Climate Control - Jaguar Repair Information Resource

[Pages:66]Service Training Course No. 701

Climate Control

This publication is intended for instructional purposes only. Always refer to the appropriate Jaguar Service publication for specific details and procedures.

WARNING: WHILE SERVICING AND TESTING VEHICLES AND VEHICLE SYSTEMS, TAKE ALL

NECESSARY SAFETY PRECAUTIONS TO PREVENT THE POSSIBILITY OF BODILY INJURY OR DEATH. Publication T 701/98 ? 1998 Jaguar Cars Date of Issue: 07/98 PRINTED IN USA

All rights reserved. All material contained herein is based on the latest information available at the time of publication. The right is reserved to make changes at any time without notice.

Introduction

Jaguar Climate Control Systems provide vehicle occupants with year-round automatic temperature and humidity control as selected on the control panel. The vehicle heating and air-conditioning systems are the foundation for providing the warm, cool or combined warm/cool air necessary to meet the desired conditions. Using advanced electronic components and a microprocessor-based control module, the Climate Control Systems produce a continuously comfortable environment over a wide range of ambient conditions.

CLIMATE CONTROL SYSTEMS INTEGRATION

CLIMATE CONTROL

ENGINE COOLANT

A/C SYSTEM

CONTROL VALVE

A/C CONTROLS

HEATER MATRIX

WARM AIR

CLIMATE CONTROL

EVAPORATOR MATRIX

COOL / DRY AIR

AS REQUIRED:

HEATING

COOLING

WARM / COOL BLEND

CLIMATE CONTROL

T701/0.01

Denso Climate Control System

Contents Overview System Logic Component Location Control Module Climate Control Panel Air Conditioning / Refrigeration System Heating System Air Conditioning / Heater Unit Temperature Control Sensors Vehicle Systems Interfaces Control Panel Diagnostics DTC Summary

3 4?7 8?9 10 ? 13 14 ? 17 18 ? 37 38 ? 41 42 ? 50 51 ? 53 54 ? 57 58 ? 59 61 ? 64

1

Denso Climate Control System

Overview

The Jaguar Denso Climate Control System, introduced in the 1995 Model Year Sedan Range, is standard equipment in all current production Jaguars. The system is controlled through a microprocessor-based electronic control module and a microprocessor-based control panel. The system produces the driver selected comfort level by controlling air flow volume and distribution using cooling from the air conditioning system and heat from the engine cooling system. To control cabin temperature, the system uses a heater valve to regulate the heater matrix temperature. The Denso system differs from previous Jaguar systems that controlled cabin temperature with flaps in the air conditioning heater unit to blend cooled air with the heated air from an unregulated heater matrix. The windshield, rear window, and mirror heater circuits are integral with the Denso climate control system.

SEDAN RANGE CLIMATE CONTROL AIR FLOW (1997 MY SHOWN)

Diagnostic trouble codes (DTCs) and a panel display warn of system faults. In the case of most faults, a default value is substituted for the faulty signal allowing the climate control system to continue to function. Both the DTC and the panel display fault code information is supplied in this textbook with the description of each applicable component. A summary of DTCs and possible causes can be found on pages 61 ? 64.

The climate control systems fitted to AJ16, V12 and AJV8 engine Sedan Range and XK8 vehicles operate in a similar fashion and share most components. Important differences between the systems are outlined in this book.

XK8 CLIMATE CONTROL AIR FLOW

T701/4.01

PLEASE NOTE: FOR AID IN UNDERSTANDING THE CLIMATE CONTROL SYSTEM, REFER

TO THE APPLICABLE JAGUAR ELECTRICAL GUIDE FOR ELECTRICAL CIRCUIT DETAILS, COMPONENT INFORMATION, AND PIN-OUT DATA.

T701/4.02

3

Denso Climate Control System

System Logic

AJ16 AND V12 CONTROL MODULE INPUTS / OUTPUTS

CONTROL PANEL AMBIENT TEMPERATURE SENSOR

SERIAL COMMUNICATIONS DATA LINK OUTSIDE TEMPERATURE

SOLAR SENSOR

SOLAR LOAD

IN-CAR TEMPERATURE SENSOR EVAPORATOR TEMPERATURE SENSOR HEATER MATRIX TEMPERATURE SENSOR

INSTRUMENT PACK

REFRIGERANT PRESSURE SWITCH WINDSHIELD HEATERS

IN-CAR TEMPERATURE EVAPORATOR TEMP.

