Acura RL (1996-2004 year). Manual — part 232

HVAC (Heating, Ventilation and Air Conditioning)

*: Read

SRS precautions

before working in this area

Special Tools

22–2

. . . . . . . . . . . . .

Component Location

Index

22–3

. . . . . . . . . . . . . . . . . .

Wiring/Connector

Locations

22–5

. . . . . . . . . . . . . .

Description

Outline

22–7

. . . . . . . . . . . . . . . .

Fan Control Unit

22–8

. . . . . . .

A/C Pressure Switch

22–9

. . . .

Evaporator Pressure

Regulator (EPR)

22–10

. . . . .

Troubleshooting

Symptom Chart

22–11

. . . . . . . .

Self-diagnosis

Function

22–12

. . . . . . . . . . . .

Climate Control Unit Input/

Output Signals

22–13

. . . . . .

Climate Control Unit

Replacement

22–55

. . . . . . . . . . .

Bulb Replacement

22–55

. . . . . .

Face Panel/Button

Replacement

22–56

. . . . . . . .

Air Mix Control Motor

Replacement

22–57

. . . . . . . . . . .

Test

22–57

. . . . . . . . . . . . . . . . . . .

Mode Control Motor

Test

22–58

. . . . . . . . . . . . . . . . . . .

Replacement

22–58

. . . . . . . . . . .

Recirculation Control Motor

Test

22–59

. . . . . . . . . . . . . . . . . . .

Replacement

22–59

. . . . . . . . . . .

In–car Temperature Sensor

Replacement

22–60

. . . . . . . . . . .

Test

22–60

. . . . . . . . . . . . . . . . . . .

Outside Air Temperature Sensor

Replacement

22–61

. . . . . . . . . . .

Test

22–61

. . . . . . . . . . . . . . . . . . .

Sunlight Sensor

Replacement

22–62

. . . . . . . . . . .

Test

22–62

. . . . . . . . . . . . . . . . . . .

Evaporator Temperature Sensor

Test

22–63

. . . . . . . . . . . . . . . . . . .

Power Transistor Test

22–63

. . . . .

Relays Test

22–64

. . . . . . . . . . . . . . .

Evaporator/Blower Unit

Replacement

22–65

. . . . . . . . . . .

Overhaul

22–67

. . . . . . . . . . . . . .

Dust and Pollen Filters

Replacement

22–68

. . . . . . . . . . .

Heater Unit

*Replacement

22–69

. . . . . . . . . .

Overhaul

22–71

. . . . . . . . . . . . . .

Temperature Control

Adjustment

22–72

. . . . . . . . . . . .

A/C Service Tips

and Precautions

22–73

. . . . . . . .

A/C System Torque

Specifications

22–74

. . . . . . . . . .

A/C System Service

Refrigerant Recovery

22–75

. . .

Performance Test

22–76

. . . . . .

Pressure Test Chart

22–78

. . . .

Evacuation

22–88

. . . . . . . . . . . .

Charging

22–89

. . . . . . . . . . . . . .

Leak Test

22–89

. . . . . . . . . . . . . .

Compressor

Replacement

22–79

. . . . . . . . . . .

Component Location

Index

22–81

. . . . . . . . . . . . . . .

Clutch Inspection

22–82

. . . . . .

Clutch Overhaul

22–83

. . . . . . . .

Relief Valve

Replacement

22–84

. . . . . . . .

A/C Compressor Belt

Adjustment

22–85

. . . . . . . . . . . .

Condenser

Replacement

22–86

. . . . . . . . . . .

Main Menu

Body Electrical

*: Read

SRS precautions

before working in this area

Special Tools

23–2

. . . . . . . . . . . . . . . . .

Troubleshooting

Tips and Precautions

23–3

. . . . . . .

Five-step Troubleshooting

23–5

. .

Relay and Control Unit Locations

Engine Compartment

’96–01 Models

23–6

. . . . . . . . . .

’02–04 Models

23–2a

. . . . . . . . . .

Dashboard

23–8

. . . . . . . . . . . . . . . .

Door, Floor, Roof and Rear

Bulkhead

23–10

. . . . . . . . . . . . . . .

Under–dash Fuse/Relay Box

Removal/Installation

23–66

. . . . . . . .

