1997 ASTON MARTIN DB7 Workshop Manual

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Electrics
Control Switch - Removal Procedures
6.5.07 Cruise Control, Window and
Gearshift Switches
Procedure

1.
Protect the wood finisher around the switches.
6.5.08 Seat Control Switch Panels
Procedure

1.
Remove the wood trim above the passenger side

dash.

2.
Remove the ashtray (Fig
1
-1).
Figure 7. Switch Removal

2.
Using a suitable lever, raise each end of the switch
to release the spring clips.
3. Pull the switch clear oi the wood finisher and
disconnect the switch wiring.
Figure!. Ashtray and Ashtray Well
3. Remove the gear selector knob.

4.
Release the screw in the ashtray well (Fig 1-2)
securing the gearshift and centre console surround.
5. Raise the console surround and support it to gain
access to the seat control panel.
6. Disconnect the multi-plug in the seat switch loom.
7. Remove 2 screws (Fig 2-1) and the seat control
switches.
Figure 2. Seat Control Switch Panel Removal
May 1996 6-9

Electrics
Interior Lamps and Front Seat - Removal Procedures EM^^^
6.6.01 Front Interior Lamps
Procedure

1.
Releasethequarterturnfasteneronthefrontinterior
light assembly and lower the assembly from the
roof liner.
Figure 7. Front Interior Lamp
2. Disconnect the interior lamp plug and remove the
interior lamp assembly.
6.6.02 Rear Interior Lamps
Procedure

1.
Release the rear upper trim panel.

2.
Remove two spire washers and the rear interior
lamp assembly.
6.6.03 Front Seat Removal
Procedure

1.

2.

Motor the front seat forward and remove the rear
securing bolts for the seat rails.
Motor the seat to the rear and remove the front seat
rail securing bolts.
Figure 1. Front Seat Removal
3. Lift the footweil carpet, release the access plate
securing screws and remove the plate to gain
access to the seat control unit.

4.
Cutand remove thetywrapssecuringtheseat loom.
5. Disconnect the seat harness connectors at the
control unit.
6. Remove the seat assembly.
Figure 7. Rear Interior Lamps
3. Disconnect the lamp wiring and remove the lamp
assembly.
6-10 May 1996

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Electrics
Front Seat Runner and Rail Motor - Removal Procedures
6.6.04 Front Seat Runner Assembly
Procedure

1.
Remove the seat from the car.
7>
Figure 1. Front Seat Runner Removal
2. Cut the tywraps (Fig 1-4) securing the seat belt
buckle harness and disconnect the buckle harness
plug (Fig 1-5).
3. Position the runneras required and release the bolts
(Fig 1-3) securing the front and rear of the seat

frame.

4.
Release the front harness from its retaining clips
and disconnect the multi-plugs (Fig 1-8).
5. Remove the complete seat runner assembly (Fig
1
-

6).

6. Remove the seat belt bolt trim cover and remove
the seat belt bolt (Fig 1-2), buckle and buckle
bracket (Fig 1-9).
7. Fitandsecuretheseatbeltbuckletothereplacement
seat runner assembly.
6.6.05 Front Seat Rail Motor
Procedure

1.
Remove the seat from the vehicle.

2.
Remove the front seat runner assembly from the
seat.
3. Remove the seat harness clamp (Fig
1
-1).

4.
Disconnect the seat rail motor plug (Fig
1
-10).
Figure 1. Front Seat Rail Motor Removal
5. Loosen the motor securing screws (Fig 1-11) and
remove the motor/drive assembly.
May 1996 6-11

Electrics
Lumbar Support, Recline Motor and Seat Control Unit - Removal Procedures
6.6.06 Lumbar Support Motor
Procedure

1.
Remove the seat from the car and remove the seat
back finisher panel.

2.
Disconnect the lumbar motor plug and the lumbar
diaphragm air line (Fig 1) and remove the motor.
Figure /. Lumbar Support Motor Removal
6.6.07 Seat Recline Motor
6.6.08 Seat Control Unit
Procedure

1.
Lift the footwell carpet, release the access plate
securing screws and remove the plate to gain
access to the seat control unit.
Figure 1. Seat Control Unit Removal
2. Disconnect the multiplug from the control unit.
3. Release the securing screws and remove the seat
control unit.
Procedure

1.
Remove the seat from the car and remove the seat
back finisher panel.

2.
Disconnect the recline motor connector.
Figure 1. Seat Recline Motor Removal
3. Disconnect the trigger cable from the motor.

4.
Loosen two screws and remove the recline motor
from its bracket.
6.7.01 Door Edge Lamps
Procedure

1.
Lever the lamp assembly from the door
edge,
taking
precautions to protect the door paintwork.
Figure 1. Door Edge Lamp Removal
2. Disconnect the lamp wiring and remove the door
edge lamp assembly.
6-12 May 1996

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Electrics
Rear Lamp Cluster / Central Locking System / Door Lock Motors
6.7.02 Rear Lamp Cluster Door Mounted Components
Procedure

1.
Remove the rear lamp cluster inner cover.

2.
Release the boot rear liner
3. Release the two nuts and one screw securing the
rear lamp surround and remove the surround.
Figure 7. Rear Lamp Cluster

