WABCO ESC - Page 82

7 SPN, SID, FMI Fault Codes
80
WABCO Maintenance Manual MM-0112 (Revised 07-18)
Figure 7.14
Figure 7.14
SPN SID FMI
Blink
Code
Description
Warning
Light
System
Reaction
Cause Action
Left Rear Modulator Valve
797 9 3 2 + 4
Shorted to
UBATT
ABS WL
ABS Wheel
Disabled
ESC/RSC/ATC/
HSA Disabled
Continuity between Inlet (IV) or Outlet (OV) and battery voltage or another modulator wire (short circuit) is detected.
• Verify valve resistance of 4.0-9.0 ohm between IV to ground and OV to ground for 12v
system (11.0-21.0 ohms for 24v system).
• Verify resistance through harness and valve together is the same as valve by itself. • Verify no voltage between Inlet/Outlet circuit and ground at the valve. • Verify no voltage through the harness with ECU unplugged and Key ON. • Check for corroded or damaged wiring between the ECU and the modulator valve.
797 9 5 2 + 4 Open Circuit ABS WL
ABS Wheel
Disabled
ESC/RSC/ATC/
HSA Disabled
ECU has detected that Inlet (IV), Outlet (OV) or both are not connected.
• Verify valve resistance of 4.0-9.0 ohm between IV to ground and OV to ground for 12v
system (11.0-21.0 ohms for 24v system).
• Verify resistance through harness and valve together is the same as valve by itself. • Check if connectors are fully seated and verify no open connections. • Check for corroded or damaged wiring between the ECU and the modulator valve.
797 9 6 2 + 4
Shorted to
Ground
ABS WL
ABS Wheel
Disabled
ESC/RSC/ATC/
HSA Disabled
Continuity between Inlet (IV) or Outlet (OV) and ground (short circuit) is detected.
• Verify valve resistance of 4.0-9.0 ohm between IV to ground and OV to ground for 12v
system (11.0-21.0 ohms for 24v system).
• Verify resistance through harness and valve together is the same as valve by itself. • Check for corroded or damaged wiring between the ECU and the modulator valve.
Right Rear Modulator Valve
798 10 3 2 + 3
Shorted to
UBATT
ABS WL
ABS Wheel
Disabled
ESC/RSC/ATC/
HSA Disabled
Continuity between Inlet (IV) or Outlet (OV) and battery voltage or another modulator wire (short circuit) is detected.
• Verify valve resistance of 4.0-9.0 ohm between IV to ground and OV to ground for 12v
system (11.0-21.0 ohms for 24v system).
• Verify resistance through harness and valve together is the same as valve by itself. • Verify no voltage between Inlet/Outlet circuit and ground at the valve. • Verify no voltage through the harness with ECU unplugged and Key ON. • Check for corroded or damaged wiring between the ECU and the modulator valve.
798 10 5 2 + 3 Open Circuit ABS WL
ABS Wheel
Disabled
ESC/RSC/ATC/
HSA Disabled
ECU has detected that Inlet (IV), Outlet (OV) or both are not connected.
• Verify valve resistance of 4.0-9.0 ohm between IV to ground and OV to ground for 12v
system (11.0-21.0 ohms for 24v system).
• Verify resistance through harness and valve together is the same as valve by itself. • Check if connectors are fully seated and verify no open connections. • Check for corroded or damaged wiring between the ECU and the modulator valve.
798 10 6 2 + 3
Shorted to
Ground
ABS WL
ABS Wheel
Disabled
ESC/RSC/ATC/
HSA Disabled
Continuity between Inlet (IV) or Outlet (OV) and ground (short circuit) is detected.
• Verify valve resistance of 4.0-9.0 ohm between IV to ground and OV to ground for 12v
system (11.0-21.0 ohms for 24v system).
• Verify resistance through harness and valve together is the same as valve by itself. • Check for corroded or damaged wiring between the ECU and the modulator valve.
4010657a