NOTE: For the diagnostic procedure, refer to DTC P1498. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P1498 COIL 4 EGR "A" CONTROL CIRCUIT LOW 1. OUTLINE OF DIAGNOSIS Detects open or short circuit of EGR. Judge as NG when the ECM output level differs from the actual terminal level. 2. COMPONENT DESCRIPTION
3. EXECUTION CONDITION
4. GENERAL DRIVING CYCLE Perform the diagnosis continuously after the enable conditions have been established. 5. DIAGNOSTIC METHOD If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Time Needed for Diagnosis: 2500 ms Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs. |
Inspection
1. CYLINDER HEAD1. Visually inspect to make sure that there are no cracks, scratches or other damage.2. Use liquid penetrant tester on the important sections to check for fissures.3. Check that there are no marks of gas leaking or water leaking on gasket attachment surface.4. Check the warping of th ...