HALDEX-L31204
HALDEX M939 INFOCENTER
HAND-HELD DIAGNOSTIC TOOL; INSTRUCTION MANUAL
NOVEMBER 2003
HALDEX-L31204 - Page 8 of 10
ONE WHEEL WITH SLOW RECOVERY GROUP
XSEN
40
Sensor wiring crossed across an axle.
SLW
42
Slow recovery, blue channel.
SLW
43
Slow recovery, yellow channel.
MODULATOR SOLENOID WIRING OR SOLENOID OPEN CIRCUIT GROUP
BUHd 62
Hold solenoid, blue channel.
YEHd 63
Hold solenoid, yellow channel.
BUDU 68
Dump solenoid, blue channel.
YEDU 69
Dump solenoid, yellow channel.
MODULATOR SOLENOID WIRING OR SOLENOID SHORT TO B- GROUP
BUHd 72
Hold solenoid, blue channel.
YEHd 73
Hold solenoid, yellow channel.
BUDU 78
Dump solenoid, blue channel.
YEDU 79
Dump solenoid, yellow channel.
Possible causes:
Slow brake release,foundation brake
mechanical faults, dry bearings, broken
spring, restricted piping. Modulator fault.
Check for kinks and blockages ect.
etc. Incorrect piping, wiring.
6
Possible causes:
Modulator Valve
solenoid failure, solenoid connection,
or valve cable damage.
Possible causes:
Modulator Valve
solenoid failure or valve cable damage
Inspect exciter ring for damage
MODULATOR SOLENOID WIRING OR SOLENOID SHORT TO B+ GROUP
SOL
80
Poor insulation in the modulator solenoid or wiring fault.
BUHd 82
Hold solenoid, blue channel.
YEHd 83
Hold solenoid, yellow channel.
BUDU 88
Dump solenoid, blue channel.
solenoid failure or valve cable damage.
Possible causes:
Modulator Valve
Failed Primary Reservoir.
Verify Valve Solenoid resistance
is 16 Ohms.
Verify Valve Solenoid resistance
is 16 Ohms.
Verify Valve Solenoid Resistance is 16 Ohms.
Verify Cable Continuity between
Valve to ECU connections.
Verify Cable Continuity between
Valve and ECU connections.
Verify Cable Continuity between
Valve and ECU connections.
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