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The small display screen is renowned for this fault. Press on the plastic surround/bezel and see if the display shows any sign of life. It appears to be either a soldered joint or circuit board problem. I would doubt that replacing the radio will fix the fault, and at a bet, buying a replacement unit will be expensive and probably only result in the fault returning. Never know - there may be someone who has managed to work out a permanent fix for it...
Hi there:DTC P1447 - Diagnostic Module Tank Leakage (DM-TL) Pump Too High During Switching.
I suspect the main problem is the alternator. When the alternator is failing it can be intermittent (ok some times and then stops). The battery on a vehicle is there to turn the starter and as a buffer for the engines electrical system. When the alternator stops charging with the engine running the overall voltage of the electrical system cannot be handled by the battery and systems will start to shut down like the radio and wipers until the vehicle stalls. Then in some cases you can still restart, the alternator kicks back in and everything looks normal.If you are familiar with checking voltages, to check this with a volt meter, you would want to see 13 volts to 14.5 with the engine running (alternator charging). If you see less than 13 volts the alternator is not charging. If you want to make sure you can have the faults read at the dealer and they should see undervoltage faults that have set when the alternator had stopped charging. Also, to check yourself, when the problem is occuring you can use a volt meter to check the voltage at the jump terminal to see what the output of the alternator is. This would even set the ****** malfunction due to an undervoltage and the system would go into failsafe.
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Check your battery and voltge when car is running if les than 12 when off than battery is flat, if less than 14 when running then it's not charging like it should. If its charging ok and battery under 12 you need to replace battery. If its not charging ok than it's alternator- Hope i helped!
2. Press and hold odometer button and turn key to 1 or acc. position.
3. Keep button pressed until any of the following words appear in display: "oil service" or "inspection", with "reset" or "re". For vehicles with "high cluster", the fuel amount remaining until next service is displayed.
4. Press and hold button again until "reset" or "re" flash. If there is no "flash", minimum consumption value has not been met.
5. While display is flashing, press button briefly to reset service interval indicator. After display has shown new interval, the following will appear in display for approx. 2 seconds:"END SIA"
Sounds to me like a voltage regulator issue. This is attached to the alternator and monitors how much voltage is sent back to the battery. Any decent parts store should be able to hook up a charging system tool-most common is a Vat-40 and check the system. And they will probably do it for free. If there is an issue with the charging system, then try the voltage regulator first, as opposed to the alternator-there is quite a price difference I assure you. Let me know what you find.
The same thing happened to me and it turned out to be the alternator. Need to replace your alternator. Easy check, start the car and check the DC voltage of the battery, with the car running you should read around 14 volts. If you are reading 12-12.25 volts then the alternator is not generating.
Regarding the first problem, there is possibly an oil level sensor issue or vehicle version coding issue(both can be more fully checked at a dealership). The second problem is not uncommon. Obviously, there could be a low voltage if the vehicle sits for a long time or is not driven alot. Sounds like the ac system lost synchronization due to lack of voltage. With vehicle running, you should be able to press and hold recirc/rest or recirc/defrost buttons on ac control panel(can't quite remember which combination). Press and hold until leds start flashing, then the ac system will go through a resynch phase. If it completes this and the led's stop flashing, then it's ok. If it does not and the led's flash very quickly, this indicates an actual malfunction of ac system adjustment motors.