Passthrough mode is set by placing the horizontal switch on the backplane away from the USB connetor. In this mode, TunerPro must be set to MAX232, since the AutoProm, when set to this mode, is just like any other ALDL cable. GM used 12 pin OBD1 type and 16 pin OBD2 type connectors on 94 & 95 vehicles. Assembly Line Diagnostic Link or ALDL is a proprietary on-board diagnostics system developed by General Motors before the standardization of OBD-2. Make sure you order the cable that fits your cars connector.
Q - Does this cable include the 10K ohm A-B resistor needed on many 12 Pin 160 Baud ECMs? Q.- Will this work with my 94-95 6.5 Turbo-Diesel?Ī - Yes it will however you will have to download and use GMTD Scan Basic (free) or GMTD Scan Tech ($) from It was previously called Assembly Line Communications Link or ALCL. Q - Can I disable the 10K ohm A-B resistor?Ī - Yes the 10K resistor can be switched off on the 12 Pin version. Q - Why would I want to disable the resistor?Ī - On a few select ECMs the 10K O resistor is not needed for the data flow but does alter the idle speed and timing. On MOST ECMs the 10K ohm resistor either does not affect the ECM operation, OR the 10K ohm resistor is needed for data flow. If you have questions on the 10K ohm resistor contact me. Turbo T ALDL port TTA port Syclone Post a pic of your cars if it differs in any way. Q - Can I get a version of the 16 pin cable with the switchable 10K O resistor?Ī - No, GM never required the 10K ohm resistor on the 16 Pin OBD1 vehicles and thus my 16 Pin cable has none. 2 The has the pin outs on the obd1 almost certain.
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