The defect
STRAY VOLTAGE INDUCED ON THE POWER TAKEOFF (PTO) SIGNAL CIRCUIT 510 MAY OCCUR WHEN THE ELECTRONIC CONTROL MODULE (ECM) CONNECTOR GETS WET, CAUSING UNINTENDED ENGINE ACCELERATION.
The risk
UNINTENDED ENGINE ACCELERATION WHILE THE BUS IS IN GEARMAY RESULT IN A LOSS OF VEHICLE CONTROL AND AN ACCIDENT.
The remedy
INSTALL A GROUND INTERLOCK TO GROUND CIRCUIT 510 IN THE DDEC SYSTEM ANYTIME THE PTO IS DISABLED FOR ANY REASON. THE GROUND ELIMINATES THE STRAY VOLTAGE EFFECT BETWEEN THE ECM CONNECTOR AND CIRCUIT 510.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Neoplan Inter-City Bus | 1986, 1987, 1988, 1989, 1990, 1991, 1992 |
| Neoplan Transit Bus | 1986, 1987, 1988, 1989, 1990, 1991, 1992 |
Components: ELECTRICAL SYSTEM:IGNITION:MODULE
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Neoplan Inter-City Bus | 1986 | 0 | 1 |
| Neoplan Inter-City Bus | 1987 | 0 | 1 |
| Neoplan Inter-City Bus | 1988 | 0 | 1 |
| Neoplan Inter-City Bus | 1989 | 0 | 1 |
| Neoplan Inter-City Bus | 1990 | 0 | 1 |
| Neoplan Inter-City Bus | 1991 | 0 | 1 |
| Neoplan Inter-City Bus | 1992 | 0 | 1 |
| Neoplan Transit Bus | 1986 | 0 | 2 |
| Neoplan Transit Bus | 1987 | 0 | 2 |
| Neoplan Transit Bus | 1988 | 0 | 2 |
| Neoplan Transit Bus | 1989 | 0 | 2 |
| Neoplan Transit Bus | 1990 | 0 | 1 |
| Neoplan Transit Bus | 1991 | 0 | 1 |
| Neoplan Transit Bus | 1992 | 0 | 1 |
Other electrical system recalls in 1992
13 of the 185 recall campaigns reported to NHTSA in 1992 concerned the electrical system; NEOPLAN USA CORP. filed 29 campaigns in all.
| 92V182000 15 Dec 1992 | GENERAL MOTORS CORP. |
| 92V180000 14 Dec 1992 | HARLEY-DAVIDSON MOTOR CO. |
| 92V179000 9 Dec 1992 | MONACO COACH CORP. |
| 92V174000 2 Dec 1992 | BAYERISCHE MOTOREN WERKE |
| 92V125000 4 Sept 1992 | HARLEY-DAVIDSON MOTOR CO. |
| 92V115000 12 Aug 1992 | BLUE BIRD BODY COMPANY |
| 92V066000 11 May 1992 | GENERAL MOTORS CORP. |
| 92V033000 10 Mar 1992 | OSHKOSH TRUCK CORPORATION |
NHTSA recalls (public domain) · all recalls of 1992