Power Relays Test

23–67

. . . . . . . . . . . . .

* Ignition Switch

Test

23–70

. . . . . . . . . . . . . . . . . . . . . . .

Electrical Switch

Replacement

23–71

. . . . . . . . . . .

Battery Test

23–72

. . . . . . . . . . . . . . . . . . .

Gauge Assembly

Component Location

Index

23–74

. . . . . . . . . . . . . . . . . .

Gauge/Terminal Location Index

’96–03 Models

23–75

. . . . . . . . . .

’04 Model

23–27c

. . . . . . . . . . . . . . .

Bulb Locations

23–76

. . . . . . . . . . . .

Maintenance Reminder

Light

23–76

. . . . . . . . . . . . . . . . . . .

Select/Reset Switch Test

23–84

. . . .

Outside Air Temperature Indicator

Troubleshooting

23–84

. . . . . . . .

Calibration

23–84

. . . . . . . . . . . . .

Replacement

23–85

. . . . . . . . . . . . . .

Vehicle Speed Sensor (VSS)

Replacement

23–85

. . . . . . . . . . .

Troubleshooting

23–86

. . . . . . . .

Safety Indicator

Component Location Index

23–88

.

Indicator Input Test

23–94

. . . . . . . . .

Brake Light Failure Sensor

Test

23–96

. . . . . . . . . . . . . . . . . . . .

Lighting System

Component Location

Index

23–98

. . . . . . . . . . . . . . . . . .

Automatic Lighting Control Unit

Input Test (USA)

23–114

. . . . . . . .

Daytime Running Lights Control

Unit Input Test
(Canada)

23–116

. . . . . . . . . . . . . . .

Combination Light Switch

Test

23–118

. . . . . . . . . . . . . . . . . . . .

Replacement

23–121

. . . . . . . . . . .

HID Lamp System Troubleshooting

’99–04 Models

23–120

. . . . . . . . . .

Headlights

Replacement

23–121

. . . . . . . . . . .

HID Bulb Removal

’99–04 Models

23–122

. . . . . . .

Adjustment

’96–98 Models

23–123

. . . . . . .

’99–04 Models

23–124

. . . . . . .

Taillights

Replacement

23–125

. . . . . . . . . . .

Fog lights

Switch Test

23–126

. . . . . . . . . . . . .

Adjustment

23–127

. . . . . . . . . . . . .

Replacement

23–127

. . . . . . . . . . .

License Plate Light

Replacement

23–128

. . . . . . . . . . .

High Mount Brake Light

Replacement

23–131

. . . . . . . . . . .

Turn Signal/Hazard Flasher System

Component Location

Index

23–132

. . . . . . . . . . . . . . . . . .

Turn Signal/Hazard Relay

Input Test

23–134

. . . . . . . . . . . . . .

Hazard Warning Switch

Test

23–135

. . . . . . . . . . . . . . . . . . . .

Interior Lights

Component Location

Index

23–136

. . . . . . . . . . . . . . . . . .

Trunk Light Test

23–139

. . . . . . . . . . . .

Glove Box Light Test

23–139

. . . . . . .

Vanity Mirrror Light Test

23–140

. . . .

Clock

Removal

23–141

. . . . . . . . . . . . . . . . . . .

Terminals

23–141

. . . . . . . . . . . . . . . . . .

Stereo Sound System

*Component Location Index

’96–03 Models

23–142

. . . . . . . . . .

’04 Model

23–35c

. . . . . . . . . . . . . . .

Stereo Amplifier Terminals

(with Bose Sound System)
’96–03 Models

23–143

. . . . . . . . . .

’04 Model

23–36c

. . . . . . . . . . . . . . .

Audio Unit Terminals

’96–01 Models

23–144

. . . . . . . . . .

’02–03 Models

23–50a

. . . . . . . . . .

’04 Model

23–37c

. . . . . . . . . . . . . . .

*Audio Unit Removal

23–150

. . . . . . .

CD Changer Removal

23–152

. . . . . . .

Stereo Amplifier Removal

23–152

. . .

Speaker Replacement

23–153

. . . . . .

Radio Remote Switch Test

23–154

. .

Window Antenna Wire

Test/Repair

23–155

. . . . . . . . . . . . .

