Kawasaki Z1000 - ZR1000 2003-04 Service Manual - Small Engine ...

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Self-Diagnosis
FUEL SYSTEM (DFI) 3-39
Service
Codes
51
52
53
54
62
Parts
Stick Coil
#1 (Ignition
Coil)*
Stick Coil
#2 (Ignition
Coil)*
Stick Coil
#3 (Ignition
Coil)*
Stick Coil
#4 (Ignition
Coil) *
Subthrottle
Valve
Actuator
Output Signal Usable
Range or Criteria
The stick coil primary
winding must send
signals (output voltage)
continuously to the ECU.
The stick coil primary
winding must send
signals (output voltage)
continuously to the ECU.
The stick coil primary
winding must send
signals (output voltage)
continuously to the ECU.
The stick coil primary
winding must send
signals (output voltage)
continuously to the ECU.
The actuator operates
open and close of the
subthrottle valve by the
pulse signal from the
ECU.
Backups by ECU
If the ignition primary winding #1 has failures (no
signal, wiring short or open), the ECU shuts off
the injector #1 to stop fuel to the cylinder #1,
though the engine keeps running.
If the ignition primary winding #2 has failures (no
signal, wiring short or open), the ECU shuts off
the injector #2 to stop fuel to the cylinder #2,
though the engine keeps running.
If the ignition primary winding #3 has failures (no
signal, wiring short or open), the ECU shuts off
the injector #3 to stop fuel to the cylinder #3,
though the engine keeps running.
If the ignition primary winding #4 has failures (no
signal, wiring short or open), the ECU shuts off
the injector #4 to stop fuel to the cylinder #4,
though the engine keeps running.
If the subthrottle valve actuator fails (the signal is
out of the usable range, wiring short or open), the
ECU stops the current to the actuator.
Note:
(1) D-J Method and α – N Method: When the engine load is light like at idling or low speed, the ECU
determines the injection quantity by calculating from the throttle vacuum (inlet air pressure sensor
output voltage) and engine speed (crankshaft sensor output voltage). This method is called D-J
method (low-speed mode). As the engine speed increases, and the engine load turns middle to
heavy, the ECU determines the injection quantity by calculating from the throttle opening (throttle
sensor output voltage) and the engine speed. This method is called α – N method (high-speed
mode).
(*) This depends on the number of stopped cylinders.