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I stand corrected Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Wed, 2 Jan 2002 22:39:01
In Reply to: Pressure transducer, Ari [Profile/Gallery]
, Wed, 2 Jan 2002 17:16:22
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Indeed, the APC does use a pressure signal to control boost. Hit me over the head with an A-arm for missing that one. Yes, that is the APC boost pressure transducer.
The Bentley manual talks about testing the transducer (page 291-8). The sensor is actually a resistance device but if it's in the circuit, you'll read voltage on it. To quote the Bentley manual to test-
Disconnect the harness from the APC. With a meter set to resistance, measure between pins 10 and 23 (this is at the APC box). The resistance at atmospheric pressure should be between 5 and 13 ohms. I figure you could just measure the resistance at the sensor, just disconnect one leg from the circuit, or you'll be measuring the resistance of the APC box, too.
Next, apply a pressure gauge to the sensor and pump it up to 1 bar (14.5 psi), then slowly reduce the pressure to 0.6 bar (8.7 psi) while tapping lightly on the sensor. Check the resistance at this point it should be 83 to 92 ohms.
Good luck!
posted by 12.90.1...
, Wed, 2 Jan 2002 13:09:57, Wed, 2 Jan 2002 17:16:22, Wed, 2 Jan 2002 22:39:01 <-- Viewing This Message
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