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.
Brake Light Switch Operation Inspection
Turn the ignition switch to ON.
The brake light (LED) [A] should go on when the brake
lever is applied or after the brake pedal is depressed
about 10 mm (0.39 in.).
If it does not, adjust the brake light switch.
Remove the front footpeg bracket (see Brake Pedal Removal
in the B ...
Location of labels
All warning labels which are on your
vehicle are repeated here. Read labels
on your vehicle and understand them
thoroughly. They contain information
which is important for your safety and
the safety of anyone else who may operate
your vehicle. Therefore, it is very
important that all warning ...
KIBS Warning Indicator Light (For models equipped
with KIBS)
The yellow warning indicator light in
the meter unit functions as the KIBS
warning indicator light. The yellow
warning indicator light and warning
symbol “KIBS” go on if there is a malfunction
in the KIBS system. When the
warning light is on, the KIBS system
stops functioning. However, th ...