Question about 2000 Chevrolet Impala
What would cause the PCM module to show a "Current Gear" that is different from the IMS position? The IMS (TR) A/B/C/P values match the selector range but the resulting TR gear indication does not.
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Posted on Jan 02, 2017
There was a customer satisfaction recall for this issue, however if you are like me and most others it is of little help as they only extended coverage to 75,000 miles. Mine is still readable (barely) time to spend some $$ and get it fixed before long.
Posted on Jun 01, 2009
theres many different terms for it but it sounds to me like your cobalt went into "theft mode" (emergency mode, panic mode, etc.) your best bet would be to call the dealer and ask them how to "reset" your car.
Posted on Jan 27, 2010
SOURCE: I have a 1989 Chevy
I assume this is on the steering column. If so you are correct in assuming this is mechanical as that is actually controlled by a cable that is adjustable. Now, having said that, there are several different things that must be opened in order to make this adjustment and to be honest I don't remember all of them or the special tools needed to open some of them. I highly recommend you get the Haynes or Chilton's repair manual on your vehicle so you have the instructions handy to follow to open the column up and adjust this linkage without causing damage. There should be a screw type adjuster like you see on bicycle hand brakes to adjust the cable to show the correct location of the gear being selected.
Posted on Dec 10, 2010
SOURCE: 1991 Chevy Cheyenne 4.3L V6
The shift indicator on your vehicle is controlled by a small cable that wraps around the shifter yoke and is held on with a clip. If it does not move at all, there are two possible reasons for it. Either the cable has broken or the spring in the indicator end (in the instrument cluster) is broken. The spring is what makes it go one way, the cable makes it go the other way as it pulls against the spring.
The most likely howerver, is that the cable is broken.
If the cable has broken, I have had some luck fixing them by using an 18-22 Gauge wiring **** splicer. It all depends on exactly where the cable is broken. This will not work in all cases.
Posted on May 28, 2011
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The IPC detects a loss of serial data communications with the ECM. The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
The automatic transmission shift lock control solenoid
The automatic transmission shift lock control switch
With the ignition in the ON position, voltage is supplied to automatic transmission shift lock control switch. Voltage flows through the normally closed contacts of the automatic transmission shift lock control switch to the automatic transmission shift lock control solenoid. The automatic transmission shift lock control solenoid is permanently grounded. This energizes the automatic transmission shift lock control solenoid causing the transmission shift lever to be physically locked in the PARK position. When the brake pedal is pressed the contacts in the automatic transmission shift lock control switch open, de-energizing the automatic transmission shift lock control solenoid. This allows the shift lever to be move out of the PARK position.
The transmission range (TR) switch is part of the park/neutral position (PNP) and backup lamp switch assembly, which is externally mounted on the transmission manual shaft. The TR switch contains four internal switches that indicate the transmission gear range selector lever position. The PCM supplies ignition voltage to each switch circuit. As the gear range selector lever is moved, the state of each switch may change, causing the circuit to open or close. An open circuit or switch indicates a high voltage signal. A closed circuit or switch indicates a low voltage signal. The PCM detects the selected gear range by deciphering the combination of the voltage signals. The PCM compares the actual voltage combination of the switch signals to a TR switch combination chart stored in memory.
You need a Tech2 scan tool to diagnose this problem ! possible range sensor !
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