Diagnosis and repair work flow
Work flow
Overall sequence
Detailed flow
1.Get information for symptom
Get the detailed information from the customer about the symptom (the condition and the environment when the incident/malfunction occurred) using the “diagnostic work sheet”. (Refer to ec-129, "diagnostic work sheet".) >> Go to 2.
2.Check dtc in ecm
Are any symptoms described and any DTCs 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. Refer to ec-473, "symptom table" and ec-90, "fail safe".
Diagnosis work sheet is useful to verify the incident.
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 displayed DTC, and then check that DTC is detected again.
If two or more DTCs are detected, refer to EC-93, "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 SPORT mode system. Refer to DMS-57, "Component Function Check".
6.Detect malfunctioning part 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 symptoms.
Is the symptom described? Yes >> go to 7.
No >> monitor input data from related sensors or check voltage of related ecm terminals using consult.
Refer to ec-77, "reference value".
7.Detect malfunctioning part by diagnosis procedure
Inspect according to diagnosis procedure of the system.
Is a malfunctioning part detected? Yes >> go to 8.
No >> check intermittent incident. Refer to gi-39, "intermittent incident".
8.Repair or replace the malfunctioning part
>> Go to 9.
9.Final check
When dtc was detected in step 3, perform dtc confirmation procedure or component function check again, and then check that the malfunction have been completely repaired.
When symptom was described from the customer, refer to confirmed symptom in step 4 or 5, 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.
Dtc/circuit diagnosis
Power supply and ground circuit
Audio unit
Audio unit : diagnosis procedure
Regarding wiring diagram information, refer to av-25, "wiring diagram".
1.Check fuse
Check that the following fuses are not blown.
Are the fuses blown?
Yes >> replace the blown fuse after repairing t ...
C1609 Vehicle speed signal
DTC Logic
Dtc detection logic
DTC
Display item
Malfunction detected condition
Possible cause
C1609
CAN VHCL SPEED
Malfunction is detected in vehicle speed signal that
is output from abs actuator and electric unit (control
unit) via can communication. ...
Diagnosis system (BCM)
Common item
COMMON ITEM : CONSULT Function (BCM - COMMON ITEM)
Application item
Consult performs the following functions via can communication with bcm.
System application
BCM can perform the following functions.
Door lock
Door lock : consult function (bcm - door lock)
Data monitor
...