XM Radio (’04 Model)

Receiver Terminals

23–38c

. . . . . .

Antenna Terminals

23–42c

. . . . . .

Accessory Power Socket

Replacement

23–156

. . . . . . . . . . . . . .

Cigarette Lighter

Replacement

23–157

. . . . . . . . . . . . . .

Horns

*Component Location

Index

23–158

. . . . . . . . . . . . . . . . . .

Horn Test

23–161

. . . . . . . . . . . . . . . . . .

Switch Test

23–162

. . . . . . . . . . . . . . . .

Seat Belt Tension Reducer

Test

23–166

. . . . . . . . . . . . . . . . . . . . . . .

Moonroof

Component Location

Index

23–167

. . . . . . . . . . . . . . . . . .

Control Unit Input Test

23–169

. . . . .

Motor Test

23–172

. . . . . . . . . . . . . . . . .

Switch Test

23–173

. . . . . . . . . . . . . . . .

Seat Heaters

Component Location

Index

23–174

. . . . . . . . . . . . . . . . . .

System Description

23–174

. . . . . . . .

Switch Test/Replacement

23–176

. . .

Heater Test

23–176

. . . . . . . . . . . . . . . .

Automatic Inside Dimming Mirror

Component Location

Index

23–177

. . . . . . . . . . . . . . . . . .

Description

’96–01 Models

23–177

. . . . . . . . . .

’02–04 Models

23–45a

. . . . . . . . . .

Test/Replacement

’96–01 Models

23–178

. . . . . . . . . .

’02–04 Models

23–47a

. . . . . . . . . .

Front Passenger’s Power Seat

Component Location

Index

23–179

. . . . . . . . . . . . . . . . . .

Switch Test/Replacement

23–181

. . .

Motor Test

23–181

. . . . . . . . . . . . . . . . .

Immobilizer System

Component Location

Index

23–182

. . . . . . . . . . . . . . . . . .

Description

23–183

. . . . . . . . . . . . . . . .

Problems and Replacement

Parts

23–185

. . . . . . . . . . . . . . . . . . .

Control Unit Input Test

23–187

. . . . .

Immobilizer Receiver and

Transponder Test

23–188

. . . . . . .

Immobilizer Receiver

Replacement

23–189

. . . . . . . . . . .

Driving Position Memory System (DPMS)

Component Location

Index

23–190

. . . . . . . . . . . . . . . . . .

Description

23–192

. . . . . . . . . . . . . . . .

Self Diagnostic

Procedures

23–200

. . . . . . . . . . . . .

DTC Chart

23–201

. . . . . . . . . . . . . . . . .

Troubleshooting Guide

23–202

. . . . .

Pre–troubleshooting Tests

23–204

. .

Driving Position Memory

Switch Test

23–225

. . . . . . . . . . . . .

Steering Column

Switch Test

23–225

. . . . . . . . . . . . .

Tilt/Extend–retract

Motor Test

23–226

. . . . . . . . . . . . . .

Tilt/Extend–retract Position

Sensor Test

23–226

. . . . . . . . . . . .

Driver’s Power Seat Switch

Test

23–227

. . . . . . . . . . . . . . . . . . . .

Driver’s Power Seat Motor

Test

23–228

. . . . . . . . . . . . . . . . . . . .

Driver’s Power Seat Position

Sensor Test

23–229

. . . . . . . . . . . .

Steering Column Control Unit

Input Test

23–230

. . . . . . . . . . . . . .

Power Seat Control Unit

Input Test

23–234

. . . . . . . . . . . . . .

Power Mirror Control Unit

Input Test

23–238

. . . . . . . . . . . . . .

Multiplex Control System

Component Locations

23–241

. . . . . .

System Description

23–241

. . . . . . . .

System Functions

23–243

. . . . . . . . . .

Multiplex Communication

System

23–243

. . . . . . . . . . . . . . . . .

Troubleshooting Guide

23–244

. . . . .

Power and Ground Test

23–245

. . . . .

Self Diagnosis Function

(Mode 1)

23–248

. . . . . . . . . . . . . . .

Wake–up Function Test

23–249

. . . . .

Confirming the Function

23–250

. . . .

Faulty Wake–up Line

Symptoms

23–251

. . . . . . . . . . . . . .

