Code 65 - Pump Motor Relay Or Circuit Open: Notes

This code sets when VCM detects low voltage at Black VCM connector terminal "A" (4.3L VIN Z M/T) or Gray VCM connector terminal "C" (except 4.3L VIN Z M/T) during ABS pump motor relay operation. VCM monitors feedback voltage on circuit 173 and sets Code 65 if voltage is too low.

Fig 1: Code 65 - Schematic (4.3L M/T - VIN Z)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code 65 - Schematic (Except 4.3L M/T - VIN Z)

Courtesy of GENERAL MOTORS CORP.

Fig 3: Code 65 - Pump Motor Relay/Circuit Open - Flow Chart (1 of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 4: Code 65 - Pump Motor Relay/Circuit Open - Flow Chart (2 of 2)

Courtesy of GENERAL MOTORS CORP.