Hummer H1 (2002+). Manual — part 121
____________________________________________________________
Brake System 7-43
®
05745159
Figure 7-47: ABS/TT4 Main System Diagram.
609 YL
RIGHT
REAR
994 BR
995 BK
C2-23
C2-22
16
33
WHEEL
SPEED
SENSOR
LEFT
REAR
992 BR
993 BK
C2-32
C2-31
18
35
WHEEL
SPEED
SENSOR
RIGHT
FRONT
998 BR
999 BK
C2-19
C2-20
17
34
WHEEL
SPEED
SENSOR
970 TN
971 PP
972 YL
973 OR
974 DB
975 LB
976 RD
977 WH
978 BK
677 GY
1
2
10
11
13
12
5
4
6
9
OUTLET V
A
L
V
E
LF
INLET V
A
L
V
E
OUTLET V
A
L
V
E
RF
INLET V
A
L
V
E
OUTLET V
A
L
V
E
LR
INLET V
A
L
V
E
OUTLET V
A
L
V
E
RR
INLET V
A
L
V
E
REF GROUND
SHUTTLE
VA
LV
E
SWITCH
G1
58 BK
PUMP
RELA
Y
1
G2
PUMP MOTOR
PUMP
RELA
Y
2
605 PP
610 RD
58 BK
MAXI FUSE
40A 7M
EXTERIOR
FUSE BOX
TO
BATTERY
LEFT
FRONT
996 BR
997 BK
C2-11
C2-10
15
32
WHEEL
SPEED
SENSOR
B
A
M
WSS LOW
WSS HIGH
WSS LOW
WSS HIGH
WSS LOW
WSS HIGH
24
23
7
6
22
21
5
4
31
MOTOR
MONITOR
11
30
12
WSS LOW
WSS HIGH
25
9-S07-001
C7
C7
C11
MODULATOR
ECU
7-44
Brake System
_____________________________________________________________
®
Figure 7-48: ABS/TT4 Power, Ground and Warning Lamp Circuit.
58
BLK
DLC
C1-19
C1-34
7
15
606 OR
607 TN
13
14
DIAGNOSTIC
ABS
ECU
IGN
FUSE
2B
5 AMP
Exterior
Fuse
Box
9
601 PK
TO IGNITION
SWITCH
19
8
990 PK
991 LB
990 PK
ABS
VALVE
RELAY
G2
575 OR
FUSE IC
25 AMP
Exterior
Fuse
Box
ABS
WARNING
RELAY
58BK
G2
G2
58 BK
603 RD
ABS W
ARNING
C1-52
C3-E2
ABS WARNING
LAMP
TO GUAGES
FUSE
C1-21
961 PP
C3-D3
ATC INFORMATION
LAMP
TO GUAGES
FUSE
1
26
3
TO
BATTERY
9-S07-002
27
570 BK
G2
C9-C
C10-E
STATUS
CENTER
RH
STATUS
CENTER
LH
____________________________________________________________
Brake System 7-45
®
05745159
Figure 7-49: 35 Pin ECU Connector Female Half
PIN
CKT
COLOR
DESCRIPTION
1
990
PK
ABS valve relay input
3
961
PP
TT4 lamp activation
4
977
WH
Right rear inlet valve activation
5
976
RD
Right rear outlet valve activation
6
973
OR
Right front inlet valve activation
7
972
YL
Right front outlet valve activation
8
991
LB
ABS valve relay activation
9
601
PK
Ignition feed
11
605
PP
Positive pump relay activation
12
610
RD
Negative pump relay activation
13
606
OR
Diagnostic line
14
607
TN
Diagnostic line
15
997
BK
Left front wheel speed sensor low
16
995
BK
Right rear wheel speed sensor low
17
999
BK
Right front wheel speed sensor low
18
993
BK
Left rear wheel speed sensor low
19
990
PK
ABS valve relay redundant input
21
975
LB
Left rear inlet valve activation
22
974
DB
Left rear outlet valve activation
23
971
PP
Left front inlet valve activation
24
970
TN
Left front outlet valve activation
C7 FEMALE ONLY
9-S12-043
D1
D2
D3
D4
D5
D6
D7
D8
D9 D10 D11 D12 D13 D14 D15 D16 D17 D18
D19 D20 D21 D22 D23 D24 D25 D26 D27 D28 D29 D30 D31 D32 D33 D34 D35
7-46
Brake System
_____________________________________________________________
®
Figure 7-50: 13 Pin Modulator Connector Female Half
25
677
GY
Shuttle valve switch signal
26
603
DG
ABS warning lamp activation
27
570
BK
Ground
30
609
YL
Pump motor monitor
31
978
BK
Reference ground
32
996
BR
Left front wheel speed sensor high
33
994
BR
Right rear wheel speed sensor high
34
998
BR
Right front wheel speed sensor high
35
992
BR
Left rear wheel speed sensor high
PIN
CKT
COLOR
DESCRIPTION
PIN
CKT
COLOR
DESCRIPTION
1
970
TN
Left front outlet valve activation
2
971
PP
Left front inlet valve activation
4
977
WH
Right rear inlet valve activation
5
976
RD
Right rear outlet valve activation
6
978
BK
Reference ground
9
677
GY
Shuttle valve switch signal
10
972
YL
Right front outlet valve activation
11
973
OR
Right front inlet valve activation
12
975
LB
Left rear inlet valve activation
13
974
DB
Left rear outlet valve activation
9-S12-014
C11 FEMALE ONLY
CAV 1
CAV 6
CAV 10
CAV 5
CAV 9
CAV 13
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