buttons ACURA RL KA9 1996 Service Repair Manual

Power Doo r Lock s
Transmitte r Tes t ('0 2-04 Models )
NOTE:
• I f th e door s unloc k o r loc k wit h th e transmitter , bu t
th e LE D o n th e transmitte r doe s no t com e on , th e
LE D is faulty ; replac e th e transmitter .
• I f an y doo r i s open , yo u canno t loc k th e doo r wit h th e
transmitter .
• I f yo u unlocke d th e door s wit h th e transmitter , bu t d o
no t ope n an y o f th e door s withi n 3 0 seconds , th e
door s reloc k automatically .
• Th e door s d o no t loc k o r unloc k wit h th e transmitte r
if th e ignitio n ke y is inserte d in th e ignitio n switch .
• Fo r PANI C butto n an d TRUN K butto n operation , hol d
th e butto n lo r mor e tha n 1 second .
1 . Pres s th e loc k o r unloc k butto n fiv e o r si x time s t o
rese t th e transmitter .
• I f th e lock s work , th e transmitte r i s OK .
• I f th e lock s don' t work , g o to ste p 2 .
2 . Ope n th e transmitte r an d chec k fo r wate r damage .
• I f yo u fin d an y wate r damage , replac e th e trans -
mitter.
• I f ther e is n o wate r damage , g o to ste p 3 .
3 . Replac e th e transmitte r batter y wit h a ne w one , an d tr y
t o loc k an d unloc k th e door s wit h th e transmitte r b y
pressin g th e loc k o r unloc k butto n fiv e o r si x times .
• I f th e door s loc k an d unlock , th e transmitte r i s OK .
• I f th e door s don' t loc k an d unlock , g o to ste p 4 .
BATTER Y(CR2025)
4. Reprogra m th e transmitter , the n tr y t o loc k an d
unloc k th e doors .
• I f th e door s loc k an d unlock , th e transmitte r i s OK .
• I f th e door s don' t loc k an d unlock , replac e th e
transmitter .
Transmitte r Programmin g
('02-04 Models )
Storing transmitte r codes :
Th e code s o f u p t o thre e transmitter s ca n b e rea d int o
th e keyles s receive r uni t memory . (I f a fourt h cod e i s
stored , th e cod e whic h wa s inpu t firs t wil l b e erased. )
NOTE : I t i s importan t t o maintai n th e tim e limit s
betwee n th e steps . Mak e sur e th e doors , hoo d an d tail -
gat e ar e closed .
1 . Tur n th e ignitio n switc h O N (II) .
2 . Withi n 1 to 4 sec. , pus h th e transmitte r loc k o r
unloc k butto n wit h th e transmitte r aime d a t th e key -
les s receive r unit .
3 . Withi n 1 to 4 sec. , tur n th e ignitio n switc h OFF .
4. Withi n 1 to 4 sec. , tur n th e ignitio n switc h O N (II) .
5. Withi n 1 to 4 sec. , pus h th e transmitte r loc k o r
unloc k butto n with the transmitte r aime d a t th e
receive r keyles s unit .
6 . Withi n 1 to 4 sec. , tur n th e ignitio n switc h OFF .
7 . Withi n 1 to 4 sec. , tur n th e ignitio n switc h O N (II) .
8 . Withi n 1 to 4 sec. , pus h th e transmitte r loc k o r
unloc k butto n wit h th e transmitte r aime d a t th e key -
les s receive r unit .
9 . Withi n 1 to 4 sec. , tur n th e ignitio n switc h OFF .
10 . Withi n 4 sec. , tur n th e ignitio n switc h O N (II) .
11 . Withi n 1 to 4 sec. , pus h th e transmitte r loc k o r
unloc k butto n wit h th e transmitte r aime d a t th e key -
les s receive r unit .
12 . Confir m yo u ca n hea r th e soun d o f th e doo r loc k
actuators . Withi n 1 to 4 sec. , pus h th e transmitte r
loc k o r unloc k butto n again .
13 . Withi n 1 0 sec. , ai m th e transmitter s (u p t o three )
whos e code s yo u wan t t o stor e a t th e receiver , an d
pres s th e transmitte r loc k o r unloc k buttons .
Confir m tha t yo u can hea r th e soun d o f th e doo r
loc k actuator s afte r eac h transmitte r cod e is stored .
14 . Tur n th e ignitio n switc h OFF , an d pul l ou t th e key .
ProCarManuals.com

Description

Basic operation:

1. OnStar system is activated.

2. Data is transmitted to service provider.

GPS SATELLITES

Two-way cellular communication

with call center.