Check the Wake–up

Function

23–251

. . . . . . . . . . . . . . .

Self Diagnosis Function

(Mode 2)

23–252

. . . . . . . . . . . . . . .

Integrated Control

Ignition Key Light

Replacement

23–254

. . . . . . . . . . .

Main Menu

Body Electrical (Cont’d)

Dash Lights Brightness Control

Controller Test/

Replacement

23–256

. . . . . . . . . . .

Entry Light Control System

Component Location

Index

23–257

. . . . . . . . . . . . . . . . . .

Control Unit Input Test

23–259

. . . . .

Front Ceiling Light Test

23–262

. . . . .

Rear Ceiling Light Test

23–262

. . . . .

Courtesy Light

Replacement

23–263

. . . . . . . . . . .

Ignition Key Switch Test

23–263

. . . .

Door Switch Test

23–264

. . . . . . . . . . .

Rear Window Defogger

*Component Location

Index

23–265

. . . . . . . . . . . . . . . . . .

Control Unit Input Test

23–267

. . . . .

Door Switch Test

23–269

. . . . . . . . . . .

Defogger Coil Test

23–269

. . . . . . . . .

Function Test

23–270

. . . . . . . . . . . . . .

Defogger Wire Repair

23–270

. . . . . . .

Trunk Lid Opener

Component Location

Index

23–271

. . . . . . . . . . . . . . . . . .

Control Unit Input Test

23–273

. . . . .

Main Switch Test

23–274

. . . . . . . . . . .

Switch Test

23–274

. . . . . . . . . . . . . . . .

Solenoid Test

23–275

. . . . . . . . . . . . . .

Power Door Locks

Component Location

Index
’96–01 Models

23–276

. . . . . . . . . .

’02–04 Models

23–26a

. . . . . . . . . .

Transmitter Test

’96–01 Models

23–282

. . . . . . . . . .

’02–04 Models

23–34a

. . . . . . . . . .

Troubleshooting

23–283

. . . . . . . . . . .

Control Unit Input Test

23–284

. . . . .

Keyless Receiver Unit Input Test

’96–01 Models

23–290

. . . . . . . . . .

’02–04 Models

23–32a

. . . . . . . . . .

Keyless Transmitter Codes

Input Procedure
’96–01 Models

23–292

. . . . . . . . . .

’02–04 Models

23–34a

. . . . . . . . . .

Driver’s Door Lock Actuator

Test

23–293

. . . . . . . . . . . . . . . . . . . .

Front Passenger’s Door Lock

Actuator Test

23–293

. . . . . . . . . . .

Rear Door Lock Actuator

Test

23–294

. . . . . . . . . . . . . . . . . . . .

Driver’s Door Key Cylinder

Switch Test

23–295

. . . . . . . . . . . . .

Door Lock Switch Test

23–295

. . . . . .

Power Windows

Component Location

Index

23–296

. . . . . . . . . . . . . . . . . .

Description

’96–01 Models

23–297

. . . . . . . . . .

’02–04 Model

23–40a

. . . . . . . . . . .

Troubleshooting

23–310

. . . . . . . . . . .

Control Unit Input Test

’96–01 Models

23–311

. . . . . . . . . .

’02–04 Model

23–42a

. . . . . . . . . . .

Master Switch

Replacement

23–316

. . . . . . . . . . .

Passenger’s Window

Switch Replacement

23–316

. . . .

Passenger’s Window

Switch Test

23–317

. . . . . . . . . . . . .

Passenger’s Window

Motor Test

23–317

. . . . . . . . . . . . . .

Driver’s Window Motor Test

’96–01 Models

23–318

. . . . . . . . . .

’02–04 Models

23–41a

. . . . . . . . . .

Driver’s Window Switch Test

’02–04 Models

23–44a

. . . . . . . . . .

Wiper/Washers

Component Location

Index

23–319

. . . . . . . . . . . . . . . . . .

Troubleshooting

23–324

. . . . . . . . . . .

Control Unit Input Test

23–325

. . . . .

Wiper/Washer Switch

Test

23–327

. . . . . . . . . . . . . . . . . . . .

Windshield Wiper Motor

Test

23–328

. . . . . . . . . . . . . . . . . . . .

Washer Motor Test

23–328

. . . . . . . . .

