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Home >> Buick >> 1986 >> Riviera Base >> Repair and Diagnosis >> Engine Performance >> System >> BCM System, Part II >> ECM Trouble Code Charts - Trouble Shooting >> Code B660, Cruise Control Not In Drive (TORONADO) >> Notes
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Code B660, Cruise Control Not In Drive (TORONADO): Notes

Fig 1: Code B660 Flowchart, Cruise Control Not in Drive (Toronado)
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Fig 2: Code B660, Cruise Control Not in Drive (Toronado)
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Fig 3: Code B660 Schematic, Cruise Control Not in Drive (Toronado)
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Code B660 will set if the cruise control is engaged and the BCM receives a gear selector position signal indication that the vehicle is in Park, Reverse, or Neutral. During the time the failure is present, the BCM will disengage the cruise control system.

  1. BCM data value BD41 displays gear selector position as a percentage value. The insert on Code B660 chart compares gear selector position with BD41 value.
  2. BD41 may display very low values if switch is misadjusted to be between gears.