1986-1993 Mitsubishi L300 Delica Star Wagon Engine and Emission Control Service Manual (P/N 17109000308)
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Mitsubishi Models Covered & Key Technical Specifications
Models: Mitsubishi L300 Delica Star Wagon
Sub-models / Variants: Base, 4WD, SWB Van, MWB Van, GL, GLX, SE Wagon, 2.0L Carburetor, 2.4L EFI
Model Years: 1986–1993
Technical Data:
- Engine types: 4G63 (2.0L), 4G64 (2.4L), 4D56 (Diesel)
- Transmission types: 5-speed manual (KM135, KM147, R5M21, V5M21), 4-speed automatic (AW372, R4AW2, V4AW2)
- Engine idle speed: 750 ± 100 r/min (4D5), 700 ± 100 r/min (6G7)
- Coolant capacity: 7.4–8.7 liters (depending on model)
- Spark plug torque: 20–30 Nm
Mitsubishi Manual Features & Content Preview
- Covers 1986–1993 Mitsubishi L300 Delica Star Wagon models (4WD and RWD), focusing on engine management, emission systems, and auto-cruise diagnostics.
- Official Mitsubishi publication P/N 17109000308 providing technical specifications for 4G63, 4G64, and 4D56 engine configurations.
- Contains 8 cruise control wiring schematics, 12 vacuum diagrams, and 5 detailed torque specification tables.
- Features the exact diagnostic flowcharts used for the 4D56 diesel and 6G7 gasoline engine control systems, including unique auto-cruise component testing parameters.
Engine and Emission Control Scope
Need exact vacuum routing for a 4D56? This 79-page OEM reference details the technical requirements for internal combustion and auxiliary management systems. It outlines the cable-type accelerator mechanism, emission control device tables, and comprehensive vacuum circuit layouts for both the 6G7 and 4D5 engine families. You get a clear structural overview of the crankcase ventilation, evaporative emissions, and exhaust gas recirculation (EGR) systems. Component locations and specific adjustment parameters for sensors are clearly mapped out, saving you diagnostic time in the bay. Please note that working on fuel and emission systems requires strict adherence to factory safety protocols to prevent component damage or personal injury.
Specification and Diagnostic Data
This documentation provides critical reference values for engine maintenance and electrical diagnostics. For example, EGR valve torque is specified at 22 Nm, while accelerator cable play is documented at 1–2 mm. The diagnostic section features extensive MUT-II communication troubleshooting procedures for the cruise control module. It thoroughly covers crucial sensor input thresholds and pump relay logic. Having these factory pinout signals and vacuum pressures readily available assists technicians in verifying issues quickly and accurately without guesswork.
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