I'm hoping to get May03LT in on this, since most of my diag was from his posts and videos, and everyone else as well!
Long time lurker, first time poster. Let me see if I can get everything in one post.
2003 TB i6 4.2 4x4 ext. No crank no start. Changed ignition switch and performed PassLock relearn. Successful relearn but no change. Checked voltage of +12, 12v on run, 12v on crank, white, pink, red, red/white, and yellow. All +12v in keyed positions. Ruled out ign sw.
No dash indicator under the PRND321. Letters come up but nothing to tell what gear it's in. Carefully replaced PNSS (thanks for the glue, GM!) and checked voltage on ground and two pinks on the 7-pin connector, with voltage in keyed positions. Did not attempt to jump the two green signal wires to try to start it. Still no indicator dash.
Checked every fuse in both engine and cabin boxes. All fuses have voltage and tolerable resistance (>.2). All fuses good. Double checked tbc fuses 1-5. All good.
IC gauges and lights all come on... With the exception of "service engine soon". It never, ever, lit up. All other lights come on. Gauges seem to respond to key on/key off. Only gauge that reads anything is voltage. I think the gas gauge works, but don't know because I'm not putting gas in a truck I can't get to start.
When key turned to crank, can hear the RAP relay in cabin fuse block click, cannot get starter relay in engine box to engage, after replacing with known good. Jumped starter relay pins 87 (ign A +12v) to pin 30 (sig to starter) and the engine rolls. Rule out starter.
Checked the 3 connectors on the PCM. No signs of corrosion or loose connection. Checked engine block ground, driver fender ground, checked splice block at driver knees behind the dash, checked splice block beside engine fuse block. No signs of corrosion or loose wiring.
Try to connect an OBD2 reader to data port. No comm. Then tried with a Launch CRP129X and got the beautiful U1000. Only code stored in the computer. It read the SRS and the ABS modules fine.
All this was done with an AGM battery with a trickle charger, 12v 2a current, to keep the battery well alive and healthy.
Please folks. What am I missing?! I'm ready to set fire to this thing, and it's my father in laws!
Long time lurker, first time poster. Let me see if I can get everything in one post.
2003 TB i6 4.2 4x4 ext. No crank no start. Changed ignition switch and performed PassLock relearn. Successful relearn but no change. Checked voltage of +12, 12v on run, 12v on crank, white, pink, red, red/white, and yellow. All +12v in keyed positions. Ruled out ign sw.
No dash indicator under the PRND321. Letters come up but nothing to tell what gear it's in. Carefully replaced PNSS (thanks for the glue, GM!) and checked voltage on ground and two pinks on the 7-pin connector, with voltage in keyed positions. Did not attempt to jump the two green signal wires to try to start it. Still no indicator dash.
Checked every fuse in both engine and cabin boxes. All fuses have voltage and tolerable resistance (>.2). All fuses good. Double checked tbc fuses 1-5. All good.
IC gauges and lights all come on... With the exception of "service engine soon". It never, ever, lit up. All other lights come on. Gauges seem to respond to key on/key off. Only gauge that reads anything is voltage. I think the gas gauge works, but don't know because I'm not putting gas in a truck I can't get to start.
When key turned to crank, can hear the RAP relay in cabin fuse block click, cannot get starter relay in engine box to engage, after replacing with known good. Jumped starter relay pins 87 (ign A +12v) to pin 30 (sig to starter) and the engine rolls. Rule out starter.
Checked the 3 connectors on the PCM. No signs of corrosion or loose connection. Checked engine block ground, driver fender ground, checked splice block at driver knees behind the dash, checked splice block beside engine fuse block. No signs of corrosion or loose wiring.
Try to connect an OBD2 reader to data port. No comm. Then tried with a Launch CRP129X and got the beautiful U1000. Only code stored in the computer. It read the SRS and the ABS modules fine.
All this was done with an AGM battery with a trickle charger, 12v 2a current, to keep the battery well alive and healthy.
Please folks. What am I missing?! I'm ready to set fire to this thing, and it's my father in laws!