Question about 2002 Toyota RAV4
It shifts fine and then all of a sudden it starts shifting erratic, the engine light comes on. Then it sticks in a high gear or alternatively it does not shift into the second gear which obviously causes hard / rough shifting. After diagnostics at Toyota SA the second shift solenoid was replaced. The problem persists. I did some research and it is clear that the ecm must be replaced. This was / is a problem on the 2001 to 2003 RAV4 auto cars. Where in South Africa can I get an ecm?
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Posted on Jan 02, 2017
I had the fuel pump recently replaced i just assumed the fuel filter was replaced also cause my fuel pump is in the gas tank. My air filter is clean and I have 4 fuel injectors, no carburetor. A friend of mine who has looked at my car for me says it sounds like there is some kind of air leak but can't figure out where it is coming from?
Posted on Oct 28, 2008
SOURCE: transmission slippage
The ECM (or, Electronic Control Module) is covered by the factory warranty for 96 months, or 80,000 miles, whichever comes first. Have your dealer refer to Toyota technical service bulletin "TC002-06" for info proving this. The fix is to replace the ECM. If you are below the above parameters, the repair should be free.
Also, if you have ever had your transmission fluids changed, it is CRITICAL that you use a specific auto transmission fluid, Toyota type "T-IV". Any other fluid will cause you problems. Please feel free to respond if you have any other questions; and Thnaks for choosing FixYa!
Posted on Nov 07, 2008
SOURCE: Hello, I own a 93
The transmission is controlled by the Transmission Control Unit (TCU).
Throttle position, rpm, and speed are input parameters to the TCU. The TCU has a default set of shift patterns. These shift patterns change over time based on your specific vehicle setup and driving habbits.
The shift patterns are only slightly affected by driving habbits over many driving cycles. But, changing the relationship between the throttle position and the actual speed being reported by the speed sensor can have an immediate effect on shift patterns.
While your speedo may now be correct, the realtionship between rpm and thottle position has not been corrected. That would take a gear change in the differentials.
The TCU can be reset to an inital learn base line. When this is done, the TCU will instantly learn the dynamics of your setup.
Any shop with an advanced ODB scan tool can reset the the TCU. The dealer or a transmission shop would be preferable.
You really should change your differential gears as opposed to resetting the TCU
This information was posted by ftgiles here
Posted on Jan 06, 2009
There is a Bulletin on this concern, and it is a warrantable condition for 8 years or 80,000 miles so you are still covered by the factory warranty.
The problem is a logic issue in the PCM. The correction is a new PCM with updated software.
Reference bulletin #TC015-07
The contents are below:
TRANSMISSION & CLUTCH
HARSH SHIFT AND M.I.L. "ON"
DTC P2716 Models:
'05 - '07 Corolla & Matrix (1ZZ-FE) September 20, 2007
Some 2005 - 2007 model year Corolla and Matrix vehicles equipped with an automatic transaxle may exhibit a harsh shift condition and a M.l.L. ON" with DTC P2716 stored.
Improvements have been made to the Engine Control Module (ECM) (SAE term:
Powertrain Control Module/PCM) to reduce the possibility of this condition occurring.
^ 2005 - 2007 model year Corolla and Matrix (2WD) vehicles equipped with the 1ZZ-FE engine.
This repair is covered under the Toyota Federal Emissions Warranty. This warranty is in effect for 96 months or 80,000 miles, whichever occurs first, from the vehicle's in-service date.
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Posted on Sep 21, 2009
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Dec 17, 2016 | 2002 Chevrolet TrailBlazer
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 !
Sep 03, 2015 | Cars & Trucks
The automatic transmission shift lock control switch
Can you or can you not take it out of park ?
Shift Lever Does Not Move with Brake Pedal Depressed
yes or no ?
The instrument panel cluster (IPC) displays the selected gear position as determined by the engine control module (ECM). The IPC receives a serial data message from the ECM indicating the gear position. The PRND321 display blanks if:
The ECM detects a malfunction in the transmission range switch circuit.
The IPC detects a loss of serial data communications with the ECM.
You have a transmission range sensor or PCM problem , Need a professional grade scan tool to diagnose the problem , well that would be the easiest way to test .You should have all modules test for DTC'S - diagnostic trouble codes ! That would point you in the right direction ! I would suggest you google class 2 serial data communication network !
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