CIS-E III (Engine Code MC With 2 Knock Sensors)
NOTE:
Before proceeding, verify fuse No. 21 is OK.
For OBD vehicles, only connectors A and B are to be connected to diagnostic connectors 1 and 2.
- Connect LED tester (US 1115 ) using adaptors (VW 1594 ) between rear terminals of diagnostic connector Nos. 1 and 3.
- Connect adaptors (VW 1594 ) to lower terminals of diagnostic connector Nos. 1 and 2. See Fig 1 .
- Start engine and allow to idle. (If engine will not run, crank engine with starter for at least 5 seconds. Do not turn ignition off.
- Connect adaptor A (ground) and adaptor B for at least 4 seconds. See Fig 1 . LED tester will illuminate. If tester does not illuminate, check tester connections and wiring between engine control unit and diagnostic connectors. See WIRING DIAGRAMS article.
- Disconnect adaptor A and B. LED should begin flashing. Fault codes are now be displayed by the flashing test light.NOTE: Pay careful attention to flashing light since there are no discernible break points between 4-digit fault codes.
- Trouble codes will be flashed as 4-digit numbers. There is a 1/2-second pause between flashes. Add flashes together to obtain code for each of the four digits. There is a 2 1/2-second pause before code for next digit is flashed. After code for the fourth (last) digit is flashed, there's another 2 1/2-second pause before fault code is repeated.
- Fault code will be repeated until the ignition is turned off. Record fault code. Check the list of input codes and possible problems. See CIS-E III DOUBLE KNOCK SENSOR ENGINE CODE MC CONTROL INPUT FAULT CODES table.
- Check and repair circuits and/or sensors as indicated. See appropriate test in SYSTEM & COMPONENT TESTING article. After the fault is corrected, check for additional codes.
- To display next fault code, repeat step 2). (Touch remaining end of jumper wire to remaining terminal in connector B for at least 4 seconds.) See Fig 1 . Continue checking for fault codes until Code 0000 is displayed, indicating end of diagnosis. Code 0000 is indicated by light remaining off for approximately 15 seconds after start signal.