Question about Oldsmobile Delta 88
Not only will it not enter diagnostic mode, it is not working as it will not shift into OD. I changed the ECM unit and it's still the same. The fuses are all good and the unit has power. What external signal can prevent the ECM from functioning?
The ECM is functioning but the problem is the way the data is being communicated to the scanner. There are several different procedures to follow when reading scanners so ensure that your connecting cables are right for you ECM and scanner.
Posted on Jun 08, 2014
Testimonial: "The check engine light is on all the time even when I short pin 1 AND 2 OR even when the ECM is unplugged? Could a bad or wrong PROM cause this problem? The engine runs too rich at times, however it does allow the AC to work."
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Posted on Jan 02, 2017
Code #42 on the 4Runner denotes a problem with the Vehicle Speed Sensor (VSS) circuit.
It means the ECM did not detect a signal from the VSS, above 2,200rpm....which might explain the speedo issue - Does your speedo play up, only when engine running above 2,200rpm or 2,700rpm?
Areas to check (in this order) are:
- Open (or short) in the VSS circuit
- faulty VSS sensor
- ECM fault within VSS circuit
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Posted on Jan 27, 2010
SOURCE: I am not getting a
The fuel pump relay is powered by a fusible link connected to the starter solenoid on the positive battery terminal. That fusible link feeds the 10 amp fuse near the relay. You can test the fusible links with a 12 volt test lamp. If the fusible link test okay check for an open circuit in the wire between the link and the 10 amp fuse. Hope this gets you fixed.
Posted on Jul 04, 2011
I would say to go to Autozone.com and register your vehicle for free wiring and fuse box diagrams.
Then do a dedicated search of the diagnostic plug to the ECM. There is also the possibility of a bad Torque converter.
There should be a pressure port the mechanic can test to see what the Torque converter is doing. Before the shift solenoids can work, they need pressure to turn the transmission. The Torque converter will likely not show up on an electric test, except for its Lockup device. The Torque Converter is simply a Hydraulic pump that needs to work for the transmission to turn normally.
Posted on Oct 21, 2012
SOURCE: 2003 cavalier turn signal fuse
The 10A TURN-B/U fuse in the instrument panel fuse block feeds the turn/hazard flasher and the back-up lamps. There could be a short in the flasher, the turn signal/multifunction switch, or the lamps/sockets. There also could be a short in the back-up lamp circuit
Posted on Oct 28, 2012
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