False Pump Motor Blocking Diodes JDS Failure
88jaguar02PUMP MOTOR BLOCKING DIODES
JAGUAR DIAGNOSTIC SYSTEM
NO: 23
Model: XJ-S Date: JULY, 1988
KEY POINTS: SOFTWARE ISSUE 4025
If no fault is found during an ABS/power hydraulic system test, JDS will automatically fail the pump motor blocking diode. If a blocking diode fault exists, the pump motor fuse will blow repeatedly. If the fuse does not blow and JDS fails the blocking diode, no blocking diode or ABS/power hydraulic system fault exists.