The exhaust control system (excs) consists of the exhaust control valve (excv), exhaust control valve actuator (excva) and exhaust control valve cables (excv cables).
Excv is installed in the exhaust pipe. Excva is mounted inside of the right frame. The excv is operated by the excva via the cables. This system is designed to improve the engine torque at low engine rpm.
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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 ...
Camshaft inspection
Refer to “engine top side disassembly” .
Refer to “engine top side assembly” .
Camshaft identification
The exhaust camshaft has the embossed letters “ex”
and the intake camshaft has the embossed letters “in”.
Cam wear
Check the camshaft for wear or damage.
Measure the cam height “a” w ...
Spark plug inspection and cleaning
Inspect spark plug
every 6 000 km (4 000 miles, 12 months)
Heat range
Remove the spark plugs. Refer to “ignition coil and spark plug removal
and installation” in section 1h .
Check spark plug heat range by observing electrode
color. If the electrode of the spark plug is wet
appe ...