1997 ASTON MARTIN DB7 fuse

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Page 103 of 421

ASTON MARTIN DB7 1997 Workshop Manual
NO COLOUf 907
m
886
WU
908
N
916
N
895
RS
920
RS
692
RG
918
RC
909
N
917
N
910
N
887
NR

PIN 1 •/ 3 4 5 6 7 e 9 10 II IS
AREA 01 02 01 02 01 02 01 02 01 02 01 02

^^c^ldrj

Page 129 of 421

ASTON MARTIN DB7 1997 Workshop Manual
Electrics
Relay Location Index - 97 MY 5^^?
Relay Locations
Left Forward
Engine Bay LH Side (from front to
Function
Front Fog Lights
rear)
Cruise Control Clutch Switch(Man)
Air Pump
Horn
D

Page 131 of 421

ASTON MARTIN DB7 1997 Workshop Manual
Electrics

Relay Location Index - 97 MY
D^^
Facia Component Panel
- LHD
Passenger
Function
Heated Front Screen Timer Relay
Multi-Function Module
Low Coolant Transmitter Module
Main Relay (R

Page 138 of 421

ASTON MARTIN DB7 1997 Workshop Manual
NO 140 141

COLOUR
PIN
NV
1
B
2

AREA 3.C4 3,A2

NO 14? 143

COLOUR
PIN
NP
1
m
2

AREA 3.05 3.D4
< lOlO
5! —fsi Q: 3 O _J O
(O
omcD
.

f

i^<S(c

q
ifll?

< rrt

o
Si
il

NO 140 141

COLOUR
PIN
NV
1
B
2

AREA 3.C4 3,A2

NO 14? 143

COLOUR
PIN
NP
1
m
2

AREA 3.05 3.D4
< lOlO
5! —fsi Q: 3 O _J O
(O
omcD
.

f

i^
q
ifll?

< rrt

o
Si
il

*s
H
Jz

NO COLOUR 928
B
929
KB
177
BO

172
BG

PIN B9 86 87 87A 30
AREA
3.85-28
3.B3-25
3.D4
3.01
NO COLOUR
PIN
151
B 85
152
U 86
153
OY 87
e7A 150
NS 30

AREA
3.B4-28
3.B3-26
3.A5
3.A6
NO COLOUf 154
W8
155
KB
156
W
157
GU
153
BY

PIN 85 86 S7A e7A 30
AREA 3.D3
3.B5-25
3.B4
3.B5-27
3.A4
FAN
RUN
ON
RELAY
I
87
II
BLUE BASE

87A
AIR
CON
RELAY AIR
CON
W.O.T.
DW|

I
87
II
GREEN
BASE

am
I
87 II
YELLOW BASE

Is-^sl

SCREEN WASH PUMP

I

•Wl|

3n-^ai
NO COLOUR
PIN
AREA 158
B U
B4-28 156
W W 3.A4

FAN MOTOR
2

NO COLOUR
PIN
162
GU
1
2 3
AREA
3.B4-27

c

NO COLOUR AREA
166
8 3.D4
167
B
3.B2-28 EARTH POINT
OINT|—c

NO COLOUR 168
N
169
N

AREA 3.04 3.03 BATTERY
PCS
'osTj-c:
TRINERY SWITCH
NO 159 160
161
COLOUR ON KU
OP
PIN 1 2 3 4
AREA 3.D6 3.06
06
NO COLOUR
PIN
163
GN
I
164
U 2
148
B 3
165
ua 4

AREA 3.B6 3.B3-26 3.A3 3.D3
FAN CHANGE OVER RELAY Is
>
\,1

NO COLOUf 140
NY
166
B
143
WY

175
NP
176
KB
171
UY
170
UN
177
BG

PIN 1 2 3 4 5 6 7 8 9
AREA 3.AI 3.C2 3.BI
3.D4
3.B5-25
3.02 3.D2 3.A3 "a

D
D
•
D
D
D
hi
D
Q

Dinr
D
D
D
D
D
•

NO COLOUF 180 GW
150
NS

138
YR
178
BK
149
WR

163
GN

145
LGB

147
BS

PIN 1 ? 3 4 5 6 7 B 9 10 II 12 13 14 15 16 17 18 19 20
AREA 3.05
3.A4
3.D5 3.D5 3.A3
3.DI
3.A2
3.A2
NO COLOUR
PIN
159
ON 1
160
KU 2
161
OP 3

