Fault Code Guide

2. Disconnect the cable connector from the ATC
valve. See Table 1.
3. Connect ohmmeter probes to the ATC valve ter-
minals and read the resistance. See Fig. 4.
4. The resistance of the ATC solenoid coil and its
wiring must be 6.4 to 12 ohms.
• If the resistance is 6.4 to 12 ohms but the
resistance noted in the previous test, "ATC
Valve and Cable Resistance" was not, re-
pair or replace the electrical cable.
• If the resistance is less than 6.4 ohms or
greater than 12 ohms, clean the terminals
on the ATC valve and check the resistance
again.
• If the resistance is still not correct, replace
the valve. See Subject 140 for instruc-
tions.
5. Install the connectors and remove the chocks
from the tires.
1
08/30/99
f430144
2
3
1. ATC Valve
2. Rear Modulator Valve Assembly
3. ATC Solenoid Terminals
Fig. 4, ATC Valve Terminals
Meritor WABCO Pneumatic Antilock Braking System
(ABS)
42.00
Testing
Business Class M2 Workshop Manual, Supplement 0, January 2002170/6