ac system HONDA CIVIC 1999 6.G Workshop Manual

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A/T Gear Position Indicator (conrd)
- How the Circuit Works
With the ignition switch in ON (ll) or START (lll),
voltage is applied to the A,/T gear position indicator.
The A,/T gear position switch provides a ground for
each position. As an input is grounded, its indicator
light comes on. lf you select R, for example, ground
will be provided to the input of the A,/T gear position
indicato( and the R indicator will come on.
With the headlight switch in PARK or HEAD, voltage
is applied to the RED/BLK wire terminal. This
changes the indicator panel illumination from fixed
to controlled by the dash lights dimmer input
through the RED wire.
When the powertrain (all except '96-'98 CVT) or
transmission ('96198 CVT) control module (PCM or
TCM) detects an abnormality in the automatic
transmission control system, or when you request
diagnostic trouble codes through the service check
connector, the PCM or TCM will make the D4 (D for
CVT) indicator light blink.
Refer to the Service Manual (Section 14,
Automatic Transmission) for specific tests or
troubleshooting procedures.
\ia
89-2

Fog Lights
_ Vehicles pre'wiredfor accessorysecurity system
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Headlights
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Vehicles pre-wired- - - for accessorysecurity system
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110-13
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Dash and Console Lights
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114

Power Windows (contd)
- How the Circuit Works
CAUTION: You could iniure your arms, hands, or
fingers if you unintentionally switch the driver's
window to "automatic down" while working in
that door with the power on. Disconnect the
window switch conneclot or the battery when
working in the driver's door.
System Description
The operation of the power windows is controlled by
the main switch in the power window master switch.
When the main switch is in OFF, only the driver's door
window can be opened or closed. With the main
switch ON, all windows can be ooened or closed
either by swtches in the master panel, or swttches in
the doors. The driver's window switch also has an
automatic down mode which is tumed on by pushing
the switch down to its second oosition.
The power windows are driven by reversible motors.
Each motor is protect€d by a built-in circuit breaker.
lf the window switch is held on too long (with the
window obstructed, or after the window is fully up or
down), the circuit breaker opens the circuit. The
circuit breaker resets automaticallv as it cools.
Driver's Window
With the ignition switch in ON, voltage is provided to
the coil of the power window relay through fus€ 24.
The contacts of the power window relay close, and
voltage is applied to the driver's switch. When you
push the power window master switch to UP, voltage
is applied to the driver's window motor. (The motor's
ground path is back through the master power
window switch.) The driver's window motor then
drives the window up. When you push the switch to
DOWN, voltage is applied in the opposite direction
and the motor drives the window down.
Automatic Down (Driver's Window)
With the ignition switch in ON or START, voltage is
applied to the coil of the power window relay. The
contacts of the power window relay close and
voltage is applied lo the power window master
switch. When you push the driveas switch to the
AUTO DOWN position, voltage is applied through
the driver's switch to the driver's window motor. The
control unit receives pulses at the pulser input while
the motor is running. When the window is fully
down, the motor stops, and pulses are no longer
generated by the pulser. This is sensed by the
control unit at the pulser input, and voltage is no
longer applied to the driver's window motor.
Passenger Windows
With the ignition switch in ON, voltage is applied to
the coil of the power window relay through fuse 24.
The contacts of the power window relay then close,
applying voltage to the individual window switches
and the power window master switch. With the
master panel main switch ON, the passenger
windows can be ooerated from the individual
window switches or from tho master panel switches.
When you push the front passengsr's window
switch to UP, voltage is applied to the f ront
passenger's window motor. (The motor is grounded
through the contacts in the front passenger's
window switch and the oower window master
switch.) The window moves up as long as you hold
the switch in the UP position. lf you push the switch
to DOWN, voltage is applied in th€ opposite
direction to the front passenger's window motor, and
the window movss down as long as you hold the
switch in the DOWN Dosition. The window switches
in the other doors operate similarly.
When you push the front passenger's switch in the
master panel to UP, voltage is applied through the
front passenger's window switch contacts to the
front passengefs window motor. (The motor is
grounded through the contacts in the front
passenger's window switch and the power window
master switch.) The window moves up as long as
you hold the switch in the UP position. lf you push
the switch to DOWN, voltage is applied in the
opposite direction to lhe front passenger's window
motor, and the window moves down as long as you
hold the switch in the DOWN position. The other
passenger window switches in the master panel
operate similarly.
Refer to the Service Manual (Section 23, Electrical)
for specific tests or troubleshooting procedures.
120-4