Dispatch

Rescue/Police

911 CALL

CENTER

3. Call center associate makes appropriate response:

— Accident/Emergency notification (Police, Fire and EMS, etc.)

— Airbag deployment (Accident)

— Roadside assistance

— Stolen vehicle tracking

— Remote door lock/unlock command

— Misplaced vehicle (Flashes parking lights/honks horn)

— Route guidance

— Ride Assist

— Concierge services/convenience

Buttons and indicator:

DOT BUTTON
ONSTAR INDICATOR

Solid Green Light: System OK

Flashing Green Light: Call in

progress

Solid Red Light: System

malfunction

Flashing Red Light: Call

in progress, but malfunction

in system exist.

ONSTAR BUTTON
EMERGENCY BUTTON

Activation and termination

of voice recognition

(VR) for virtual advisor and cellular phone.
Used to connect to call

center (voice based information

service).
Used for emergencies.

Emergency calls have priority

over all others.
ONSTAR CALL

CENTER

(Human Advisor)
Requests for

dispatchProCarManuals.com

OnStar System ('02 Model USA)

OnStar Control Unit Input Test (cont'd)

Disconnect the connectors from the unit

Cavity Wire Test condition
Test: Desired result
Possible cause if result is not obtained

B17

B22

A32

B6

B3

B2

B9

B18

B32
WHT/YEL

WHT

BLK

ORN

RED/GRN

BLK
Under all conditions

Ignition switch in ACC

(I)

Under all conditions

Under all conditions

Under all conditions

Under all conditions
Check for voltage to ground:

There should be battery voltage.

Check for voltage to ground:

There should be battery voltage.

Check for continuity to ground:

There should be continuity.

Connect to ground:

All horns should sound.

Connect to ground:

The taillights should come on.

Check for continuity to ground:

There should be continuity.
• Blown No. 56 (7.5 A) fuse in the

under-hood fuse/relay box

• An open in the wire

• Blown No. 4 (10 A) fuse in the

under-dash fuse/relay box

• An open in the wire

• Poor ground (G601)

• An open in the wire

• Blown No. 39 (15 A) fuse in the

under-hood fuse/relay box

• Faulty horn relay

• Either horn faulty

• Poor ground (G201)

• An open in the wire

• Blown No. 1 (15 A) fuse in the

under-dash fuse/relay box

• Faulty taillight relay

• Faulty taillight system

• An open in the wire

• An open in the wire

Reconnect the connectors to the unit

Cavity Wire
Test condition
Test: Desired result
Possible cause if result is not obtained

B20

B5

A8

A25

A10

A11

A23

A24
GRN/WHT

GRN/RED

GRY

BRN/YEL

WHT

BLU/RED

BLK

WHT
Front passenger's door

lock key cylinder in neu-

tral position

Front passenger's door

lock key cylinder in

locked position

Front passenger's door

lock key cylinder in neu-

tral position

Front passenger's door

lock key cylinder in

unlocked position

Under all conditions

Under all conditions

OnStar "DOT" button

pushed and human

advisor voice comes

on.

OnStar "DOT" button

pushed and human

advisor voice comes

on.

Under all conditions

Ignition switch in ACC

(I). OnStar "DOT" but-

ton pushed. Speak into

the microphone.
Check for voltage to ground:

There should be battery voltage.

Check for voltage to ground:

There should be less than 1 V.

Check for voltage to ground:

There should be battery voltage.

Check for voltage to ground:

There should be less than 1 V.

Check for continuity to ground:

There should be continuity.

Check for continuity to ground:

There should be continuity.

Check for voltage between the A10

terminal and audio unit C9 or B2

terminal:

There should be 1 V or less.

Check for voltage between the A11

terminal and audio unit C8 or B3

terminal:

There should be 1 V or less.

Check for continuity to ground:

There should be continuity.

Check for voltage to ground:

There should be about 4 V.
• Faulty front passenger's door lock

key cylinder switch

• Poor ground (G401, G402)

• An open in the wire

• Short to ground (if you don't have

5 V when you should)

• An open in the wire

• An open in the wire

• Faulty audio unit

• Faulty speaker

• An open in the wire

• Faulty audio unit

• Faulty speaker

• An open in the wire

• Faulty OnStar buttons and microphone

• An open in the wire

• Faulty OnStar buttons and micro-

phone

• An open in the wireProCarManuals.com

OnStar System

OnStar Buttons and Microphone Input Test

'03 Model

1. Pry off the OnStar buttons and microphone/homelink buttons.

2. Inspect the connector and socket terminals to be sure they are all making good contact.

• If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.

