LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

scanmaster reading code 70????

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Old May 28, 2006 | 03:04 PM
  #1  
detroit1994z28's Avatar
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scanmaster reading code 70????

My scanmaster just recently put a code 70 under the dtc mode. Does anyone know what this code is?? I been trying to find it in the manual but there's no such code as a 70. The car was reading code 21 - I replaced the tp sensor and 15 minutes of driving the 70 code appeared - Need help?
Old May 28, 2006 | 03:51 PM
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Re: scanmaster reading code 70????

70 A/C clutch relay driver circuit
You can find a list of codes here.

Did you happen to disturb any other wiring while changing the TPS?
Old May 28, 2006 | 04:03 PM
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Re: scanmaster reading code 70????

Hey thanks buddy. I been looking for this code for over 2 hours. Thanks again dude. - I appreciate it - Mike
Old May 29, 2006 | 01:10 AM
  #4  
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Re: scanmaster reading code 70????

The code is also listed in my online ScanMaster manual......

http://members.aol.com/InjuneerZZ/ScanMast.htm
Old May 29, 2006 | 08:27 AM
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Re: scanmaster reading code 70????

- A/C clutch relay driver is the problem. Is that the ac relay in the fuse box??? I tested the one in my car and it's working. If that's not it then where is this relay located exactly. The book shows this as a ac compressor relay --- that's what I check - turned out to be good.
Old May 29, 2006 | 08:33 AM
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Re: scanmaster reading code 70????

the "relay driver" is the signal wire that the PCM uses to trigger that relay
Old May 29, 2006 | 11:07 AM
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Re: scanmaster reading code 70????

Originally Posted by Dave89IROC
the "relay driver" is the signal wire that the PCM uses to trigger that relay
So you think it might be a bad wire or something. Do you know what color that wire is by anychance?
Old May 29, 2006 | 11:13 AM
  #8  
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Re: scanmaster reading code 70????

yes, might be a wire,

dark green with a white tracer, from pin 8, connector D(blue) at the PCM
Old May 29, 2006 | 11:25 AM
  #9  
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Re: scanmaster reading code 70????

Originally Posted by Dave89IROC
yes, might be a wire,

dark green with a white tracer, from pin 8, connector D(blue) at the PCM
Thanks - Mike
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