Two active codes. 12, 35

1992 ISUZU TRUCK
240,000 MILES • 2.6L • 4 CYL • 2WD • MANUAL
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BIGRED94
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i have an engine light on and i did the flash code. the ECM flashed 12 and 35. i have a crank but no start. the truck has no spark. all spark related components have been replaced. plugs, wires, ICM, distributor, ignition controller. i still have no spark. i am running out of things. i checked all of the ground location, everything is in good condition.
Mar 16, 2018 at 6:42 PM
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ASEMASTER6371
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Good morning.

Code 12 is normal when checking codes on a no start.

35 is different. there is a wire harness issue. below is the description of the issue. inspect the harness carefully.

Roy

CODE 35 Ignition power transistor harness open circuit.
Mar 17, 2018 at 4:01 AM
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BIGRED94
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thanks for responding. would you happen to know were the ignition power transistor is? i can start there and work my way back on the harness. i have tried to find what the part looks like so i can at least locate it.
Mar 17, 2018 at 6:55 AM
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ASEMASTER6371
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It is under the intake manifold. Pictures attached.

Roy
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Mar 17, 2018 at 7:04 AM
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BIGRED94
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The pictures you have supplied belong to the ignition controller and the ignition control module. both i am getting proper voltage to .
Mar 17, 2018 at 7:08 AM
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ASEMASTER6371
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Bottom one is the power transistor.

Roy
Mar 17, 2018 at 7:14 AM
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BIGRED94
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Do you by chance have the wiring schematic? might possibly run jumper wires from the ECM to the sensor.
Mar 17, 2018 at 9:30 AM
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ASEMASTER6371
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attached.

Roy
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Mar 17, 2018 at 9:37 AM
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BIGRED94
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thanks. can one of the diodes in the fuse panel cause a no start problem if they failed?
Mar 17, 2018 at 9:54 AM
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ASEMASTER6371
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no, they control the gauges.

Roy
Mar 17, 2018 at 10:01 AM