AREA 3.DI 3.DI 3.DI
J RH
Sll
I REPEA SIDE 1 REPEATER NO 179 180
COLOUR B GW
AREA 3.B4-3.B6 28
NO COLOUR
PIN
170
UN I
181
KB 2
171
UY 3
172
BG
4
5
6^
AREA 3.D4
3.B3-25
3.04 3.A3
NO 173 154 165 174
AIRCON CONTROL
COLOUR U WB UB GU
PIN 1 ? 3 4
AREA 3.B3-3.A5 3.01 3.B4-
26
27
r
^2
FAN FUSE NO COLOUR
PIN
169
N 1
142
NP 2

AREA 3.C2 3.BI
NO COLOUR
PIN
168
N 1
175
NP 2

AREA 3.C2 3.D4
Wiring Diagram
Model
-
Aston Martin
DB7

Harness Title
-
Right Forward
Drawing Part No.
-
B37-84628
Revision
- 0
Sheet
3 of 26 - 97 MY

Page 166 of 421

ASTON MARTIN DB7 1997 Workshop Manual
STOP LAMP
NO COLOUR 807
CB
1097
G
1098
GP

1099
G

RELAY
PIN AREA 85 I4.CI 86 I7.D2 87 I6.B5-I74
87A
30
17X2

REVERSE LAMP RELAY FUEL PUMP RELAY 1

NO COLOUR 803
SLG
1100
W
IIOI
G

STOP LAMP
NO COLOUR 807
CB
1097
G
1098
GP

1099
G

RELAY
PIN AREA 85 I4.CI 86 I7.D2 87 I6.B5-I74
87A
30
17X2

REVERSE LAMP RELAY FUEL PUMP RELAY 1

NO COLOUR 803
SLG
1100
W
IIOI
GN

1102
NP
PIN 85 88
8/
R7A 30
AREA M.CI 17.02 I6.B3-I7I
I6B5-I75
NO COLOUfl 335 OR 1103 KB 1087 UG 337 RN 1104 NP
PIN BS R6 87 R7A 30
AREA I4.CI I7.B3-I79 I6.A5 14.01 17.02
FUEL PUMP RELAY 2
NO COLOUR 336 0 1105 KB 1089 UR 809 YN 1106 NP
PIN AREA 85 I4.CI 86 I7.B3-I79 87 le.AG 87A I4.CI 30 I7.C2
TILT SENSOR RELAY
NO COLOUfl 1109 B 1110 WK
nil BO 1112 B
PIN AREA 85 17.84-183 S6 I7.B4-I82 87 87A I4.B4-I58 30 I7.B4-I83

I^OBROWN
BASE
87A ^JSSPBL

[jylYELLOW
BASE

ma

3«-i

J¥tU

SHEET
16
AREA
B6

10 in

'-fts'^B^-'

lijZ-il
[NATURAL
BASE

L 3JA
NO COLOUR AREA 1107
N
17.83-180 llOe
N
17.83-181
NO COLOUR 1125
N
1126
G
1127
G
1128
N
1130
N
1072
R
1075
R
1133
G
1135
N
1137
G
1138
N
1140
N
PIN 1 2 3 4 5 6
/
8 9 10 II
12 13
AREA 17.83-180 16.86-177 16.86-177 I7.B3-I8I I7.B3-I80 14.84-155 14.84-155 16.86-177 17.83-180 I6.B6-I77 I7.B3-I8I I7.B3-I8I
c

SHEET
25
AREA
B/C6

CZE
BOOT FUSEBOX HARNESS
•^-
rp
NO COLOUR
iioe NP 1099 G 1097 G 1129 NP 1115 NS 1131 RS 1132 RG 1134 m 1136 NS 1100 W 1139 NP 1104 NP
PIN 1 2 3 4 5 6 7 8 9 10 II

