X-90 (2WD) L4-1591cc 1.6L SOHC MFI (1997)
INSPECTION PROCEDURE
CIRCUIT DESCRIPTION:
These DTCs identify a solenoid that cannot be energized due to an open in its circuitry, or a solenoid that is always energized due to a short to battery
in its circuitry between the driver and solenoid. An open will not allow proper Antilock Brake System (ABS) operation, but the short to battery simply
turns the solenoid on. A path for base brakes is still allowed once the motor re-homes and the check ball is lifted off its seat during initialization.
FAILURE CONDITION:
DTCs 76 and 78 can be set only when the solenoid is commanded off. If the Electronic Brake Control Module (EBCM) detects an excessive voltage
in the solenoid control circuit, a malfunction exists.
DIAGNOSTIC AIDS:
An "intermittent" malfunction may be caused by a poor connection, rubbed through wire insulation or a wire that is broken inside the insulation.