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How to solve error code p1603 on toyota mark x?

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Posted on Jan 02, 2017

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SOURCE: P1603 Battery Backup Error

There is a power supply to the ecu that is missing either permanantly or interrmitently, it may be as simple as a fuse, or it may have a bad connection in a loom plug or a broken wire...

Posted on Oct 12, 2008

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What are the probable causes of DTCs P1603, P1604, and P1605?


OBD-II code P1603 indicates an issue with TCU communication.
There are communications that exist between the engine control module, or ECM, and the transaxle control module, or TCM. This communication is done through a control area network, or CAN. With the communication of the CAN, an independent pin and wiring is needed to receive a signal that includes sensor information from the ECM. The more information there is to communicate, the more wiring that is needed. When it comes to CAN communication, all of the information communicated is done alone control modules like the ECM and TCM using CAN lines. When there is a problem with these lines, the ECM will detect the problem and store a P1603 trouble code; the storing of the trouble code is what causes the SES or check engine light to illuminate on the dash.
Possible causes of trouble code P1603 include:
  • Faulty transaxle control module (TCM)
  • Faulty engine control module (ECM)
  • Harness running from the TCM to the ECM has a short
  • There is a poor electrical connection between the TCM and ECM
Diagnosing the exact cause of the problem should always begin with a visual inspection that could reveal bad wiring, loose connections, or damaged parts. From there, it is a matter of running down the list to determine what needs to be replaced. In general, a bad ECM will cause a loss of power, poor fuel economy, and stalling engine. While a bad TCM will have more prevalent transaxle issues like erratic shifting
P1605 and P1605
These codes are indicating a starting problem and rough idling. Code p1604 is a very vague code and diagnosing it without having a symptom is very complicated. And code p1605 is rough idling which means that the computer have noticed a rough idle situation usually this code is accompanied by other codes or if it's alone then I would suspect a fuel pressure issue. These two codes involve diagnosis and we'll need to dig into this problem deeper to find out what's causing them, Unless you are an experienced technician who need assistance then I will suggest that you take your vehicle to your local toyota dealership and they should be able to find the problem.
P1P

Feb 12, 2016 | 2011 Toyota Sienna

1 Answer

What are problem for engine toyota estima acr 50 code P1603,P1604 & P1605


Its a computer related problem and you will need to take the car to Toyota service for further analysis.

Jan 13, 2016 | Toyota Cars & Trucks

1 Answer

What is the meaning of code P1603 kindly give us


P1603 - EEPROM Malfunction
Possible symptoms: Engine Light ON (or Service Engine Soon Warning Light).
P1603 Information for specific makes P1603 BUICK
P1603 CADILLAC
P1603 CHEVROLET
P1603 GMC
P1603 HYUNDAI
P1603 KIA
P1603 EEPROM Malfunction

May 31, 2015 | Cars & Trucks

2 Answers

P1603


Have to Google all Vehicle Codes
OBD P1603

Jul 19, 2013 | Toyota HiAce Cars & Trucks

1 Answer

I have toyota vitz with P1603 trouble code, what should i do to solve problem?


Diagnostic Trouble Code Table can help you to check the trouble code when you diagnose your car with OBDII diagnostic tools.

Aug 27, 2011 | Toyota Yaris Cars & Trucks

5 Answers

P1603 ECM/PCM TOYOTA vitz


this is an obd2 trouble code table ,it can help you understand the meaning of code.

Aug 08, 2011 | Toyota Yaris Cars & Trucks

3 Answers

I want to have a manual for toyota vitz year 2007, of 999cc


Do a Google search ( want to have a manual for toyota vitz year 2007, of 999cc ) and see what comes up

Mar 13, 2011 | Toyota Yaris Cars & Trucks

1 Answer

P1603 Battery Backup Error


There is a power supply to the ecu that is missing either permanantly or interrmitently, it may be as simple as a fuse, or it may have a bad connection in a loom plug or a broken wire...

Oct 10, 2008 | 2001 Mitsubishi Galant

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