\l
AREA I7.A3 I7.AI I7.AI 16.83-168 I7.C4 I6.B5-I76 I6.C3-I70 17.84-182 I7.B5-I84 I7.A2 16.85-175 I7.A2

I

D
a
D
D
D
D,
D
c^
D
D
D
0
D
D

NO COLOUR
PIN
1113
VS A
1114
NS B

AREA 17.86 I7.C6

i'^AAA'

ITYRE
COMPRESSORI
NO COLOUR AREA 1115
NS
I7.DI 1116
8 I7.B4-IB3
5^

\_/
SECURITY NO COLOUR 1055
TIN
1026
KB
1117
BR
1118
BR
1028
HI
772
OR
1027
U

1119
WY
3
YS
1113
YS
1120
GR
1121
8
1122
8RD

1021
UO
773
OU

374
0

1
LG
1082
PG
1123
GW
1114
NS
1124
NS

SYSTEM
PIN 1 ? 3 4 5 6
7 8 9 10
II II 12 13
14 15
16
17 18 19 20 ?l
22 23 24 25 2b

AREA I6.C2 I4.B6 16.84-172 16.86-178 14 .C6 I4.CI 14.06
17.84-182 M.BI I7.B5 I5.B1-163 17.84-183 I6.82-I67A
I4.C4 I4.CI
I5.BI
I4.CI ie.C4 16.81-167 17.85 17.85-184
'^7
Wiring Diagram

Model
- Aston Martin DB7

Harness
Title - Rearward - 4

Part
No. - B37-84642

Revision
- 0
Sheet
17 of 26-97 MY

Page 182 of 421

$ASTON MARTIN DB7 1997 Workshop Manual \L^C=£ NO COLOUR 1106 HP 1099 G 1097 G 1129 NP 1115 NS 1131 RS 113? RG 1134 WK 1136 NS 1100 W 1139 H? 1104 NP PIN 1 2 3 4 5 6 t S 9 10 II 12 13 AREA 2T.a 2?.CI 27.CI 27.01 27.CI 27.CI 27.C$

Page 197 of 421

ASTON MARTIN DB7 1997 Workshop Manual
^=2?
Electrics
Airbag System
Airbag Diagnostic Module Fault Codes
Fault codes may be extracted in one of two ways:
Through the upper diagnostics connector using the PDU, or as a series of flashe

^=2?
Electrics
Airbag System
Airbag Diagnostic Module Fault Codes
Fault codes may be extracted in one of two ways:
Through the upper diagnostics connector using the PDU, or as a series of flashes of the SRS/AIRBAG warning lamp.
Each series of flashes represents a two digit number, representing a fault code from the list below which is recorded
in priority order (i.e. If two faults are present, the code nearest the top of the list will flash. Clear the first code, then
the second code will flash). Fault analysis procedures for each code are included on the following pages.
_ No Airbag warning lamp - Inoperative airbag warning lamp or no ignition voltage to the diagnostic module
Continuous airbag warning lamp- Diagnostic module disconnected or inoperative, or a seatbelt pretensioner
fault (see pretensioner diagnostics).
12 Low battery voltage
13 Airbag circuit shorted to ground
14 Front crash sensor circuit shorted to ground
21 Safing sensor incorrectly mounted in the vehicle
22 Safing sensor output circuit shorted to battery voltage
23 Safing sensor input feed/return open circuit
24 Safing sensor output feed/return open circuit
32 Drivers side airbag circuit high resistance or open circuit
33 Passengers side airbag circuit high resistance or open circuit
34 Drivers side airbag circuit low resistance or short circuit to ground
35 Passenger side airbag circuit low resistance or short circuit to ground
41 Front right crash sensor feed/return open circuit
42 Front left crash sensor feed/return open circuit
44 Front right crash sensor incorrectly mounted on the vehicle
45 Front left crash sensor incorrectly mounted on the vehicle
51 Diagnostic module internal fuse intermittent or short circuit to ground
52 Back-up power supply - overvoltage fault
53 Front crash sensor circuits resistance to ground or internal diagnostic module failure
Rapid continuous flashing of the airbag lamp (no fault code)- all front crash sensors disconnected
September 1996 6-81

