STEP | DESCRIPTION | |
STEP 1 | Get detailed information about the conditions and the
environment when the incident occurred.
The following are key pieces of information required to make a good analysis: |
|
WHAT | Vehicle Model, Engine, Transmission/Transaxle and the System (i.e. Radio). | |
WHEN | Date, Time of Day, Weather Conditions, Frequency. | |
WHERE | Road Conditions, Altitude and Traffic Situation. | |
HOW | System Symptoms, Operating Conditions (Other Components
Interaction).
Service History and if any After Market Accessories have been installed. |
|
STEP 2 | Operate the system, road test if necessary.
Verify the parameter of the incident. If the problem cannot be duplicated, refer to “Incident Simulation Tests”. |
|
STEP 3 | Get the proper diagnosis materials together including:
Identify where to begin diagnosis based upon your knowledge of the system operation and the customer comments. |
|
STEP 4 | Inspect the system for mechanical binding, loose
connectors or wiring damage.
Determine which circuits and components are involved and diagnose using the Power Supply Routing and Harness Layouts. |
|
STEP 5 | Repair or replace the incident circuit or component. | |
STEP 6 | Operate the system in all modes. Verify the system works properly under all conditions. Make sure you have not inadvertently created a new incident during your diagnosis or repair steps. |
P0171 Fuel injection system function
DTC Logic
DTC DETECTION LOGIC
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture
ratio can be brought closely to the
theoretical mixture ratio based on the mixture ratio feedback signal from the
A/F sensors 1. The ECM calculates
the necessary compensation to correct th ...
Basic inspection
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”. ( ...
P2857 Clutch A Pressure
DTC Logic
DTC DETECTION LOGIC
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
Possible causes
P2857
CLUTCH A PRESSURE
(Clutch A Pressure Engagement
Performance)
The auxiliary gearbox gear ratio is 2.232 or
more for the auxili ...