

Terminal voltage check with a low battery voltage will lead to erroneous diagnosis.

Otherwise, accurate measurements may not be obtained and personal injury may result.
Electrical circuit inspection procedure
While there are various methods for electrical circuit inspection, described here is a general method to check for open and short circuit using an ohmmeter and a voltmeter.
Ecm / various sensors
Open circuit checkOil pressure indicator inspection
Inspect the oil pressure indicator in the following
procedures:
Note
before inspecting the oil pressure switch, check if the engine oil level
is correct. Refer to “engine oil and filter replacement” in section 0b .
Remove the left side cowling. Refer to “exterior parts remov ...
Rear brake master cylinder components
Reservoir cap
Plate
Diaphragm
Reservoir tank
Reservoir hose
Brake hose
Brake hose union bolt
Brake hose connector
Master cylinder
Spring
Piston/cup set
Push rod
Dust boot
23 N·m (2.3 Kgf-m,
16.5 Lbf-ft)
10 N·m
...
DTC “c42” (p1650): ig switch circuit
malfunction
Detected condition and possible cause
Detected condition
Possible cause
Ignition switch signal is not input to the ecm.
Ignition system circuit open or short.
Ecm malfunction.
When the id agreement is not verified.
Ecm does not re ...