Power Door Locks (cont'd)
- How the Circuit Works
Keyless Entry System
The keyless door locks combine the power door
locks with a remote keyJob transmitter. The keyless
receiver unit is part of the radio. The keyless
receiver unit receives direct inputs f rom the ignition
key switch, the passenger door switches, and an
indirect input trom the driver's door switch through
the integrated control unit.
Power Door Locks (With or Wlthout Keyless)
The power door lock system is made up of the
oower door lock control unit. driver's door lock
switch, and individual door lock actuators. The
power door locks are controlled by the driver's door
lock switch and the driver's door lock actuator
switch.
Transmitter (With Keyless Entry)
The transmitter sends coded radio wave signals to
the keyless receiver unit when one ot its buttons is
pressed. Each transmitter has a unique code that
must be 'laught" to the keyless receiver unit before
it can operate the door locks or any other lunction.
Up to 4 transmitters can be programmed to operate
the keyless door locks.
Door Locking (With or without Keyless Entry)
When you push the driver's door lock switch to the
lock position, ground is applied to the GBN/IVHT
wire to the oower door lock control unit. The control
unit then applies battery voltage to the WHT/RED
wire and ground to the YEURED wire. The
passenger door lock actuators then activate to lock
the corresponding door locks.
When you lock the driver's door with the key or door
lock knob, it is mechanically locked, and the driver's
door lock actuator switch applies ground to the
oower door lock control unit. The control unit then
applies battery voltage to the WHT/RED wire and
ground to the YEURED wire, activating the
passenger door lock actuators which lock the doors.
Dool Locking with Transmitter
When you press the LOCK button on the remote
transmitter, the power door lock control unit applies
battery voltage to the WHT/RED wire and ground to
the YEURED wire. The passenger door lock
actuators then activate and lock the doors. A ground
slgnal is also applied to the BLU/RED wire to lock
the driver's door. lf any door is open, you cannot lock
it using the remote transmitter.
Door Unlocking (With or Without Keyless Entry)
When you push the driver's power door lock switch
to the unlock position, ground is applied to the
GRN/ORN wire to the power door lock control unit.
The control unit then applies battery voltage to the
YEURED and BLU/RED wires and ground to the
WHT/RED wire. The door lock actuators then
activate to unlock the doors.
When you unlock the driver's door with the key or
the door lock knob, it is mechanically unlocked; the
other doors do not unlock.
Door Unlocking (With Transmltter)
When you press the UNLOCK button on lhe remote
transmitter once. the power door lock control unit
applies battery voltage to the WHT/RED wire and
ground to the BLU/RED wire to unlock the driver's
door. When you press the UNLOCK button twice,
the control unit then applies ground to the YEURED
wires to activate the passenger door locks. lf you do
not open a door within 30 seconds after unlocking
the doors with the transmitter, the doors
automatically relock.
Transmltter Programming
1 . Turn the ignition switch ON (ll).
2. Press and hold the Valet-Disarm button on the
radio (between the AM/FM button and the
CD/TAPE button) to enter the programming
mode. (Continue to hold the button during the
procedure, or programming will be cancelled.)
Check that the power door locks cycle to confirm
that you're in the programming mode.
3. Press the "LOCK' or "UNLOCK' button on the
transmitter. Check that the power door locks
cycle to confirm that the code was accepted.
4. Press the "LOCK" or "UNLOCK" button on each
of the remaining transmitters. (You can program
up to four transmitters per vehicle.)
5. After all the transmitters have been
programmed, release lhe Valet-Disarm button to
exit the programming mode.
Beep On/Oft Feature
'I . Press and hold the LOCK and OPTION buttons
on the transmitter.
2. Watch the transmitter's LED:
One flash: Beeo activated.
Two tlashes: Beeo deactivated.
130-4

