Car was brought to dealership with no crank no start, they were able to get car to start only with obd2 plugged in. Checked both grounds on obd2 port chassis ground is good but signal ground is not. Signal ground to battery ground starts the vehicle. When vehicle is tried to start without scanner just cranks and does not fire while doing this if scanner is plugged in immobilizer will disable starting until ignition is turned off then back on. Only engine code is P0499 which has been on for awhile with no issue.
Found schematic for pin 5 signal ground but unsure where grounding issue would be within circuit.
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Thursday, June 14th, 2018 AT 10:06 AM