• If the terminals look OK, make the following input tests at the connector.

— If any test indicates a problem, find and correct the cause, then recheck the system.

— If all the input tests prove OK, the switches and microphone must be faulty; replace it.

•: A3 and A4 terminals are microphone lines for navigation system.

ONSTAR BUTTONS AND MICROPHONE/

HOMELINK BUTTONS

Cavity Wire
Test condition
Test: Desired result

Possible cause if result is not obtained

A1

A2
WHT

BLK
Ignition switch in ACC

(II) OnStar "DOT" button

pushed. Speak into the

microphone.

Under all conditions
Check for voltage to ground:

There should be 4V.

Check for continuity go ground:

There should be continuity.
• An open in the wire

• An open in the wire

B1

B2

B3

B4

B5

B6
RED/BLK

YEL/GRN

BLU/YEL

WHT/GRN

ORN

BLK
Under all conditions

Ignition switch in ACC

(II)

Ignition switch in ACC

(II)

Ignition switch in ACC

(II)

With the ignition switch

OFF, press and hold the

"DOT" button. Turn the

ignition switch from OFF

to ACC three times and

back to ACC, then release

the "DOT" button.

Under all condition
Check for voltage to ground:

There should be battery voltage.

Check for voltage to ground:

"DOT" button pushed: 280 mV.

"OnStar" button pushed: 1 V.

"Emergency" button pushed: 1.7 V.

Check for voltage to ground:

There should be about 8 V.

Check for voltage to ground:

There should be about 8 V.

Check for voltage to ground:

There should be about 4 V.

Check for continuity go ground:

