Code 33: Engine Speed Input
1 Perform TCU DIAGNOSTIC CIRCUIT CHECK . Ensure ignition is turned to LOCK position. Disconnect noise suppressor filter connector. See Fig 1 . Connect jumper wire between filter harness connector terminal No. 2 (MD6Brown wire) and No. 3 (MD6Brown/White wire).
2) Retrieve trouble codes. If code 33 is not displayed, replace noise suppressor. If code 33 is displayed, turn ignition to LOCK position. Remove jumper wire. Disconnect ignition coil connector.
3) Using ohmmeter, check continuity between ignition coil harness connector terminal No. 2 (MD6Brown/White wire) and noise suppressor harness connector terminal No. 3 (MD6Brown/White wire). If continuity does not exist, inspect and repair circuit as needed.
4) If continuity does exist, disconnect TCU 10-pin harness connector. Check continuity between noise suppressor harness connector terminal No. 2 (MD6Brown wire) and TCU harness connector terminal No. 4. See Figure .
5) If continuity does not exist, inspect and repair circuit as needed. If continuity does exist, replace TCU and retest.