4.
Disconnect the rear lamp cluster multi-plug.
5. Remove six nuts from the rear of the assembly and
lift out the lamp cluster.
Central Locking System
Description
Thecentral locking system consistsofmotoroperated lock
actuators in both doors, the boot and the fuel flap
mechanism. The central locking control module is located
inside the drivers side 'A' post.
Each motordriven lock actuator incorporatesa microswitch
which will signal a change of state when any motor runs
to drive the actuator. The microswitches are of the
changeover type and provide an earth for the lock or
unlock signals to the control unit.
The two door lock inputs to the control unit are connected
together so that operation of either door lock with the
ignition key will simultaneously operate the other door
lock. Similarly, the unlock inputs to the control unit are
also connected together for simultaneous operation.
The boot will remain locked or will be unlocked
simultaneously with the doors dependant on the boot lock

position.
With the boot key turned clockwise, the boot
lock operates in unison with the doors. With the boot key
turned anticlockwise, the boot lock cannot be unlocked
using the central locking system.
The boot can be opened at any time using the ignition key
irrespective of the central locking status.
6.7.03 Door Central Locking Motors
Procedure

1.
Remove the door inner panel.

2.
Disconnect two plugs on the central locking motor
unit and one plug on the door closed switch.
3. Release the interior door catch operating rod from
its guide clips and detach it from the lock
mechanism.

4.
Disconnect the outer lock operating rod.
5. Remove three lock securing screws from the door
rear edge.
6. Remove the motor and lock through the access

hole.

7. Remove the motor securing screws and remove the
motor from the lock assembly.
May 1996 6-13

Electrics
Electric Windows - Fault Analysis / Window Motor Removal
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Electric Windows
Description
Power to the window wind circuits is available
when the ignition switch is on and is supplied
through a thermal cut-out to the left and right
window switches. The switches are double pole
plus earth so that the current through a window
motor may be switched in either direction to raise
or lower the window.
DB7 uses frameless door windows which seal
against rubber strips around the body shell door

opening.
To avoid damaging these seals during
door opening, the door glass must be lowered
before the door can be opened. This function is
controlled by the window control units. The units
are mounted on the inside of each door frame and
will sense if a door handle is pulled to open the
door. Before releasing the door lock, the control
unit will drive the window wind motor briefly to
lower the door window glass down until it clears
the window seals. Similarly, after closing a door,
the window motor will be run to raise the door glass
to seat the glass against the body seals.
Fault Analysis Procedure
a) If a window fails to operate, check for fuse failure
and the connectors for poor or open contacts.
b) Check the thermal cut-out by shorting across it and
operating either window. If the windows operate
with the short
ci rcu
it but not without, the cut-out is
faulty.
c) With the ignition on, battery voltage should be
available between the inputterminalsof the switches
and chassis. Operate each switch and ensure that
battery voltage is available between the switch
output terminals and chassis.
d) Measure voltagefrom each switch inputterminalto
the switch earth return terminal. If no voltage is

measured,
the earth return line is open circuit.
e) Measure continuity through the wiring from the
switches to each motor. If continuity is correct,
remove the motor for bench testing.
6.7.04 Door Window Motor
Procedure

1.
Remove the door trim panel and the glass inner
sealing
trim.

Figure!. Window Securing Screws
2. Position the window to gain access to the slider
bracket and glass securing screws.
3. Disconnect the battery earth
lead.

4.
Remove two screws securing the glass to each of
the two slider brackets. Loosen the two screws
securing the glass to the elevator
rail.

6. Slide the elevator rail forwards until the glass
securing screws are opposite the wide opening of
the rail keyhole slots and remove the glass from the
top of the door.
7. Disconnect the window motor multiplug.
6-14 May 1996

in:s^^^
Electrics
Electric Door Mirrors
Remove four bolts from the motor bracket and one
from the forward end of the lower elevator
rail.

Figure 2. Motor and Elevator Securing Screws
9. Lift out the elevator assembly through the door top.
6.7.05 Door Mirror Assembly
Procedure

1.

2.

Removethe door interiortrim panel and disconnect
the door mirror switch.
Disconnect the door mirror harness
plug,
noting
the correct connection. Release the door mirror
loom from its clips.
Note:
Two
plugs are fitted in the door loom, one for left
and one for right hand
doors.
Ensure
that
the
correct plug
is connected on
reassembly.

Figure 7. Door Mirror Assembly
3. On the outside of the door, lift the sealing ring on
the mirror mount and release one grub screw
securing the mirror.

4.
Remove the mirror from the door.
5. Remove the door mirror adaptor ring from the door
to permit the mirror wiring socket to pass through
the mounting hole and then remove the mirror.
May 1996 6-15

Electrics
Transmission Control Module "3^^
6.7.06 Transmission Control Module
Renew (TCM)
Data
Torque Figures
Nut TCM to mounting bracket 2-3 Nm
Procedure
Disconnect the battery.
1.

2.

3.
Remove the rear seat squab. Remove the rear
quarter trim and the rear quarter lower trim pad.
Remove the TCM to mounting bracket securing
nuts (Fig.
1
-2) and remove one bracket.
Figure 1

4.
Remove the TCM and mounting bracket assembly
from the body mounting bracket (Fig. 1-1).
5. Disconnect the TCM multi plug (Fig. 1-4) and
remove the TCM.
6. Fit and align the left mounting bracket (Fig.
1
-5) to
the new TCM, and secure with two nuts. Connect
the harness multi plug (Fig. 1-4) to the TCM. Fit the
TCM and left mounting bracket assembly to the
body mounting bracket (Fig. 1-1), ensure the left
bracket slot is fully seated.
7. Fit the right mounting bracket (Fig.
1
-3) to the TCM
and to the body mounting bracket. Secure with two

nuts.

8. Refit the rear quarter lower trim pad.
9. Refit the rear quarter trim panel.

10.
Refit the rear seat squab.

11.
Reconnect the battery.
6-16 May 1996