Electronic control fuel injection system (Common rail type) 1E-17 At code [23] t1=approx. 0.3 sec. ON t2=approx. 0.6 sec. t3=approx. 1.2 sec. Goes off t4=approx. 2.4 sec. Tens digit Units digit At code [413] ON Goes off Tens digit Units digit Hundreds digit About DTC indicated by blinking of diagnosis lamp If there is intermittent (intermittent trouble) While the engine stops, both the current and past DTCs are displayed. While the engine is operated, the lamp illuminates only if the current DTC occurs. The trouble situation not occurring constantly is called intermittent (intermittent trouble). Perform the following steps to solve the intermittent trouble. 1.
Check the DTC information and data display. 2. Evaluate symptom and situation explained by the customer. 3. Check the circuits or the electric system components using check sheet or other methods. How to read DTC by trouble display monitor When a DTC occurs, it is displayed on trouble display monitor on the machine. How to read DTC by a scan tool If the trouble is not detected DTC can be read using a scan tool. In this case, the machine is judged as it operates properly. The condition explained by the customer may be the normal condition. Confirm the customer’s complaint comparing with the condition of the machine to that of another machine. That condition may mean an intermittent trouble.
Confirm the complaint in the situation the customer explains before returning the machine to the customer. 1. Confirm the complaint again. If the complaint can not be fully detected or identified, the machine must be diagnosed again. Confirm the complaint one more time. The complaint may be an intermittent trouble as defined in “If there is intermittent”, but it may also be possible that the machine is normal. 2. Repair and confirm. If the problem is confirmed, repair it. Confirm that the machine operates properly and the symptoms are corrected. This includes test on the machine or other procedures to confirm that the trouble is solved under following conditions:
Confirm by testing in the situation that the customer described. If DTC is diagnosed, reproduce the situation found while the DTC is set, and confirm the repair by checking a scan tool data. Note: Refer to “Trouble diagnosis with scan tool, Operation procedure” for work procedure. If the DTC (diagnostic trouble code) is stored Perform service correctly according to the specified DTC chart. If there is no DTC Select symptom from the diagnostic chart according to symptom. Complete the service following diagnostic procedure. You may also perform inspection by referring function diagnosis. If there is no applicable symptom 1. Confirm the complaint in detail. 2. Create diagnostic plan. 3.
Use wiring diagram and principle of operation. Ask for technical support when repair history is available for similar case. Connect technician’s knowledge with the effective usage of available service information.