Vehicle Market Segment:
Full-size luxury sedan
Key Competitors:
BMW 7 Series, Mercedes-Benz S-Class, Audi A8, Lexus LS.
Vehicle Design Philosophy:
Focus on elegant styling, refined ride quality, and luxurious interior appointments characteristic of British automotive tradition.
Manual Purpose:
To provide comprehensive electrical system diagnostics and repair information for Jaguar XJ Series (X308) 1999 models, enabling accurate fault finding and component repair.
Systems Covered:
Full Electrical System, Engine Control Systems, Transmission Control Systems, Body Electrical Systems, Chassis Electrical Systems, HVAC Electrical, Lighting, Instrumentation, Audio Systems, Security Systems, Powertrain Management, Diagnostic Procedures, Wiring Diagrams.
Manual Type:
Electrical Guide
Engine Management Electrical:
Detailed diagnostics and wiring for Engine Control Module (ECM), fuel injection, ignition system, sensors (MAF, O2, CKP, CMP, TPS, ECT), actuators (injectors, coils, idle air control valve), emissions control systems.
Transmission Control Electrical:
Wiring and troubleshooting for the ZF 5HP24 5-speed automatic transmission control module, sensors, and solenoids.
Body Electrical Systems:
Power windows, mirrors, seats, central locking, sunroof, wipers, washers, interior/exterior lighting, door modules, keyless entry, alarm system, convenience features.
Chassis Electrical Systems:
ABS, Traction Control System (TCS), Cruise Control, instrument cluster, diagnostic port (OBD-II).
HVAC Electrical:
Climate control module, blower motor, temperature sensors, actuators, recirculation flap.
Lighting Systems:
Headlights (low/high beam), taillights, brake lights, turn signals, fog lights, interior lighting, bulb types and locations.
Audio And Infotainment:
Factory radio, CD player, amplifier, speaker wiring, antenna system.
Troubleshooting Guides:
Systematic troubleshooting flowcharts and diagnostic symptom-to-cause tables for common electrical faults.
Wiring Diagrams:
Comprehensive and detailed color-coded wiring diagrams for all electrical systems, including harness routing and component locations.
Component Testing:
Resistance, voltage, and continuity testing procedures for key electrical components.
Fuse And Relay Identification:
Detailed diagrams and locations for all fuse boxes and relays, including circuit protection specifications.
Diagnostic Trouble Codes:
Explanation and interpretation of OBD-II diagnostic trouble codes (DTCs) relevant to the electrical system.
Depth Of Coverage:
Advanced diagnostics, component-level troubleshooting, and detailed wiring analysis. Suitable for professional technicians and advanced DIY enthusiasts.
Transmission Type Std:
5-speed Automatic (ZF 5HP24)
Transmission Type Opt:
N/A (Automatc was standard across all trims for 1999)
Transmission Features:
Adaptive shift logic, 'Sport' and 'Winter' modes.
Transmission Fluid Type:
ZF LifeguardFluid 5 (or equivalent like Castrol Transmax Z/Dexron III)
Transmission Fluid Capacity:
Approx. 9.0 Liters (Pan Drop and Filter Change)
NHTSA Rating:
Not specifically rated by NHTSA for this year/model in available records. General safety systems in place.
ABS:
Standard Anti-lock Braking System (ABS)
Traction Control:
Standard Traction Control System (TCS)
Airbags:
Driver and front passenger airbags, optional side airbags.
Seatbelts:
Three-point inertia-reel seatbelts with pretensioners.
Chassis Construction:
Reinforced safety cell, crumple zones.
Audio System Features:
Premium sound system options with CD changer capability. Manual covers wiring and troubleshooting for audio components.
Cruise Control System:
Electronic cruise control system, managed by the ECM. Manual details its electrical operation.
Diagnostic Port:
OBD-II compliant diagnostic port, typically located under the dashboard for engine and transmission diagnostics.
Central Locking System:
Remote central locking and keyless entry. Manual details the modules and wiring.
Oil Change Interval:
Every 10,000 miles or 12 months, whichever comes first (using synthetic oil).
Transmission Fluid Interval:
Recommended every 60,000 miles or 4 years, but often considered 'lifetime' by some manufacturers. Regular inspection recommended.
Coolant Flush Interval:
Every 50,000 miles or 5 years.
Engine Oil Type:
API SJ or SL, SAE 5W-30 Synthetic
Engine Oil Capacity:
Approx. 6.7 Liters (with filter change)
Coolant Type:
Jaguar Premium Coolant (Ethylene Glycol based, OAT)
Brake Fluid Type:
DOT 3 or DOT 4
Engine Coil Packs:
Prevalent issues with coil-on-plug ignition coils leading to misfires. The manual details testing procedures.
Tensioners On Early V8S:
While less common on the 1999 models compared to earlier AJ-V8s, the plastic timing chain tensioners were a known failure point in the X308 generation. This manual's electrical focus would cover related sensor faults.
Window Regulators:
Electric window regulators can fail, impacting power window operation. Electrical diagnostics are key.
ABS Sensor Faults:
Failures of ABS wheel speed sensors can trigger ABS/TCS warning lights. Manual provides wiring and testing for these.
Transmission Leaks:
Potential leaks from transmission cooler lines or pan gasket. This manual covers the electrical control aspects of the transmission.
Jaguar Legacy:
Jaguar Cars has a long history of producing luxury, performance, and sporting vehicles, known for their elegant design and engineering.
Xj Evolution:
The XJ Series represents Jaguar's flagship luxury sedan, with the X308 generation being an evolution of the X300 platform, introducing the AJ-V8 engine and a refreshed interior and exterior styling.
Production Period:
1994-2003 (X308 Generation)
Manufacturer:
Jaguar Cars (part of Ford Motor Company at the time)
Manufacturing Location:
Coventry, England
