Hummer H1 Service Manual page 478

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Ignition key "OFF" to test system (except where noted)
Fault Code Problem Area
4-13 Left rear wheel
speed sensor
open circuit.
4-14 Left front
wheel speed
sensor open cir-
cuit.
4-15
Right rear
wheel speed
sensor open cir-
cuit.
5-0 Short circuit to
battery between
ECU and right
front inlet
valve solenoid
or wiring.
5-1 Short circuit to
battery between
ECU and right
front outlet
valve solenoid
or wiring.
5-2 Short circuit to
battery between
ECU and left
front inlet
valve solenoid
or wiring.
5-3 Short circuit to
battery between
ECU and left
front outlet
valve solenoid
or wiring.
5-4 Short circuit to
battery between
ECU and right
rear inlet valve
solenoid or wir-
ing.
05745159
Fault Code List
Test Pin
Values
Locations
500-2000 W
18 and 35
500-2000 W
15 and 32
500-2000 W
16 and 33
6 and 27 0 volts
5.0-7.5 W
7 and 27 0 volts
3.0-5.0 W
23 and 27 0 volts
5.0-7.5 W
24 and 27 0 volts
3.0-5.0 W
4 and 27 0 volts
5.0-7.5 W
Brake System
Check/Repair
Check electrical resistance of affected sensor and
wiring at ECU connector and at harness plugs.
Repair wiring or replace sensor as necessary.
Check electrical resistance of affected sensor and
wiring at ECU connector and at harness plugs.
Repair wiring or replace sensor as necessary.
Check electrical resistance of affected sensor and
wiring at ECU connector and at harness plugs.
Repair wiring or replace sensor as necessary.
Check voltages at wiring harness including con-
nectors. Check electrical resistance of affected
valve wiring to ground at ECU connector and at
modulator assembly plug. Repair wiring or
replace as necessary.
Check voltages at wiring harness including con-
nectors. Check electrical resistance of affected
valve wiring to ground at ECU connector and at
modulator assembly plug. Repair wiring or
replace as necessary.
Check voltages at wiring harness including con-
nectors. Check electrical resistance of affected
valve wiring to ground at ECU connector and at
modulator assembly plug. Repair wiring or
replace as necessary.
Check voltages at wiring harness including con-
nectors. Check electrical resistance of affected
valve wiring to ground at ECU connector and at
modulator assembly plug. Repair wiring or
replace as necessary.
Check voltages at wiring harness including con-
nectors. Check electrical resistance of affected
valve wiring to ground at ECU connector and at
modulator assembly plug. Repair wiring or
replace as necessary.
7-39