Engine General Information and Diagnosis: 1A-10
Self-Diagnostic Procedures
BA02J21104002
Use of FI Indicator Light
NOTE
• Do not disconnect the ECM coupler or
battery lead wire before checking the DTC
(Diagnostic Trouble Code). Such
disconnection may erase the DTC.
• DTC can be checked by the FI indicator
light assy.
• Before checking DTC, read self-diagnosis
function carefully to have good
understanding of the functions available
and how to use them.
• Be sure to read “Precautions for Electrical
Circuit Service” in Section 00 (Page 00-2)
before inspection and observe what is
written there.
1) Remove the left frame cover. Refer to “Exterior Parts
Removal and Installation” in Section 9D (Page 9D-
1).
2) Connect the FI indicator light assy (1) to the mode
select coupler on the wiring harness.
36380-28H00: FI indicator light assy (option)
3) Start the engine or crank the engine for more than 4
seconds.
NOTE
ECM detects the malfunction part by the
cranking or the engine start.
4) Check the DTC to determine the malfunction part.
5) After repairing the trouble, turn off the ignition switch
and turn on again. If the DTC does not indicate, the
malfunction is cleared.
6) Disconnect the FI indicator light assy and install the
left side cover.
Use of SDS
NOTE
• Do not disconnect the coupler from ECM,
the battery cable from the battery, ECM
ground wire harness from the engine or
main fuse before confirming DTC
(Diagnostic Trouble Code) stored in
memory. Such disconnection will erase the
memorized information in ECM memory.
• DTC stored in ECM memory can be
checked by the SDS.
• Be sure to read “Precautions for Electrical
Circuit Service” in Section 00 (Page 00-2)
before inspection and observe what is
written there.
Engine overheats (Lean
fuel/air mixture)
Short-circuited IAP sensor/lead wire. Repair or replace.
Short-circuited IAT sensor/lead wire. Repair or replace.
Sucking air from throttle body or intake
pipe joint.
Repair or replace.
Defective fuel injector. Replace.
Defective ECT sensor. Replace.
Engine overheats (The
other factors)
Ignition timing too advanced due to
defective timing advance system (ECT
sensor, GP sensor, CKP sensor and
ECM.)
Replace.
Drive chain is too tight. Adjust.
Dirty or heavy exhaust
smoke
Worn piston rings or cylinder. Replace.
Too much engine oil in the engine. Check and drain excess oil.
Worn valve guides. Replace.
Scored or scuffed cylinder wall. Replace.
Worn valve stems. Replace.
Defective valve stem seals. Replace.
Worn oil ring side rails. Replace.
Condition Possible cause Correction / Reference Item
1
IA02J1110008-01
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