mitchell on demand
#7
Senior Member
True Car Nut
Here'* the first of several questions I have: (97 L67 VIN 1)
My 97 service manual indicates that the fuel sending unit has an output range of 40 to 250 ohms. This output goes into the PCM and there is an output to the fuel gauge. Although it does not specifically state the range of the PCM output/gauge input, it describes in the gauge testing procedures to test with 0 ohms empty and 90 ohms full. This doesn't make sense as the 97 cluster is in my 93 which has a sending unit range of 0 to 90 ohms but the fuel gauge never goes over 1/4 tank.
I'd like to know what Mitchell says the PCM fuel level output/fuel gauge input range is in ohms to confirm that those that wrote this book were on crack.
Thanks
My 97 service manual indicates that the fuel sending unit has an output range of 40 to 250 ohms. This output goes into the PCM and there is an output to the fuel gauge. Although it does not specifically state the range of the PCM output/gauge input, it describes in the gauge testing procedures to test with 0 ohms empty and 90 ohms full. This doesn't make sense as the 97 cluster is in my 93 which has a sending unit range of 0 to 90 ohms but the fuel gauge never goes over 1/4 tank.
I'd like to know what Mitchell says the PCM fuel level output/fuel gauge input range is in ohms to confirm that those that wrote this book were on crack.
Thanks
#9
Senior Member
True Car Nut
Thank you for looking that up.
I wonder why the 97 cluster doesn't indicate the right fuel level then. Time to break out the resistors for testing.
I wonder why the 97 cluster doesn't indicate the right fuel level then. Time to break out the resistors for testing.