Page 199 of 421

ASTON MARTIN DB7 1997 Workshop Manual
"^p
Electrics
Airbag System
No Airbag Warning Lamp

I
noperative lamp, lamp ci rcu it or no ign ition voltage
to the diagnostics module
Normal Operation
The airbag warning lamp is designed to

"^p
Electrics
Airbag System
No Airbag Warning Lamp

I
noperative lamp, lamp ci rcu it or no ign ition voltage
to the diagnostics module
Normal Operation
The airbag warning lamp is designed to illuminate
for approximately six seconds when the ignition is
switched
on.
This period
is
allocated for satisfactory
performance of the airbag system self test.
Note: The a irbag warning lamp is
driven
by
the instrument

pack and not directly by the airbag diagnostic module.
The airbag diagnostic module requires an ignition
supply to pin
1
to energise the airbag warning lamp
circuit. If the warning lamp circuit is open, or the
diagnostic module does not receive an ignition
voltageatpini, the warning lamp will not illuminate.
Open circuit in the warning lamp supply, in
conjunction with another system fault, will cause
the diagnostic module to emit five tones every 30
minutes while the ignition is switched on. Repair
the faulty circuit before further diagnosis.
Note:
The
diagnostic module will not emit
the
five tone
signal if the warning lamp
is
open circuit and
there
is no

system
fault.

Possible Causes
Defective airbag warning lamp
Faulty wiring in the airbag warning lamp circuit
Loss of ignition voltage at diagnostic module pin 1.
Loss of ground at diagnostic module pin 3
Instrument pack fault
Fault Analysis
WARNING: Read and adhere to all warnings and
safety procedures at the start of this section when
working on the airbag
systent.

1.
Remove the instrument pack and check the airbag
warning lamp.
If the lamp is good, go to step 2.
If the lamp is defective, replace it, switch on the
ignition and check that the lamp is now on for
approximately six seconds after ignition on.

2.
Disarm the airbag system and fit airbag simulators
(6.4.21.4).
9.
Connect the PDU. Switch on the ignition. Measure
the 12V ignition supply voltage from airbag
diagnostic connector pin
1 -1
{+) to chassis ground.
If ignition voltage is present, go to step 6. If ignition
voltage is not present, go to step 4.
Checkfuse F15passengersidefuseboxRHDorF17
passenger side fusebox LHD (Ignition supply to the
diagnostic module pin
1
-1). If the fuse is good, go
to step 5. If the fuse is replaced, go to step 6.
Check for an open circuit on the YW wire from fuse
F15 passenger sidefusebox(F17 LHD)todiagnostic
module pin 1-1. If continuity is good, isolate the
fault in the 12V supply to fuse Fl 5 (Fl 7) and then
go to step 9.
Measure the voltage from diagnostic module pin
1
-
1 to diagnostic module pin 1-3. If 12V is not
present, isolate and service the open circuit in the
diagnostic module ground to pin 1-3. Then go to
step 7.
Switch the ignition off. Set up to measure the
voltage from DM pin
1
-4 to DM pin
1
-5 during the
first six seconds after ignition on.
Switch on the ignition, the warning light signal to
the instrument pack should switch for six seconds
after a brief delay.
If the signal does not switch, the diagnostic module

is
fau Ity. Replace the modu
le,
switch on the ign ition
and check that the airbag warning lamp does light
for six seconds after ignition on.
If the signal does switch for approx. six seconds
after ignition on, the fault is in the instrument pack
or wiring, go to step 8.
Check continuity of the YW wire from diagnostic
module pin
1
-4 to instrument pack 16 way plug pin

2.

If continuity is good, service the instrument pack
and then retesttoensure correct indication from the
airbag warning lamp at ignition on.
If continuity is defective, service the wire and then
retest to ensure correct indication from the airbag
warning lamp at ignition on.
Disconnect the PDU, and rearm the airbags
(6.4.21.4). Switch on the ignition and check for
correct indications from the airbag warning lamp.
September 1996 6-83

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