check that the malfunction is repaired securely.
When symptom is described by the customer, refer to confirmed symptom in step 3 or 4, and check that the symptom is not detected.
Is DTC detected and does symptom remain? YES-1 >> DTC is detected: GO TO 7.
YES-2 >> Symptom remains: GO TO 4.
NO >> Before returning the vehicle to the customer, always erase DTC.
System description
Refrigeration system
Component part location
High-pressure service port
High-pressure pipe
Expansion valve
Low-pressure service port
Low-pressure flexible hose
Compressor
Refrigerant pressure sensor
Condenser and liquid tank assembly
High-pressure flexible hose
Refrigera ...
Wiring diagram
Brake control system
Wiring Diagram
...
Ecm branch line circuit
Diagnosis procedure
1.Check connector
Turn the ignition switch off.
Disconnect the battery cable from the negative terminal.
Check the terminals and connectors of the ecm for damage, bend and loose
connection (unit side and
connector side).
Is the inspection result normal?
Yes > ...