Isuzu Elf N-Series 1999–2001 Workshop Manual Set (P/N LGGEN-WE-9991)

The general-information volumes provide maintenance schedules, lubrication guidance, and workshop conventions; the system manuals cover diagnosis and component repair. The ABS electrical supplement is used with the ABS workshop manual and the applicable cab-and-chassis electrical volume.

Application limits: These publications cover vehicles outside the USA and Canada, with a separate European maintenance version. Match the model code, engine, transmission, and steering position to the relevant volume. Chassis coverage does not imply that every engine configuration has a dedicated overhaul manual in this set.

PDF Search, Bookmarks, and File Contents

Search and diagram detail: Text search is available in the ABS manual, ABS electrical supplement, 4J engine manual, both general-information volumes, and PTO manual. The 4H engine PDF is only partly searchable; the other eleven PDFs do not provide usable text search. Embedded bookmarks provide section navigation. Small wiring labels require zooming.

The ZIP contains 18 printable PDFs totaling 3,621 pages. This total includes the original covers and publication pages, plus 35 memo pages distributed through the manuals.

Engine, Driveline, Brake, and Chassis Workshop Coverage

The following selected contents outline the main workshop areas rather than reproduce every contents page. Further topics include maintenance schedules for severe operating conditions and crew-cab body-panel sealing.

• Diesel engines: Step-by-step overhaul procedures for 4J and 4H engines, with cooling, fuel-system, starting, charging, and turbocharger service.

• Transmissions and clutch: Manual gearbox overhaul, clutch hydraulic service, MXA transfer repair, and 450-43LE automatic transmission diagnosis and overhaul.

• Brakes and ABS: Hydraulic, parking, and exhaust-brake service, ABS fault charts, wheel speed sensor and rotor replacement, and EHCU assembly replacement.

• Steering and axles: Steering pressure tests, bleeding and gear repair, suspension service, wheel alignment, universal joints, hubs, and differential overhaul.

• Cab electrical systems: Circuit diagrams, connector views, harness routing, component locations, and system checks for starting, charging, lighting, and cab equipment.

• Cab and climate control: Cab-component removal, glazing and sealing work, frame dimensions, heater service, refrigerant-system diagnosis, and compressor overhaul.

• PTO hydraulics: Oil-pump and PTO removal, internal inspection, control-cable adjustment, hydraulic-fluid bleeding, and dump-operation troubleshooting.

This set is suited to technicians familiar with truck repair, electrical testing, and the specialist tools required for component overhaul.

Diesel Engine Repair and Variant Differences

The engine volumes cover cylinder heads, valve gear, pistons, liners, crankshafts, bearings, lubrication, and engine removal. The 4J manual distinguishes gear-driven and belt-driven timing arrangements; the 4H manual includes cylinder-head gasket selection and liner-grade information.

Fuel-system coverage includes injection nozzle inspection and adjustment, injection-pump removal and timing, and air bleeding. The 4H emission and electrical diagnosis sections distinguish 4HE1-T/TC and 4HG1-T systems, with ECM fault charts and circuit checks. Cooling-system sections cover radiator, thermostat, and water-pump service.

Gearbox, Transfer, and Axle Work

The manual-transmission volumes extend into shaft assemblies, synchronizers, bearings, control boxes, and side PTO units. Clutch coverage includes the master and slave cylinders, with booster service where fitted.

The 450-43LE manual combines DTC diagnosis, control-signal inspection, line-pressure tests, stall tests, and road tests with internal overhaul procedures. Oil-pump, clutch-pack, planetary-gear, and valve-body sections provide component-level repair information.

Axle documentation distinguishes semi-floating and full-floating rear hubs, different differential assemblies, and front-axle arrangements. The steering volume separates LHD and RHD power-steering units and includes manual-steering repair.

ABS Diagnosis and Sensor Service

The ABS volume contains 17 DTC charts, warning-light diagnosis, and symptom checks with and without Tech 2. Fault charts address vehicle-type errors, rear-sensor supply faults, EHCU voltage, motor and solenoid circuits, individual wheel sensors, and tire-size errors.

Tech 2 coverage includes current and history codes, code clearing, Clear & Reset Vehicle Type, snapshot recording and replay, and actuator tests for the pump relay, solenoid valves, ABS relay, warning lamp, and exhaust brake cut relay. Comparing front-to-rear and side-to-side wheel-speed snapshots supports investigation of intermittent complaints.

Hold-valve and release-valve tests help identify incorrect brake-pipe or valve-harness connections after repair. DTC 20, Reference Voltage High, is confirmed by warning-light flash diagnosis rather than Tech 2. ABS/ASR identification entries do not constitute a separate ASR service manual.

Front coil-type sensors and rear Hall IC sensors use different test methods. Sensor diagnosis addresses damaged rotor teeth, contamination, bearing play, and intermittent harness connections. Rotor service extends into hub, bearing, and oil-seal work, with separate front and rear preload data.

The EHCU is replaced as an assembly, rather than internally overhauled. An unsupported caliper can stretch or damage its brake hose during front rotor work; EHCU precautions address electrostatic discharge and damage from improper electrical probing.

Wiring References and Diagnostic Tools

The electrical volumes distinguish steering-position, engine, and circuit variants. References include the ABS Circuit Diagram, EHCU Connector List, Start and Charging Circuit Diagram, ECM System Wiring Diagram, EGR System Wiring Diagram, and the MXA Transfer Control Vacuum Actuator Operational Circuit Diagram.

The ABS connector documentation includes J-500 pin-out checks and component-location drawings. Special-tool references identify connector test adapter kit 5-8840-0385-0 (J-35616) and high-impedance multimeter 5-8840-0285-0 (J-39200). Tech 2 setup covers the Isuzu PCMCIA card, SAE 16/19 adapter, and DLC cable.

Cab, Air Conditioning, and Dump PTO

The cab manual includes standard and crew-cab components, body-panel sealing, and frame-dimension drawings. Climate-control coverage addresses factory-installed heater and air-conditioning systems, including refrigerant precautions, component replacement, and compressor overhaul.

The separate PTO manual covers the integrated oil-pump arrangement, hydraulic circuit, and dump-control cables. Its symptom charts connect failure to raise, unintended movement, and abnormal operation with cable, pump, and hydraulic-system checks.

Working on hydraulic brake systems involves critical safety components. All service data shown here is for reference only, as qualified technicians and the original OEM documentation remain the authoritative source for any hands-on repair.

A Preview of 4J Valve and Crankshaft Inspection Data

The 4J specification tables give intake and exhaust valve clearances of 0.40 mm cold and 0.45 mm hot, distinguishing the checking condition rather than presenting a single universal setting.

Crankshaft inspection data list a standard runout of 0.05 mm or less and a service limit of 0.08 mm. These are separate standard and limit values within the engine inspection procedures.