Table of ContentsPart I Engine ...........................................................................1Chapter 1 Engine Assembly (MR479Q, MR479QA, MR481QA)...................1Section 1 Routine Inspection.........................................................................................1
Section 2 Drive Belt Replacement ...............................................................................5
Section 3 Valve Clearance Adjustment...........................................................................6Chapter 2 Engine Components Replacement
(MR479Q, MR479QA, MR481QA)................................................................10Section 1 Engine Components....................................................................................10
Section 2 Engine Components Replacement............................................................13
Section 3 Timing Belt Replacement.........................................................................17
Section 4 Camshaft Replacement............................................................................22
Section 5 Cylinder Head Gasket Replacement.........................................................28
Section 6 Oil Pump Oil Seal Replacement................................................................33
Section 7 Engine Rear Oil Seal Replacement............................................................34Chapter 3 Lubrication System (MR479Q, MR479QA, MR481QA)...............35Section 1 Oil Pressure Gage Sensor Replacement....................................................35
Section 2 Oil Pump Assembly Replacement..............................................................36
Section 3 Oil Filter Replacement................................................................................38
Section 4 Starter Replacement.................................................................................39
Section 5 Generator Replacement............................................................................40Chapter 4 Fuel System (MR7131A, MR7151A, MR7161A)........................41Section 1 Check Fuel System Pressure.....................................................................41
Section 2 Fuel Pump Inspection...................................................................................42
Section 3 Fuel Injector Replacement.........................................................................43
Section 4 Fuel Pump Replacement............................................................................45
Section 5 Fuel Emission Control System....................................................................47
Section 6 Carbon Canister Replacement....................................................................48Chapter 5 Exhaust System (MR7131A, MR7151A, MR7161A).................50
Chapter 6 Cooling System Inspection
(MR7131A, MR7151A, MR7161A).................................................................52Section 1 System Check
Section 2 Water Pump, Thermostat and Radiator Replacement.................................... 54Chapter 7 Clutch (MR7131A, MR7151A, MR7161A)....................................56Section 1 Clutch Replacement...................................................................................57Chapter 8 Maunal Transaxle Assembly
(MR7131A, MR7151A, MR7161A)................................................................59Section 1 Manual Transaxle Replacement..................................................................60
Section 2 Vehicle Speed Sensor Replacement
Section 3 Transmission Case Oil Seal..........................................................................62
Section 4 Transaxle Case Oil Seal Replacement........................................................63Chapter 9 General Engine Troubles and Their Troubleshooting....................64Section 1 Overview........................................................................................................64
Section 2 General Engine Fault and Troubleshooting.......................................................64
Section 3 Engine Noise Diagnosis and Troubleshooting................................................77Chapter 10 Engine Management Unit..............................................................81Section 1 System Description.........................................................................................81
Section 2 System Component and Working Principle......................................................82Part II Chassis............................................................................85Chapter 1 Transmission Control Device.........................................................85Section 1 Transmission Control Device.........................................................................85
Section 2 Lever Type Transmission Control Device......................................................85
Section 3 Cable Type Transmission Control Module......................................................87Chapter 2 Accelerator Pedal............................................................................90Section 1 Accelerator Pedal..........................................................................................90Chapter 3 Clutch Control System....................................................................91Section 1 Clutch Control System....................................................................................91
Section 2 Clutch Cable Control Mechanism.....................................................................91
Section 3 Clutch hydraulic Control Device.......................................................................94Chapter 4 Propeller Shaft...............................................................................97...............................................................................................52
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1Part I EngineChapter 1 Engine Assembly
(MR479Q, MR479QA, MR481QA)Section 1 Routine Inspection1. Check coolant
2. Check engine oil
3. Check battery
4. Check air cleaner element assembly
5. Check spark plug
6. Check drive belt
Figure 1
Notice:
zCheck the belt deflection at the specified point See (Figure 1).
zSet tension to specified value when installing new belt.
zCheck the deflection to ensure it is below the specified value after the belt runs for over 5 minutes.
zReinstall the belt which has been running for over 5 minutes. The deflection of the old belt is regarded as
the standard for inspection.
zCheck V-belt for tension and distortion after the engine cranks for 2
turns.
7. Check ignition timing See (Figure 2)
a) Warm up the engine.
b) When using fault diagnosis tester
Connect fault diagnosis tester to fault diagnosis interface socket.
Ignition timing:
MR479Q: 10 ± 2° BTDC (before top dead center) at idle
MR479QA: 10 ± 2° BTDC at idle
MR481QA: 10 ± 2° BTDC at idleFigure 2New Belt mm Old Belt mm
Fan Belt 7~
13. 5
Power steering Belt 5~
66~
8
A/C Belt 6. 5
~78~
9 Belt deflection See (Table 1)
Be lt pre ssure : 98NBelt Looseness
Measuring PointWater pump
Power steering
crankshaftgenerator
Air condition
compressor pump11.5~
9