Nissan 300ZX manual, covers 1984–1990 (P/N SM9E-0Z31U0)

This 6,387-page, seven-PDF collection brings together Nissan factory service-manual content for the 300ZX. Verified Z31 coverage is 1984 and 1986–1989, followed by a separate 1990 Z32 export-market manual. It is not one 1983 edition covering the full 1984–1990 Z31 production run. The supplied PDFs are later digitized reproductions of publications issued by Nissan Motor Co., Ltd.

• Documents VG30E and VG30ET engine repair, including compression testing, timing-belt work, cylinder-head service, lubrication and cooling checks, turbocharger inspection, engine removal, and internal overhaul.
• Covers clutch hydraulics and the FS5W71C, FS5R90A/Borg-Warner T-5, FS5R30A, and E4N71B transmissions as applicable by year and engine, with adjustment, removal, teardown, inspection, assembly, and diagnostic coverage.
• Details R200 differential setup, propeller-shaft diagnosis, CV halfshafts, wheel hubs, suspension, alignment, brake hydraulics, calipers, rotors, parking brake, and power-steering repair.
• Supports electrical and drivability diagnosis with ECCS self-diagnosis, control-unit input/output checks, component tests, circuit schematics, connector views, and harness routing.
• Includes body, glass, door, power-window, seat, restraint, heater, and air-conditioning service for the two-seat and 2+2 bodies and standard-roof or T-bar configurations identified in the individual manuals.
• Adds a distinct 1990 Z32 section covering VG30DE/VG30DETT powertrains, Z32 driveline hardware, Super HICAS, and Nissan CONSULT-based diagnosis; this portion does not apply to a Z31.

Engine, Transmission, and Driveline Repair

The Z31 engine chapters identify VG30E non-turbo and VG30ET turbo applications and organize repair work around factory component groups. Coverage includes compression testing, timing-belt removal and installation, cylinder-head disassembly and repair, oil-pressure testing, oil-pump and water-pump service, thermostat and radiator work, turbocharger inspection, engine removal, and cylinder-block overhaul. Service Data and Specifications sections provide the applicable torque sequences, capacities, adjustment data, clearances, and wear limits without forcing the technician to combine figures from an aftermarket source.

Fuel and emission chapters trace the ECCS system from component location and operating logic through self-diagnosis and individual checks for the airflow meter, crank-angle sensor, cylinder-head temperature sensor, throttle-position sensor, injectors, oxygen sensor, knock sensor, fuel pump, EGR, AIV, idle controls, and evaporative-emission hardware.

Transmission coverage varies by model. It includes clutch pedal and hydraulic service; major repair of the applicable manual gearbox; and E4N71B road, stall, and pressure testing, electrical diagnosis, removal, component repair, and reassembly. Differential material covers pinion height and preload, side-bearing preload, backlash, tooth contact, and halfshaft service. Factory tool references include ST10120000/J24239-01 for cylinder-head bolts, KV10110600/J33986 for valve-spring work, and KV319K0010/J34270 for automatic-transmission diagnosis.

Chassis, Body, HVAC, and Electrical Diagnosis

Chassis chapters cover front and rear suspension, wheel bearings, alignment, adjustable dampers, brake bleeding and hydraulic repair, caliper and rotor service, parking-brake adjustment, and power-steering system tests and component overhaul. Body information includes doors, locks, windows, mirrors, seats, belts, glass sealing, T-bar roof hardware, and body alignment. Heater and air-conditioning sections provide performance testing, evacuation and charging coverage, control-circuit diagnosis, and automatic climate-control self-diagnosis where fitted.

Electrical references include ECCS circuit and wiring diagrams, the E4N71B control schematic, adjustable-shock-absorber fault charts, manual and automatic A/C circuits, digital and needle-type combination-meter diagrams, and engine-room, EFI, instrument, console, A/C, and rear-body harness layouts.

Two component-specific cautions are especially useful during repair: the ECCS control unit can be damaged if its harness is disturbed while battery power is still present, and rack teeth can cut the steering-gear packing during assembly. Follow the General Information precautions for lifting, fuel pressure, brake hydraulics, and refrigerant work.

File and Model-Year Coverage

Page count: 6,387 PDF pages total — 1984: 684; file labeled 1985: 656; 1986: 903; 1987: 969; 1988: 985; 1989: 993; 1990: 1,197. The 1989 manual identifies Nissan Publication No. SM9E-0Z31U0, June 1988 edition and printing.

Important fitment note: the 656-page PDF labeled 1985 identifies itself internally as a 1986 manual and omits the Engine Fuel & Emission Control and Heater & Air Conditioner chapters found in the complete 903-page 1986 file. It should not be used as verified 1985-specific repair information. The 1990 PDF is a Z32 export manual for Europe/Australia configurations rather than a Z31 continuation; its model tables list FS5R30A, RE4R01A/RE4R03A, and R200V/R230V applications.

This material is best suited to experienced DIY owners and technicians who can work from factory schematics and use electrical, pressure-test, and measuring equipment. Routine maintenance sections are approachable, but internal engine and transmission repair and refrigerant service assume workshop skills and appropriate tools.