There should be continuity.
• An open in the wire

• An open in the wire

• An open in the wire

• An open in the wire

• An open in the wire

• An open in the wire

• Poor ground (G401)ProCarManuals.com

Muting Logi c
Wheneve r th e navigatio n syste m is givin g guidance ,
fron t speaker s ar e muted . Whe n th e voic e contro l sys -
te m is bein g used , al l o f th e speaker s ar e muted .
Whe n usin g On-Star , bot h th e audi o syste m an d th e
navigatio n syste m ar e muted , an d th e voic e contro l
switc h (TAL K an d BAC K buttons ) i s disabled .
Voice Contro l Limitation s
Before assumin g tha t a voic e contro l complain t i s hard -
war e related , ensur e tha t th e voic e contro l syste m is be -
in g operate d correctl y (se e "Voic e recognitio n doe s no t
work" , pag e 23-35) .
LCD Displa y Uni t Limitation s
• I n col d temperatures , th e displa y ma y sta y dar k fo r th e
firs t 2 o r 3 minute s unti l i t warm s up .
• Whe n th e displa y i s to o ho t becaus e o f direc t summe r
sunlight , i t wil l remai n dar k unti l th e temperatur e
drops .
• Whe n th e humidit y i s hig h an d th e interio r tempera -
tur e i s low , th e displa y ma y appea r cloudy . Th e dis -
pla y wil l clea r u p afte r som e use .
• Fingerprint s o n th e touc h pane l ma y sometime s b e
noticeabl e becaus e o f th e panel' s low-reflectio n coat -
ing. Whe n cleanin g th e panel , wip e i t gentl y wit h a
sof t cloth . T o avoi d scratchin g th e panel , d o no t ru b
to o hard , o r us e abrasiv e cleaner s o r sho p towels .
• Th e touc h pane l i s a n infrare d system , s o ther e i s n o
nee d t o pres s hard . I f a touc h switc h doe s no t functio n
immediately , shif t you r finge r slightly , an d touc h i t
again .
Note : Inpu t ma y b e affecte d b y direc t sunlight .
Symptom Duplicatio n
• Whe n th e sympto m ca n b e duplicated , follo w th e self -
diagnosti c procedure s an d th e appropriat e trou -
bleshootin g procedures .
• Whe n th e sympto m doe s no t reappea r o r onl y reap -
pear s intermittently , as k th e custome r abou t th e condi -
tion s whe n th e sympto m occured .
-Tr y t o establis h i f outsid e interferenc e ma y hav e
bee n th e cause .
-Tr y t o duplicat e th e sympto m unde r th e sam e condi -
tion s th e custome r wa s experiencing .
-Vibration , temperatur e extremes , an d moistur e (dew ,
humidity ) ar e factor s tha t ar e difficul t t o duplicate .
- Inspec t th e vehicl e fo r after-marke t electroni c device s
(vehicl e locators , amps , rada r detectors , etc) that
ma y b e hidden .
Service Precaution s
• Befor e disconnectin g th e battery , mak e sur e yo u hav e
th e anti-thef t code s fo r th e radi o an d th e navigatio n
system , an d writ e dow n th e frequencie s fo r th e radio' s
prese t buttons .
• Whe n th e batter y i s disconnected , th e interna l GP S
cloc k
is rese t to "0:00" . The cloc k will rese t to th e cor -
rec t tim e afte r th e syste m finishe s GP S initialization .
• Afte r reconnectin g th e battery , yo u hav e t o wai t t o ge t
the initia l signa l fro m th e satellite , whic h ma y tak e fro m
10 to 4 5 minutes . Follo w th e instruction s o n th e screen .
• Afte r reconnectin g th e battery , d o th e powe r windo w
control uni t resettin g procedure .
• Befor e returnin g th e vehicl e t o th e customer , ente r th e
radi o code , the n ente r th e customer' s radi o statio n
presets , an d se t th e clock . D o th e engin e contro l mod -
ul e (PCM ) idl e lear n procedure .
After Servicing-Ma p Matchin g
• Par k th e vehicl e in a n are a wher e th e GP S satellit e sig -
nal s wil l b e unobstructed . Mak e sur e th e GP S indica -
to r o n th e ma p scree n i s green .
• Driv e th e vehicl e 1 mil e befor e enterin g a destinatio n
an d confir m th e roa d bein g use d i s displaye d a t th e
botto m o f th e scree n (ma p matched) .
• Ente r th e deale r addres s an d confir m th e syste m
route s an d perform s normally .
• Clea r an y previou s destination s tha t ma y hav e bee n
entere d fo r testin g purposes .
Obtaining A Navigatio n DV D
If th e navigatio n DV D is los t o r damaged , o r yo u nee d a
yearl y updat e DVD , yo u hav e 2 way s t o purchas e one .
Yo u ca n eithe r cal l (888 ) 549-3798 , o r orde r on-lin e a t
www.Acura.com .
Both method s requir e a credi t card . Th e DV D fo r thi s
mode l ha s a n orang e label , an d canno t b e ordere d
throug h th e part s system . Th e followin g DVD s wil l no t
wor k in thi s navigatio n system :
• Earlie r mode l Acur a Navigatio n DVD s (blac k label )
• Ma p softwar e program s manufacture d b y othe r com -
panie s
• DV D movies , o r DVD s containin g audi o recording s
Updat e DVD s ar e availabl e fo r purchas e usuall y i n th e
fal l o f eac h year . The y ma y contai n th e following :
• Enhance d ma p an d Point s o f interes t (PO D coverag e
• Fixe s fo r mino r softwar e bug s
• Additiona l feature s
Note : Updat e i s o f cours e optional , an d ther e i s n o pro -
gra m to provid e fre e DVD s containin g yearl y mappin g
updates.
ProCarManuals.com

Navigation System

System Description (cont'd)

Overview

The Acura Navigation System is a highly-sophisticated, hybrid locating system that uses satellites and a map database to

show you where you are and to help guide you to a desired destination.

The navigation system receives signals from the Global Positioning System (GPS), a network of 24 satellites in orbit

around the earth. By receiving signals from serveral of these satellites, the navigation system can determine the latitude,

longitude, and elevation of the vehicle. In addition, signals from the system's yaw rate sensor and the PCM (vehicle

speed pulse) enable the system to keep track of the vehicle's direction and speed of travel.

This hybrid system has advantages over a system that is either entirely self-contained or one that relies totally on the

GPS. For example, the self-contained portion of the system can keep track of vehicle position even when satellite signals

cannot be received. When the navigation system is on, the GPS can keep track of the vehicle position even when the vehi-

cle is transported by ferry.

The navigation system applies all this location, direction, and speed information to the maps and calculates a route to the

destination entered. As you drive to that destination, the system provides both visual and audio guidance.

This navigation system also has voice recognition that allows voice control of most of the navigation functions. The TALK

and BACK buttons on the steering wheel activate the voice control.

