Puzzling question

[Green7mgte]

Originally Posted by TonkaTim

it's coding a 51 and I can not find any info on a 51 code. Was hoping one of you could give me a heads up.
Thanks in advance,
Tim

http://www.cygnusx1.net/supra/TechTi...ror_codes.aspx
(for a 91 model, but still might be of use)

51 Switch Signal Diagnosis

• No "IDL" signal, "NSW" signal or "A/C" signal to ECU, during diagnosis check.

Trouble Area

• A/C switch circuit
• A/C switch
• A/C amplifier
• Throttle position sensor circuit
• Throttle position sensor
• ECU

[TonkaTim]

Originally Posted by Green7mgte

http://www.cygnusx1.net/supra/TechTi...ror_codes.aspx
(for a 91 model, but still might be of use)


51 Switch Signal Diagnosis

• No "IDL" signal, "NSW" signal or "A/C" signal to ECU, during diagnosis check.

Trouble Area

• A/C switch circuit
• A/C switch
• A/C amplifier
• Throttle position sensor circuit
• Throttle position sensor
• ECU

Green,

Thanks for the quick reply. I was on that site and missed that page. Was looking at the codes here http://www.cygnusx1.net/Supra/Librar...aspx?S=FI&P=28 .

Sun is starting to drop so it'll be getting cold & dark fairly soon for me. So I need to go find my ohm meter and check the reading on the TPS tommorow.

I take it no idle signal on the TPS may prevent the computer from letting the car start? (never had a TPS problem on any car I've owned)

[cre]

A code 51 will present if the TPS is not properly adjusted when the throttle is fully closed or if the TPS is unplugged... or if you press the throttle while checking error codes.

If the A/C is turned on or active this code will present or if the A/C was removed and the signal line was grounded.

NSW is not applicable.

It's academic anyway, a code 51 will not prevent the vehicle from starting and really only affects the vehicle at idle.

Have you checked the EFI relay and the EFI fuse?