Cylinder Balance Test
1) This test helps identify a weak or non-contributing cylinder in engines with SFI fuel systems. PCM shuts off fuel supply to each injector and measures RPM drop. It computes variation between cylinders and identifies weak ones. Total test time is about 3 minutes.
2) This test mode is entered from KOER SELF-TEST after all codes have been displayed. Within 2 minutes after codes have been displayed, apply and release throttle). After a brief stabilizing period, PCM will activate test procedure.
3) If Code 90 is displayed during this test, system has passed test. If Code 538 is displayed, repeat cylinder balance test. If throttle is moved during this test, Code 538 will appear, indicating test is not completed. If a weak cylinder is indicated, repeat test. See CYLINDER BALANCE TEST SERVICE CODES table.
| Service Code | Application |
|---|---|
| 90 | Pass |
| 10 | Cylinder No. 1 |
| 20 | Cylinder No. 2 |
| 30 | Cylinder No. 3 |
| 40 | Cylinder No. 4 |
| 50 | Cylinder No. 5 |
| 60 | Cylinder No. 6 |
| 538 | Retest |