Power Door Locks (cont'd)
Keyless Entry Does Not Work In Any
Mode
NOTE: Before beginning, verify that all the
transmitters are programmed to the vehicle.
1 . Does the radio work properly?
Yes - Go to step 9.
No - Go to the neld step.
NOTE: For steos 2 - 8. refer to the schematic dia-
gram for the Stereo Sound System on page 150.
2. Are fuses 28 (in the under-dash fuse box) and
fuse 47 (in the under-hood fuse box) OK?
Yes - Go to step 4.
No - Replace the blown fuse, then go to the
nen steo.
3. Does the fuse blow again?
Yes - Locate and repair the short.
No- Retest the system.
4. ls the vehicle equipped with the optional security
system?
Yes - Go to the next steP.
No - Go to steD 6.
5. Does the keyless entry work correctly when the
security control unit connector is disconnected?
Yes - Faulty security system, go to security
system for f urther troubleshooting.
No - Go to the next step.
6. ls there battery voltage at terminal 4 of the radio
main harness connector (A)?
7.
=A
Yes - Go to the nen step.
No - Locate the open in the wiring between
tuse 47 and the radio.
ls there battery voltage at terminal 5 of the radio
main harness connector (A), when the ignition
switch is in the ACC (l) or ON (ll) position?
Yes - Go to the next step.
No - Locate the open in the wiring between
fuse 28 and the radio.
130-8
8. ls there continuity from terminal 14 of the radio
main harness connector (A) to ground?
Yes - Replace the radio.
No - Repair the open in the wiring between the
radio and the ground (G501).
9. Does the transmitter LED come on when any ot
the buttons are oressed?
Yes - Go to steo 12.
No - Go to the next steo.'10.ls the transmitter battery installed with the
positive side facing up?
Yes - Ensure that the battery contact tabs are
repositioned, then replace the battery.
Remove the key from the ignition, then
close the doors and trunk. Press the
LOCK button on the transmitter six times,
then go to the next step.
No - Ensure that the baftery contact tabs are
repositioned, then reinstall the batlery
correctly. Then reprogram the transmitter
and retest it. Use the procedure on page
1 30-4 f or transmitter programming.
11 . Does the transmitter LED come on when any of
the buttons are oressed?
Yes - Go to the next step.
No - Replace the transmitter and program it by
using the procedure on page 130-4.
12.Does the system work properly in all modes?
Yes - Finished. The system is OK.
No - Go to the next steD.

\,113. Recheck with a known good transmitler
reprogrammed to the vehicle. Does the system
work properly in all modes?
Yes - Replace the transmitter and program it by
using the procedure on page 130-4.
No - ReDlace the radio.
\lr
\
Ceiling Light Does Not Come On When
The Doors Are Unlocked With The
Transmitter
NOTE: The vehicle must have a tactory radio installed.
1 . ls the ceiling light switch in the center position?
Yes - Go to the nexl steo.
No - Reposition the ceiling light switch and
retest.
2. Does the ceiling light come on with the ceiling
light switch in the ON position?
Yes - Go to the next step.
No - Repair the ceiling light circuit.
3. Does the transmitter LED come on when anv of
the buttons are oressed?
Yes - Go to the next step.
No - Check the transmitter battery, then retest.
lf the ceiling light still does not work, go to
the next steD.
4. Recheck with a known good transmitter
reprogrammed to the vehicle. Does the system
work properly in all modes?
Yes - Replace the transmitter and program it by
using the procedure on page 130-4.
No - Go to the ne)d steo.
5. With the keyless entry harness connector (B)
disconnected from the radio. run a jumper wire
f rom terminal 8 to ground.
Does the ceiling light come on?
Yes - Replace the radio.
No - Repairthe open in the keyless entry
harness connector {B) terminal 8
(LT GRN/BLK) wire.
130-9