HEATER MATRIX TEMP.

ENGINE TEMPERATURE VEHICLE SPEED

COMPRESSOR ON/OFF

SYSTEM CONTROL

HEATER ON/OFF

HEATED BACKLIGHT MIRROR HEATERS

HEATER ON/OFF

WINDSHIELD HEATER RELAYS

HEATER ON/OFF

REAR WINDOW HEATER RELAY

HEATERS ON/OFF

MIRROR HEATER RELAY

SERIAL COMMUNICATIONS DATA LINK

PDU

A/C CONTROL MODULE

T701/4.03A

4

Denso Climate Control System

FLAP POSITION

LEFT FRESH/RECIRC FLAP SERVO DRIVE BLOWER SPEED BLOWER CONTROL

FEEDBACK POTENTIOMETER LEFT FRESH/RECIRC FLAP

POWER TRANSISTOR

BLOWER HIGH SPEED

FLAP POSITION

LEFT BLOWER HIGH SPEED RELAY

RIGHT FRESH/RECIRC FLAP SERVO DRIVE BLOWER SPEED BLOWER CONTROL

LEFT BLOWER

FEEDBACK POTENTIOMETER RIGHT FRESH/RECIRC FLAP

POWER TRANSISTOR

BLOWER HIGH SPEED

RIGHT BLOWER

SYSTEM CONTROL

A/C HEATER PUMP ON/OFF

RIGHT BLOWER HIGH SPEED RELAY

HEATER PUMP

HEATER VALVE CONTROL FLAP POSITION

COOL AIR BYPASS FLAP SERVO DRIVE

HEATER PUMP RELAY

FEEDBACK POTENTIOMETER

HEATER VALVE COOL AIR BYPASS FLAP

FLAP POSITION FACE VENT FLAP SERVO DRIVE

FEEDBACK POTENTIOMETER

FACE VENT FLAP

FLAP POSITION DEFROST FLAP SERVO DRIVE

FEEDBACK POTENTIOMETER

DEFROST FLAP

FLAP POSITION

FOOT FLAP SERVO DRIVE

FEEDBACK POTENTIOMETER

FOOT FLAP

ELECTRICAL LOAD LOAD INHIBIT (V12) ENGINE SPEED ENGINE LOAD

COMPRESSOR CLUTCH CONTROL

COMPRESSOR ON/ OFF

COMPRESSOR REQUEST

COMPRESSOR ON

ENGINE CONTROL MODULE

COMPRESSOR CLUTCH RELAY

COMPRESSOR CLUTCH

LOCK SENSOR (V12 ONLY)

COMPRESSOR SPEED (V12 ONLY) A/C CONTROL MODULE

T701/4.03B

5

Denso Climate Control System

System Logic

AJV8 CONTROL MODULE INPUTS / OUTPUTS

CONTROL PANEL AMBIENT TEMPERATURE SENSOR

SERIAL COMMUNICATIONS DATA LINK OUTSIDE TEMPERATURE

SOLAR SENSOR

SOLAR LOAD

IN-CAR TEMPERATURE SENSOR EVAPORATOR TEMPERATURE SENSOR HEATER MATRIX TEMPERATURE SENSOR

INSTRUMENT PACK

IN-CAR TEMPERATURE EVAPORATOR TEMP.

HEATER MATRIX TEMP.

ENGINE TEMPERATURE VEHICLE SPEED ENGINE SPEED

SYSTEM CONTROL

WINDSHIELD HEATERS

HEATER ON/OFF

HEATED BACKLIGHT MIRROR HEATERS

HEATER ON/OFF

WINDSHIELD HEATER RELAYS

HEATER ON/OFF

REAR WINDOW HEATER RELAY

HEATERS ON/OFF

MIRROR HEATER RELAY

SERIAL COMMUNICATIONS DATA LINK

PDU

A/C CONTROL MODULE

T701/4.04A

6

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

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download