Zontes ZT350T-D Maintenance Manual page 7

Poor acceleration ...................................................................................................................................................................... 85
High idling speed of hot car ...................................................................................................................................................... 85
Unsteady idle speed of cooling car ........................................................................................................................................... 85
Unsteady idling, easy to cutoff ................................................................................................................................................. 86
Analysis flow chart of EFI failure indicator light always on ....................................................................................................... 87
Electrical schematic diagram of EFI system .............................................................................................................................. 88
4. Ignition system .............................................................................................................................................................................. 89
Know Before Service ................................................................................................................................................................. 89
Troubleshooting ........................................................................................................................................................................ 90
Ignition system layout ............................................................................................................................................................... 91
Electrical schematic diagram of ignition system ....................................................................................................................... 91
Ignition system inspection ........................................................................................................................................................ 92
Ignition timing ........................................................................................................................................................................... 92
Ignition coils .............................................................................................................................................................................. 93
5. Starting system ............................................................................................................................................................................. 94
Know Before Service ................................................................................................................................................................. 94
Troubleshooting ........................................................................................................................................................................ 94
1. Starting relay ................................................................................................................................................................. 94
2. Starter motor ................................................................................................................................................................ 95
3. The starter motor runs slowly ....................................................................................................................................... 95
4. The starter motor is working normally, but the engine cannot be started .................................................................. 95
Ignition system layout ............................................................................................................................................................... 95
Starting system electrical schematic diagram ........................................................................................................................... 96
Starter motor ............................................................................................................................................................................ 96
1. Remove the starter motor ............................................................................................................................................ 96
2. Disassemble the starter motor ..................................................................................................................................... 97
Examination .............................................................................................................................................................. 98
Starter motor front cover： .............................................................................................................................. 98
Motor back cover： .......................................................................................................................................... 98
Denki： ............................................................................................................................................................. 98
Check the starting relay ............................................................................................................................................................ 99
1. Operation check ............................................................................................................................................................ 99
2. Check the relay coil ....................................................................................................................................................... 99
2.1 Input line ............................................................................................................................................................. 99
2.2 Ground wire ........................................................................................................................................................ 99
3. Check the starting relay ................................................................................................................................................ 99
4. Disassembly and assembly of the starting relay ........................................................................................................... 99
6. Fuel supply system ...................................................................................................................................................................... 100
Know Before Service ............................................................................................................................................................... 100
Fuel tank removal ................................................................................................................................................................... 100
1. Disassemble the fuel tank assembly ........................................................................................................................... 100
2. Disassemble the fuel pump ......................................................................................................................................... 101
4. Remove the external parts of the fuel tank assembly. ............................................................................................... 102
Examination ............................................................................................................................................................................ 102
1. Fuel pressure test ........................................................................................................................................................ 102
2. Fuel pump inspection .................................................................................................................................................. 102
3. Oil level sensor ............................................................................................................................................................ 102
7. Cooling system ............................................................................................................................................................................ 103
Know Before Service ............................................................................................................................................................... 103
Troubleshooting ...................................................................................................................................................................... 103
1. The engine temperature is too high:........................................................................................................................... 103
2. The engine temperature is too low: ............................................................................................................................ 103
3. Coolant leakage ........................................................................................................................................................... 103
Coolant system distribution map ............................................................................................................................................ 104
Coolant flow diagram .............................................................................................................................................................. 104
Cooling system disassembly .................................................................................................................................................... 105
D350 Remove the radiator assembly .............................................................................................................................. 105
Coolant system hoop/clamp distribution map ............................................................................................................... 106
Thermostat assembly and small loop ............................................................................................................................. 106
Cooling system accessories ..................................................................................................................................................... 107
1. Main water tank .......................................................................................................................................................... 107
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