01-21-2015, 06:42 AM
Hi!
Failed NJ state emissions test with P0740 and an inoperative MIL.
I bought a salvaged instrument cluster that fixed the burnt out MIL plus took away my screeching speedometer. I took apart the original speedo with 132k miles and learned that even with the copper cup and needle removed I still had noise from the bushing for the magnet. New to me cluster seems all a go and has only 83k miles.
Back to P0740. Not knowing what a TCC is I have relied only on my 1997 Factory service manual.
My vehicle: 1997 Tracker 2 door convertible 1.6 liter 16V automatic 4x4
Let me say I have NO driveability issues. All gears engage smoothly, though I am unsure in my ability to sense the application of the TCC around 50 mph. If I tap the brakes at 50+mph while holding steady throttle then my answer would be that the engine RPM do NOT blip up. I do not know for sure what I am doing and I may be 100% wrong. I get 25-26 mpg with mixed driving.
The automatic is a 3 speed 3L30 and there is a whole diagnostic section for code P0740. I have learned my way through the electrical diagnosis steps 1-9. Each value has been a YES, which directs me from step 9 to step 15. I only own a $15 code reader that does not give me values during a drive test, but while driving down a level road with steady throttle my Engine RPMs with my instrument cluster tachometer are real close to the specified values of 3000 rpm at 55 mph and 3500 rpm for 65 mph. With this the diagnostic tree points me to #16 which call for me to plug in a known good PCM. Hmphf! Santa did not put one in my stocking this year.
Do I trust the factory service manual for the diagnostics? Should I track down a salvage yard PCM? How much is a PCM? I was real happy that the instrument cluster was $90, but I could see on eBay that this was in line. I did not see many PCMs, plus how do I know which years work? The cluster was easy to match up at the salvage yard counter, but I do not know how to shop for a PCM.
I sure need an inspection sticker and have until 2-28-15 to get this fixed.
Thanks for reading!
Allen
Failed NJ state emissions test with P0740 and an inoperative MIL.
I bought a salvaged instrument cluster that fixed the burnt out MIL plus took away my screeching speedometer. I took apart the original speedo with 132k miles and learned that even with the copper cup and needle removed I still had noise from the bushing for the magnet. New to me cluster seems all a go and has only 83k miles.
Back to P0740. Not knowing what a TCC is I have relied only on my 1997 Factory service manual.
My vehicle: 1997 Tracker 2 door convertible 1.6 liter 16V automatic 4x4
Let me say I have NO driveability issues. All gears engage smoothly, though I am unsure in my ability to sense the application of the TCC around 50 mph. If I tap the brakes at 50+mph while holding steady throttle then my answer would be that the engine RPM do NOT blip up. I do not know for sure what I am doing and I may be 100% wrong. I get 25-26 mpg with mixed driving.
The automatic is a 3 speed 3L30 and there is a whole diagnostic section for code P0740. I have learned my way through the electrical diagnosis steps 1-9. Each value has been a YES, which directs me from step 9 to step 15. I only own a $15 code reader that does not give me values during a drive test, but while driving down a level road with steady throttle my Engine RPMs with my instrument cluster tachometer are real close to the specified values of 3000 rpm at 55 mph and 3500 rpm for 65 mph. With this the diagnostic tree points me to #16 which call for me to plug in a known good PCM. Hmphf! Santa did not put one in my stocking this year.
Do I trust the factory service manual for the diagnostics? Should I track down a salvage yard PCM? How much is a PCM? I was real happy that the instrument cluster was $90, but I could see on eBay that this was in line. I did not see many PCMs, plus how do I know which years work? The cluster was easy to match up at the salvage yard counter, but I do not know how to shop for a PCM.
I sure need an inspection sticker and have until 2-28-15 to get this fixed.
Thanks for reading!
Allen