Bendix Commercial Vehicle Systems EC-60 ATC STD/PREM CONTROLLERS - Manual (Page 21)

21
Pressure Modulator Valve Repair Tests:
1. Take all measurements at ECU harness connector pins in
order to check wire harness and PMV. Probe the connector
carefully so that the terminals are not damaged.
2. Pressure modulator resistance should read:
Location Measurement
Release to Common 4.9 to 5.5 Ohms
Hold to Common 4.9 to 5.5 Ohms
Release to Hold 9.8 to 11.0 Ohms
Release, Hold, Common Open Circuit (no continuity)
to Voltage or Ground
Caution: When troubleshooting modulator trouble codes,
check inactive trouble codes and event history for over-voltage
or excessive noise trouble codes. If one of these is found,
troubleshoot these trouble codes first before the PMV.
Cab-mount ECU: Looking into
wire harness connector
Frame-mount ECU: Looking into
wire harness connector
Connector Pin PMV Location
X2
18 Way
1 Left Steer Axle Hold
2 Left Steer Axle Release
3 Left Steer Axle Common
4 Right Steer Axle Hold
6 Right Steer Axle Common
7 Right Steer Axle Release
9 Right Drive Axle Common
10 Right Drive Axle Hold
13 Right Drive Axle Release
12 Left Drive Axle Common
16 Left Drive Axle Hold
17 Left Drive Axle Release
X3
15 Way (if
Premium ECU
is configured for
6 sensors)
4 Left Additional Axle Hold
6 Left Additional Axle Common
7 Left Additional Axle Release
9 Right Additional Axle Common
10 Right Additional Axle Hold
13 Right Additional Axle Release
Connector Pin PMV Location
X2
18 Way
7 Left Steer Axle Hold
8 Left Steer Axle Release
13 Left Steer Axle Common
9 Right Steer Axle Hold
10 Right Steer Axle Release
14 Right Steer Axle Common
11 Left Drive Axle Hold
12 Left Drive Axle Release
15 Left Drive Axle Common
16 Right Drive Axle Common
17 Right Drive Axle Hold
18 Right Drive Axle Release
X3
15 Way (if
Premium ECU
is configured for
6 sensors)
9 Left Additional Axle Hold
10 Left Additional Axle Release
15 Left Additional Axle Common
16 Right Additional Axle Common
17 Right Additional Axle Hold
18 Right Additional Axle Release