Switch Replacement

23–329

. . . . . . . .

Security Alarm System

Component Location

Index

23–330

. . . . . . . . . . . . . . . . . .

Description

23–332

. . . . . . . . . . . . . . . .

Control Unit Input Test

23–346

. . . . .

Indicator Replacement

23–352

. . . . . .

Hood Switch Test

23–352

. . . . . . . . . .

Trunk Lid Latch Switch

Test

23–353

. . . . . . . . . . . . . . . . . . . .

Trunk Key Cylinder Switch

Test

23–353

. . . . . . . . . . . . . . . . . . . .

Power Mirrors

Component Location

Index

23–354

. . . . . . . . . . . . . . . . . .

Function Test

(without memory)

23–357

. . . . . . .

Switch Test

23–358

. . . . . . . . . . . . . . . .

Power Mirror Test

23–359

. . . . . . . . . .

Power Mirror Actuator

Replacement

23–360

. . . . . . . . . . .

Homelink Remote Control System

Test

23–361

. . . . . . . . . . . . . . . . . . . . . .

Navigation System

Special Tools

23–364

. . . . . . . . . . . . . .

Component Location Index

’96–03 Models

23–365

. . . . . . . . . .

’04 Model

23–3d

. . . . . . . . . . . . . . .

Description (’96–’03 Models)

Overview

23–366

. . . . . . . . . . . . . . .

Navigation Function

23–367

. . . . .

Description (’04 Model)

Overview

23–14d

. . . . . . . . . . . . . . .

Navigation Function

23–16d

. . . . .

General Troubleshooting

Information (’04 Model)

23–4d

. .

Control Unit Terminal Arrangement

’96–99 Models

23–376

. . . . . . . . . .

’00–03 Models

23–379

. . . . . . . . . .

’04 Model

23–7d

. . . . . . . . . . . . . . .

Troubleshooting

Precautions

23–383

. . . . . . . . . . . .

Troubleshooting Guide

’96–03 Models

23–385

. . . . . . . . . .

’04 Model

23–6d

. . . . . . . . . . . . . . .

System Diagnosis Mode

(’04 Model)

23–40d

. . . . . . . . . . . . .

Picture Diagnosis

’96–99 Models

23–386

. . . . . . . . . .

’00–03 Models

23–392

. . . . . . . . . .

Forced Starting of Display

’96–03 Models

23–412

. . . . . . . . . .

’04 Model

23–52d

. . . . . . . . . . . . . . .

Hard Disc (’96–99 Models)

Replacement

23–413

. . . . . . . . . . .

DVD–ROM Replacement

’00–03 Models

23–413

. . . . . . . . . .

’04 Model

23–52d

. . . . . . . . . . . . . . .

Navigation Unit/GPS Antenna

Removal/Installation
’96–03 Models

23–414

. . . . . . . . . .

’04 Model

23–53d

. . . . . . . . . . . . . . .

Display Unit Removal/Installation

’96–03 Models

23–415

. . . . . . . . . .

’04 Model

23–54d

. . . . . . . . . . . . . . .

Clock Display Size and Location

Adjustment
(’00–03 models only)

23–417

. . . .

Voice Control Switch

Removal/Installation

23–54d

. . . .

OnStar System (’02–04 Models)

Component Location Index

’02–03 Models

23–52a

. . . . . . . . . .

’04 Model

23–43c

. . . . . . . . . . . . . . .

Description

23–53a

. . . . . . . . . . . . . . . .

Troubleshooting

23–58a

. . . . . . . . . . .

Control Unit Input Test

23–59a

. . . . .

Interface Unit Input Test

’02–03 Models

23–62a

. . . . . . . . . .

’04 Model

23–46c

. . . . . . . . . . . . . . .

Radio Frequency Modulator

Input Test

23–64a

. . . . . . . . . . . . . .

Buttons and Microphone Input Test

’02–03 Models

23–66a

. . . . . . . . . .

’04 Model

23–48c

. . . . . . . . . . . . . . .

Cellular Phone Antenna Replacement

’02–03 Models

23–67a

. . . . . . . . . .

’04 Model

23–49c

. . . . . . . . . . . . . . .

Lumbar Support System (’04 Model)

Component Location

Index

23–50c

. . . . . . . . . . . . . . . . . .