The illumination signal is used for two purposes. The display unit uses the signal to light up the hard buttons surrounding

the display. In addition the signal is used by the navigation unit to automatically switch from the "Day" to "Night" display

mode when the headlights are on. This automatic switching occurs only if the "Display" setting in setup screen 1 is set to

"AUTO". If the headlights are on and the customer has the dash light brightness control to "full bright," then this overrides

the "Night" mode.

The use of the audio speakers follows a hierarchy. The highest priority is the OnStar voice, followed by the navigation voice,

and finally the radio/CD. The audio unit enforces this hierarchy. The GA-Net bus is used to pass commands to mute the speak-

ers, and to disable the voice control system. Prior systems used dedicated wires to accomplish this function.

• If On-Star is in use, the audio unit passes a command on the GA-Net bus to the navigation unit to disable the voice control

system. The navigation unit then ignores the voice control switch, and temporarily ceases voice route guidance prompts.

• When the navigation system issues route guidance, the navigation unit uses the GA-Net bus to tell the audio unit to mute just

the front speakers. When the voice control system is being used (the TALK/BACK buttons), the navigation unit uses the GA-

Net bus to tell the audio unit to mute all speakers.ProCarManuals.com

System Description (cont'd)

Navigation Function

The navigation system is composed of the navigation unit, the PCM (vehicle speed signal), the GPS antenna, microphone,

steering buttons, audio unit and the display unit.
Navigation SystemProCarManuals.com

Navigation Unit

The navigation unit calculates the vehicle position and guides you to the destination. The unit performs map matching

correction, GPS correction, and distance tuning. It also controls the menu functions and the DVD-ROM drive, and inter-

prets voice commands. With control of all these items, the navigation unit makes the navigation picture signal, then it

transmits the signal to the display unit and audio driving instructions to the audio unit.

Calculation of Vehicle Position

The navigation unit calculates the vehicle position (the driving direction and the current position) by receiving the direc-

tional change signals from the yaw rate sensor and the travel distance signals from the vehicle speed pulse (VSP) sensor.

Map Matching Tuning

The map matching tuning is accomplished by indicating the vehicle position on the roads on the map. The map data

transmitted from the DVD-ROM is checked against the vehicle position data, and the vehicle position is indicated on the

nearest road. Map matching tuning does not occur when the vehicle travels on a road not shown on the map, or when the

vehicle position is far away from a road on the map.

GPS Tuning

The GPS tuning is accomplished by indicating the vehicle position as the GPS's vehicle position. The navigation unit com-

pares its calculated vehicle position data with the GPS vehicle position data. If there is a large difference between the two,

the indicated vehicle position is adjusted to the GPS vehicle position.

Distance Tuning

The distance tuning reduces the difference between the travel distance signal from the VSP and the distance data on the

map. The navigation unit compares its calculated vehicle position data with the GPS vehicle position data. The navigation

unit then decreases the tuning value when the vehicle position is always ahead of the GPS vehicle position, and it increas-

es the tuning value when the vehicle position is always behind the GPS vehicle position.

Route Guidance

The navigation unit can calculate different routes to a selected destination. You have five options:

• Direct Route - Calculate a route that is the most direct and will take the least tome.

• Easy Route - Calcute a route that minimizes the number of turns needed.

• Minimize Freeways - Calculate a route that avoids freeway travel. If that is not possible, keep the amount of freeway

travel to a minimum.

• Minimize Toll Roads - Calculate a route that avoids, or minimizes travel on toll roads.

• Maximize Freeways - Calculate a route that uses freeways as much as possible.

Audio Guidance

The navigation unit transmits audio driving instructions before entering an intersection or passing a junction.

The audio instructions come through the audio unit and the front speakers.

The front speakers are muted whenever the navigation system is giving guidance commands, and all of the speakers

when the voice control system is being used. When using OnStar, both the audio system and the navigation system are

muted, and the voice control switch (TALK and BACK buttons) is disabled.

DVD-ROM

The map data (including all scale rates) is stored in the DVD-ROM. The map date includes:

• Road distances, road widths, speed limits, traffic regulations, passing time at junction, distances to junctions, and the

driving instructions for audio guidance.

• Latitude and longitude GPS.ProCarManuals.com

Glossary

The following is a glossary of terms pertaining to the Voice Recognition Navigation System.

