Code 12 - Starter Switch Off

 

WHAT THE HELL DOES THAT MEAN?

 

 

Code 33 - Coolant Sensor or Circuit

 

 

Any suggestions?

 

 

 

Btw, its a 1986 GL10.

Code 12, means the ECU isn't receiving a signal from the starter circuit when the engine is cranking. There's a wire going to the ECU, not sure which one that is wired to the ignition switch so that it has 12V when the engine is cranking. ECU uses this information to richen the mixture while cranking.

 

Code 33, means either:

A) The wiring to the coolant temperature sensor (the two pronged one, not the one for the gauge) is corroded, and the ECU has no idea what the engine temp is.

 

The Coolant Temp Sensor for the ECU is bad (again, not the same one for the gauge)

 

Its usually A, but on a coupe I had this summer, it was B, and not A.

^yep, he's got it right on.

 

 

and both of these will make cold starting difficult.