BPW ECO Tronic EBS Operating And Installation Instructions page 95

DTC Displayed
Demand Pressure Transducer Group
PRESSURE DEMAND
SENSOR SHORT CIRCUIT
PRESSURE DEMAND
SENSOR OPEN CIRCUIT
PRESSURE DEMAND FAULT Service line pressure
PNEUMATIC DEMAND
ERROR
Delivery Pressure Transducer Group
EPRV 21 DELIVERY
SENSOR SHORT CIRCUIT
EPRV 21 DELIVERY
SENSOR OPEN CIRCUIT
EPRV 22 DELIVERY
SENSOR SHORT CIRCUIT
EPRV 22 DELIVERY
SENSOR OPEN CIRCUIT
One Wheel with Slow Recovery Group
EPRV 21 SLOW WHEEL
RECOVERY
EPRV 22 SLOW WHEEL
RECOVERY
Reservoir Pressure Transducer Group
RESERVOIR SENSOR
SHORT CIRCUIT
RESERVOIR SENSOR OPEN
CIRCUIT
EXCESSIVE RESERVOIR
PRESSURE
Description
Service line pressure
transducer short circuit
Service line pressure
transducer open circuit
transducer fault
Service line pressure
transducer fault
Modulator 21 delivery
pressure transducer short
circuit
Modulator 21 delivery
pressure transducer open
circuit
Modulator 22 delivery
pressure transducer short
circuit
Modulator 22 delivery
pressure transducer open
circuit
Slow recovery of one wheel
of Modulator 21
Slow recovery of one wheel
of Modulator 22
Possible causes:
Slow brake release,
foundation brake mechanical
faults, dry bearings, broken
spring, restricted piping
Check for kinks and
blockages etc. Incorrect
piping, Wiring.
Modulator fault. Sensor
wiring crossed across an
axle
Reservoir pressure
transducer short circuit
Reservoir pressure
transducer open circuit
Reservoir pressure above
9.75 bar
8.2 Diagnostic Trouble Codes (DTC)
DTC Displayed
Air Suspension Pressure Transducer Group
SUSPENSION SENSOR
SHORT CIRCUIT
SUSPENSION SENSOR
OPEN CIRCUIT
SUSPENSION PRESSURE
LOW
Pressure Switch Group
REV PRESSURE SWITCH
SHORT CIRCUIT
REV PRESSURE SWITCH
OPEN CIRCUIT
REV SWITCH PNEUMATIC
FAULT
REV PRESSURE SWITCH
SIGNAL FAULT
ISO11992 (CAN) Electrical Signal Group
PNEUMATIC DEMAND
LOSS
TOWED CAN DEMAND
LOSS
TOWED CAN CONTROL
LOSS
Supply Voltage Group
ISO7638 POWER FAILURE
LOW VOLTAGE
HIGH VOLTAGE
UNSPECIFIED POWER
FAULT
ECU Group
ECU EEPROM ERROR
CONFIGURATION ERROR
ECU UNSPECIFIED ERROR
ECU SHUTDOWN
Description
Suspension pressure
transducer short circuit
Suspension pressure
transducer open circuit
Suspension pressure values
outside operating range
Relay emergency valve
pressure switch short circuit
Relay emergency valve
pressure switch open circuit
Relay emergency valve
pressure switch pneumatic
fault
Relay emergency valve
pressure switch failed to
activate
No corresponding
pneumatic demand pressure
CAN line (pin 6 and 7 on
ISO7638) fault
CAN line (pin 6 and 7 on
ISO7638) data fault
Power loss on pin 1 or 2
(ISO7638)
Supply voltage at ECU less
than 19 V when brake apply
solenoid energised
Supply voltage at the ECU
greater than 32 V
Internal ECU fault
Internal ECU fault or ECU
not programmed
Internal ECU fault or ECU
not programmed
Internal ECU fault or ECU
not programmed
Internal ECU fault, the power
supply to the solenoids has
been isolated
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