Item

Breadcrumbs

CPU

Database

DCA

DTC

Dead Reckoning

Digitized Road

Disclaimer Screen

DVD or DVD-ROM

ECM

FAQ

GA-Net bus

GPS

HDS

H/U

Initialization

LCD

Map Matching

Mic
Definition

Off road tracking dots that can be followed on the map to retrace your route back to a

mapped (digitized) road. This function can be turned on/off in Setup screen 1.

Central Processing Unit. The main device within the navigation unit that coordinates the

rest of the electronic functions.

This consists of the Map data, and the POI (Points Of Interest) data stored on the DVD.

Detailed Coverage Area. Main metropolitan areas in the Lower 48 states, and Canada are

mapped to this level. See the Navigation Owner's manual for a list of these areas.

Diagnostic Trouble Codes. Use the HDS tablet to obtain, and troubleshoot the cause of

these codes.

The use of the speed signal, and yaw rate sensor to position the vehicle on the map even

when the GPS signal is obscured by tall buildings, or while driving in a tunnel.

A road that appears on the navigation screen. The road name will appear at the bottom of

the navigation screen. If the user drives "off road" the navigation system will display

"Not on a digitized road", and if 1/2 mile, then "breadcrumbs" will appear.

Screen containing cautionary information. It is meant to read carefully and acknowledged

by the customer when using the navigation system.

Digital Versatile Disk. The navigation program and database resides on this disk. See the

Navigation Owner's Manual for information on how to order a replacement or update

DVD.

Engine Control Module. Typically referred to as the PCM

Frequency Asked Question. See the Navigation Owner's Manual for a list of the customer

FAQs, and troubleshooting information

Proprietary communication bus. This serial bus connects the audio unit, navigation unit,

display unit, and XM receiver. Signals passed on this bus include audio muting requests,

navigation and display unit buttons, control commands, and XM control sequences.

Global Positioning System. A network of 24 satellites in orbit around the earth. The navi-

gation system can simultaneously receive signals from up to 12 satellites to accurately

positioning the vehicle on the map.

Honda Diagnostic System. A hand held tablet PC for use in diagnosing vehicle problems.

This device can be used to obtain DTC codes for diagnosis of navigation system CAN

related problems.

Head Unit. The navigation system display unit assembly in the dash.

This refers to the period needed to re-acquire the GPS satellite orbital information when-

ever the navigation system power has been disconnected. This can take from 10 to 45

minutes.

Liquid Crystal Display (the navigation screen)

The received GPS information allows the navigation system to position the vehicle on the

map. Map matching has occurred if the map screen is displaying the current street name

in the bottom-shaded area.

Abbreviation for the microphone used for receiving voice commands. It is located near

the map light in the ceiling

(cont'd)ProCarManuals.com

Item
Verifie d Street s
VP
V R
VS P
VS S
Yaw Senso r
Definitio n
These street s consis t o f th e detaile d metropolita n coverag e areas , an d al l othe r intertow n
connectio n roads . Thes e road s ar e show n i n blac k o n th e map .
Vehicl e Position . Whe n in ma p mode , thi s circula r ico n show s th e vehicl e positio n o n th e
map . Touc h thi s ico n t o sho w th e latitude , longitude , an d elevatio n o f you r curren t posi -
tion.
Voic e Recognition . Thi s allow s voic e contro l o f man y o f th e navigatio n functions . Th e
hardwar e consist s o f th e microphone , steerin g whee l (Talk/Back ) buttons , an d th e fron t
speakers . Se e th e overvie w fo r mor e information .
Vehicle Spee d Pulse . Thi s puls e signa l comin g fro m th e PC M is use d t o updat e th e
Vehicl e positio n o n th e map . Thes e pulse s d o no t indicat e directio n (forwar d o r back -
ward) . Whe n i n reverse , th e navigatio n receive s a signa l fro m th e revers e rela y an d
direct s th e V P to mov e backward s o n th e map .
Vehicl e Spee d Sensor . Thi s senso r read s th e outpu t shaf t spee d a t th e transmissio n and ,
provide s a spee d puls e to th e PCM . Th e PC M send s thi s puls e to th e navigatio n syste m
and speedometer .
This devic e is locate d in th e navigatio n syste m contro l uni t an d sense s th e side-to-sid e
twisting forc e generate d whe n th e vehicl e turns . Se e a detaile d descriptio n o f ho w thi s
senso r work s in thi s manua l (se e pag e 23-17 ).
ProCarManuals.com