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Old 04-15-2016, 06:09 AM
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Join Date: Jan 2002
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Here is a procedure from one of the best and most experienced Yamaha Master Techs in the country.

Oil Transfer Troubleshooting - if Emergency Transfer swtich is working

that system will mostly test/troubleshoot itself.
ya just have to pay attention.

by the fact that it works manually, tells you the 12V feed(brown wire) and the ground path back to within inches of the ECU(blue wire) is good.
also tells us the pump is ok.

if the engine oil level is between the marks and you turn the key on and get 3 bars,tells me the remote tank switch OR harness is open and no automatic transfer can occur.

now we are down to SW2,SW3 or a restrited line or filter.

a restriction will allow the engine to consume oil faster than it can be transfered.

so how I would start, knowing the transfer pump works manually.
1 fill the engine tank with the manual switch so the level is between the marks.
visually inspect the remote tank for at least 1/2 full.
turn the key on and look at the tach
should see three solid,green lamp or far right bar.
if center bar is lit or yellow lamp then chase the remote switch(SWB) and wiring for opens.
then with the key still on, drain the engine tank until the alarm sounds and recap the drain.
transfer pump should turn on and run for 180 seconds and all bars flash.

to test power and ground to the engine tank switch you ask?
dont even need a meter.
start the engine,unplug the switch, should get an alarm.
if not you have a switch or harness issue,possibly an ECU but its very very very,did I mention VERY rare that an ecu fails.

now if you get an alarm while the engine is running and you unplugged it power and ground to the switch most likly works.
shut the engine off.
restart the engine after about 15 seconds.
now with the engine running on the engine harness side of the oil tank connector.
jump black to blue/green transfer pump should run.
now the only way to shut it off is jump black to blue/white or turn the key off.

see I just spent 15 min testing 90% of the precision blend transfer system and havent broken out a meter yet, no need to yet.

if you start the engine with the engine tank unplugged you get no alarm.
if the connector becomes unplugged while running you get an alarm.
ALWAYS make sure that connector is PLUGGED together before using the system after testing.

green lamp means the switch in the remote tank and circuits are ok.
key on engine off.
unplug the engine tank switch.
jump,with a bent paper clip,from black to brown.
pump should run.
this test will only work for oil control modules made prior to about 2004.
later modules will have a green/white wire going to the CDI unit.
if the pump runs then jump from black to white,pump should shut off.