Suzuki GSX-R 1000 Service Manual: Self-diagnosis function
The self-diagnosis function is incorporated in the ecm. The function has two modes, “user mode” and “dealer mode”.
The user can only be notified by the lcd (display) panel and led (fi indicator light). To check the function of the individual fi system devices, the dealer mode is provided. In this check, the special tool is necessary to read the code of the malfunction items.
User mode
*1
When one of the signals is not received by ecm, the fail-safe circuit works and injection is not stopped. In this case, “fi” and odd / trip / clock / panel light brightness / lap time counter are indicated in the lcd panel and motorcycle can run.
*2
The injection signal is stopped, when the camshaft position sensor signal, crankshaft position sensor signal, tip-over sensor signal, #1, #2, #3 and #4 ignition signals, #1, #2, #3 and #4 injector signals, fuel pump relay signal or ignition switch signal is not sent to ecm. In this case, “fi” is indicated in the lcd panel. Motorcycle does not run.
“Chec”:
the lcd panel indicates “chec” when no communication signal from the ecm is received for 5 seconds.
For example:
the ignition switch is turned on, and the engine stop switch is turned off. In this case, the speedometer does not receive any signal from ecm, and the panel indicates “chec”. If chec is indicated, the lcd does not indicate the trouble code. It is necessary to check the wiring harness between ecm and speedometer couplers.The possible cause of this indication is as follows: engine stop switch is in off position. Side-stand/ignition inter-lock system is not working. Ignition fuse is burnt.
“Sd”:
the lcd panel indicates “sd” when the steering damper solenoid malfunction, battery abnormal voltage and speed sensor malfunction occurred.
Dealer mode
The defective function is memorized in the computer. Use the special tool’s coupler to connect to the mode select switch. The memorized malfunction code is displayed on lcd (display) panel. Malfunction means that the ecm does not receive signal from the devices. These affected devices are indicated in the code form.
 Caution
If the coupler from the ecm is disconnected, the malfunction code memory is erased and the malfunction code can not be checked. |
Special tool
(a): 09930–82720 (mode selection
switch)
Injection timing description
Injection time (injection volume)
The factors to determine the injection time include the basic fuel injection
time, which is calculated on the basis of the
intake air pressure, engine speed and t ...
Schematic and routing diagram
FI system wiring diagram
Terminal alignment of ecm coupler
...
Other materials:
Spark plugs
Your motorcycle comes equipped
with ngk cr9e or denso
u27esr-n spark plugs. To determine
if the standard spark plug is
right for your usage, check the
color of the plug's porcelain center
electrode insulator after motorcycle
operation. A light brown
color indicates that the plug is correct.
...
Rear shock absorber removal and installation
Removal
Remove the right side cowling and side frame covers. Refer to “exterior
parts removal and installation” in section 9d .
Support the motorcycle with a jack to relieve load on
the rear shock absorber.
Remove the left muffler and muffler chamber heat guard no. 2. Refer ...
DTC “c21” (p0110-h/l): iat sensor circuit
malfunction
Detected condition and possible cause
Detected condition
Possible cause
C21
Output voltage is not with in the following
range.
0.15 V ≤ Sensor voltage < 4.85 V
Iat sensor circuit open or short.
Iat sensor malfunction.
Ec ...