NOTE
These procedures are explained on the assumption that the intake and exhaust systems of the engine are in good condition.
NOTE
When the engine is running, the ECU detects the service code 16. But the engine synchronization can be inspected correctly.
Special Tool - Vacuum Gauge: 57001-1369
Fuel Pump Lead Connector [A] Extension Tube [B]
Special Tool - Extension Tube: 57001-1578
Intake Air Temperature Sensor [A] ECU [B] ESD ECU (ZX1000JD/KD) Secondary Fuel Hose [C] (see Fuel Hose Replacement)
NOTE
When the ignition switch is turned ON without the intake air temperature sensor, the ECU detects the service code 13. Then the ECU starts the fail-safe (see Self-diagnosis Outline in the Fuel System (DFI) chapter).
In this case, the engine vacuum synchronization can not be inspected correctly.
The engine vacuum synchronization is inspected with the air cleaner housing removed and the engine started.
The secondary fuel injectors are operating with following conditions.
1. The engine speed is more than 6 000 r/min (rpm).
2. The throttle opening is more than 12°.
WARNING Gasoline is extremely flammable and can be explosive under certain conditions, especially when atomized by the fuel injector nozzle. To prevent a fire or explosion, be sure the secondary fuel injector connectors are disconnected before starting the engine so that fuel cannot be sprayed by the injectors. |
Idle Speed Standard: 1 100 ±50 r/min (rpm)
If the idle speed is out of the specified range, inspect the idle speed control valve (see Idle Speed Control Valve Inspection in the Self-Diagnosis System chapter).
NOTICE
Do not measure the idle speed by the meter unit.
Throttle Body Vacuum Standard: 30.7 ±1.33 kPa (230 ±10 mmHg) at idle speed
View from Front [B]
Special Tool - Pilot Screw Adjuster, D [C]: 57001-1588
NOTE
Therefore, the secondary fuel injectors do not operate while adjusting the engine vacuum synchronization. If raising the engine speed more than 6 000 r/min (rpm), the engine may not operate smoothly.
View from Rear [E]
If all vacuums are within the specification range, finish the engine vacuum synchronization.
If any vacuum can not be adjusted within the specification, remove the bypass screws #1 ∼ #4 and replace them with new ones.
Bypass Screw
Spring [B]
Washer [C]
O-ring [D]
If any carbons accumulate, wipe the carbons off from the hole, using a cotton pad penetrated with a high flash-point solvent.
NOTICE
Do not over-tighten the bypass screw. The tapered portion [E] of the bypass screw could be damaged.
NOTE
A throttle body has different “turns out” of the bypass screw for each individual unit. On setting the bypass screw, use the “turns out” determined during disassembly.
If the vacuums are correct, check the output voltage of the main throttle sensor (see Main Throttle Sensor Output Voltage Inspection in the Self-Diagnosis System chapter).
Special Tool - Throttle Sensor Setting Adapter: 57001 -1538
Main Throttle Sensor Output Voltage
Connections to Adapter: Degital Meter (+) → R (sensor L) lead
Degital Meter (–) → BK (sensor V/W) lead
Standard: DC 0.64 ∼ 0.68 V at idle throttle opening
If the output voltage is out of the standard, check the input voltage of themain throttle sensor (see Main Throttle Sensor Input Voltage Inspection in the Self-Diagnosis System chapter).
Run the vacuum hose according to Cable, Wire, and Hose Routing section in the Appendix chapter.
Radiator Cap Inspection
Remove:
Radiator Cap (see Coolant Change in the Periodic Maintenance
chapter)
Check the condition of the bottom [A] and top [B] valve
seals and valve spring [C].
If any one of them shows visible damage, replace the cap
with a new one.
Install the cap [A] on a cooling system pr ...
Fuel Pressure Inspection
NOTE
Be sure the battery is fully charged.
Remove:
Fuel Tank Covers (see Fuel Tank Removal)
Fuel Tank Bolts (see Fuel Tank Removal)
Primary Fuel Hose (see Fuel Hose Replacement in the
Periodic Maintenance chapter)
Be sure to place a piece of cloth around the fuel outlet
pipe of the ...
Inquiries to Rider
Each rider reacts to problems in different ways, so it is important to
confirm what kind of condition
the rider is dissatisfied with.
Try to find out exactly what problem occurs under exactly what
conditions by asking the rider; knowing
this information may help you reproduce the prob ...