Note On INTERMITTENTS

If an intermittent condition exists, check Code B410 snap data parameters BD61 and BI51. Check for following conditions:

• If BD61 is less than 500 RPM and BI51 is HI, check for an intermittent open in circuit No. 25.
• If BD61 is less than 500 RPM and BI51 is LO, check for an intermittent short to ground in circuit No. 23.
• If BD61 is more than 500 RPM and BI51 is HI, check for an intermittent short to ground in circuit No. 23.
• If BD61 is more than 500 RPM and BI51 is LO, check for an intermittent short to ground in circuit No. 25. Also perform battery and charging system checks to ensure proper operation of these components.

Fig 1: Code B410, Schematic, Charging Sys Ckt Fault

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code B410, Flow Chart, Charging Sys Ckt Fault

Courtesy of GENERAL MOTORS CORP.