Switch Test

23–52c

. . . . . . . . . . . . . . . .

Motor Test

23–52c

. . . . . . . . . . . . . . . . .

Main Menu

Restraints

Seat Belts

Component Location Index

24–2

. . . .

Front Seat Belt Removal/

Installation

24–3

. . . . . . . . . . . . . . . .

Rear Seat Belt Removal/

Installation

24–5

. . . . . . . . . . . . . . . .

Seat Belt Inspection

24–8

. . . . . . . . . . .

Child Seat Tether Anchor Installation

’96–99 models

24–9

. . . . . . . . . . . . .

Child Seat Tether Anchor Removal/

Installation
’00–04 models

24–10

. . . . . . . . . . . . .

Supplemental Restraint System (SRS)

Special Tools

24–13

. . . . . . . . . . . . . . . . .

Component/Wiring Location Index

’96–98 models

24–14

. . . . . . . . . . . . .

’99–04 models

24–15

. . . . . . . . . . . . .

Description

SRS Airbag System

’96–98 models

24–16

. . . . . . . . . .

’99–04 models

24–17

. . . . . . . . . .

Precautions/Procedures

General Precautions

24–26

. . . . . . . .

Airbag Handling and

Storage

24–26

. . . . . . . . . . . . . . . .

Seat Belt Tensioner Handling

and Storage

24–27

. . . . . . . . . . . .

SRS Unit (’96–04 models) and

Side Impact Sensor
(’99–04 models)

24–27

. . . . . . . . .

Inspection After

Deployment

24–28

. . . . . . . . . . . .

Disconnecting the SRS Connector

at the Fuse Box
(’96–98 models)

24–28

. . . . . . . . .

Wiring Precautions

24–28

. . . . . . . . .

Spring–loaded Lock

Connectors

24–29

. . . . . . . . . . . . .

Spring–loaded Lock Connectors

with Built–in
Short Contact

24–30

. . . . . . . . . . .

Seats with Side Airbags

(’99–04 models)

24–30

. . . . . . . . .

Backprobing Spring–loaded

Lock Connectors

24–31

. . . . . . .

Disconnecting the Airbag

Connectors and Seat Belt
Tensioner Connectors
(’96–98 models)

24–31

. . . . . . . . .

Disconnecting the Airbag

Connectors, Side Airbag
Connectors, and Seat Belt
Tensioner Connectors
(’99–04 models)

24–32

. . . . . . . . .

Steering–related

Precautions

24–34

. . . . . . . . . . . .

Troubleshooting

Self–diagnostic Procedures

’96–98 Models

24–35

. . . . . . . . . .

’99–04 Models

24–84

. . . . . . . . . .

Reading the DTC

’96–98 Models

24–35

. . . . . . . . . .

’99–04 Models

24–84

. . . . . . . . . .

Erasing the DTC Memory

’96–98 Models

24–37

. . . . . . . . . .

’99–04 Models

24–87

. . . . . . . . . .

Troubleshooting Intermittent

Failures
’96–98 Models

24–37

. . . . . . . . . .

’99–04 Models

24–87

. . . . . . . . . .

Initializing the OPDS

(Occupant Position Detection
System) Unit
’99–04 Models

24–88

. . . . . . . . . .

DTC Chart

’96–98 Models

24–38

. . . . . . . . . .

’99–04 Models

24–89

. . . . . . . . . .

SRS Indicator Light Wire Connections

’96–’98 Models

24–40

. . . . . . . . . . . . .

Fuse Box and Connector Locations

’99–04 Models

24–92

. . . . . . . . . . . . .

Airbag Replacement

24–160

. . . . . . . . . . .

Side Airbag Replacement

24–164

. . . . . .

Seat Belt Tensioner

Replacement

24–165

. . . . . . . . . . . . . .

Airbag and Seat Belt Tensioner

Disposal
’96–98 Models

24–168

. . . . . . . . . . . . .

’99–04 Models

24–172

. . . . . . . . . . . . .

Cable Reel Replacement

24–176

. . . . . . .

SRS Unit Replacement

24–181

. . . . . . . . .

Side Impact Sensor

Replacement

24–183

. . . . . . . . . . . . . .

Main Menu