Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary. Inspect the fuses and relays related to this system before inspecting the suspected areas below.
When a malfunction is not confirmed by the DTC check, troubleshooting should be carried out in all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic engine check shown in the following flowchart, the location of the problem can be found quickly and efficiently. Therefore, using this check is essential when troubleshooting the engine.
HINT: Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with the intelligent tester when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.
HINT: *: Use the intelligent tester. 1.VEHICLE BROUGHT TO WORKSHOP NEXT 2.CUSTOMER PROBLEM ANALYSIS NEXT 3.CONNECT INTELLIGENT TESTER TO DLC3 HINT: If the display indicates a communication fault in the intelligent tester, inspect the DLC3.
SFI SYSTEM > SYSTEM DIAGRAM
|Typical Enabling Condition|