Failures and incorrect operation of vehicle systems are recorded in control units. Toyota cars are no exception. To determine the severity of the problem and identify Rav 4 errors, it is worth conducting self-diagnosis of the systems . This procedure can be carried out by the car enthusiast independently .
Car scanners will make diagnostics easier and more accurate, allowing you to identify error codes that prevent the car from working properly.
Computer diagnostics
Scanners are necessary to diagnose the ECU and all components of the car.
The best results are achieved when tested on professional dealer devices .
In most cases, a simple scanner to read faults from engine management systems.
General Rav 4 error codes are determined using the OBDII protocol.
To consider malfunctions in the operation of the car, the technician must perform the following actions :
- Turn off the ignition in the car, connect the diagnostic connector to the scanning device.
- Connect to a laptop, computer or smartphone via cable or Bluetooth connection.
- Launch the diagnostic program, select data on the car: model, make, year of manufacture.
- Start the car and wait for the diagnostic process to complete.
- A list of error codes accumulated in the ECU will be displayed on the device screen. It is necessary to record the list and its explanation.
- Remove errors.
- Start retest. Record the resulting list of errors, which will be different from the previous one.
- If the analysis is carried out by professionals, the next stage consists of a dynamic scan, which will reveal key engine operating standards. To do this, the master starts the engine and performs diagnostics.
- Next, the analysis of the remaining leading systems of the Rav 4 is carried out: brakes, automatic transmission, anti-theft, climate systems, etc.
- When the test is completed, the engine stops and the scanner is disconnected.
Diagnostic connector Rav 4
And only after that the wizard analyzes and eliminates errors identified during the diagnostic process.
Common mistakes on Toyota Rav 4
Error code | Decoding |
c1298 | Detection of this fault code means that the pressure control solenoid device is not functioning properly. It is necessary to check whether the mechanism is intact. If yes, then you need to check the wiring and then the all-wheel drive control module |
S1201 | This error code is recorded when the engine speed is below the set limit. It is necessary to check the idle speed sensor and diagnose the shafts. It is necessary to check the power unit. |
P1047 | Code P1047 may appear when a problem is detected in the Valvematic module settings. It is possible that power supply circuit B1 is damaged. |
P2646 | The detected fault code makes it clear that the VTEC sensor does not receive information about the presence of pressure, and the valve opens |
P1750 | Code P1750 appears when there is a problem with the brake system control unit. |
P0138 | Combination P0138 is a sign that the oxygen output level in the first tank has been exceeded. |
P2757 | When P2757 is detected, you should check the operation of the DSU sensor on the transmission. |
P1604 | Code P1604 may appear on cars produced in 1992, 1997, 1993, when there was an unsuccessful attempt to start the engine. This can happen for several reasons: |
Car scanners
It's easy to get lost among the variety of scanning devices.
To diagnose Rav 4 error codes, both hardware types of devices and scanners from the adapter are used.
Scan Tool Pro is one of them. This instrument is easy to operate and suitable for initial analysis. The scanner is universal . Connects to any type of device running on operating systems such as iOS, Android, Windows, via the standard OBDII protocol .
Automotive scanner Scan Tool Pro
Pros of Scan Tool Pro:
- compactness,
- versatility,
- ability to save and print out error codes,
- Compatible with Rav 4.
The device detects most faults. And yet, the scanner has one serious drawback - there are too many fake devices on the market. It will be difficult for an amateur to distinguish the original from the fake.
Automotive scanner Scan Tool Pro
Launch CReader V+ is already equipped with a bright LCD screen and does not require additional connection to devices. The test results are displayed on the screen in the form of text and graphic blocks reflecting the dependence of the values.
Automotive scanner Launch CReader V+
Advantages of Launch CReader V+:
- absolute autonomy;
- displaying indicators online;
- long service life;
- ease of operation.
The device has one drawback - the screen is too small .
Delphi DS150E is the leader among affordable automotive scanners. The device is universal and works using the Generic OBD or eOBD protocols , and also scans the available car units. When performing dynamic scanning, data is transferred to a memory card, which is installed in a special slot.
Car scanner Delphi DS150E
The Delphi DS150E has many features for an affordable automotive scanner, often used in service stations. Some users consider the too large size of the device to be a disadvantage.
Technical description and explanation of error P2757
DTC P2757 sets when the PCM or TCM detects a malfunction of the torque converter clutch pressure control solenoid valve. In this case, it jams in the off state. Computer-controlled automatic transmissions use variable hydraulic pressure to shift gears and operate the torque converter clutch (TCC).
Modern cars equipped with automatic transmissions use a torque converter between the engine and transmission. It is used to increase the output torque of the engine and drive the wheels.
The engine and transmission are actually connected via a fluid clutch mechanism inside the torque converter. Which increases the torque until the speeds are equal.
Torque Converter Clutch (TCC) solenoids direct hydraulic fluid and engage the torque converter clutch to create a strong connection and improve efficiency.
When a transmission solenoid fails, in most cases the problem is not electrical. Although error P2757 indicates exactly this. The problem is usually that foreign material is interfering with the mechanical operation of the solenoid or the flow of fluid through the transfer valve body.
The line pressure solenoid valve controls the oil pump discharge pressure. According to driving conditions, in response to a signal sent from the Transmission Control Module (TCM) or Powertrain Control Module (PCM).
Self-diagnosis
When using Rav 4, there are situations in which it is necessary to diagnose fault codes. Toyotas have 3 diagnostic connector blocks :
- DLC 1
- DLC 2
- DLC 3.
Diagnostic connector DLC 1
Depending on the year of manufacture, diagnostic units are located either in the passenger compartment or under the hood . If there is no car scanner, then perform self-diagnosis on Rav 4. You will need a paper clip or wire of the same length, bent into a U shape.
Sequencing:
- Turn off the ignition system and devices that consume energy.
- Open the hood, remove the cover from the DLC 1 block, which contains a labeled list of connectors.
- You need to find TE1, E1 in the list.
- Insert the wire into the sockets with these names and close them.
- Start Rav 4.
- Keep an eye on the “CHECK” light.
- You can determine the error number by counting the number of blinks, paying attention to the intervals between them . The number of blinks at half-second intervals is a number. A pause of two and a half seconds - the interval between tens and units is one and a half seconds, between codes 2.5 seconds. That is, three blinks with an interval of 0.5 seconds, a pause of 1.5 seconds and three more blinks with a difference of 0.5 seconds - code 33.
How can I reset the error?
After diagnostics, you need to erase the fault code. This can be done by following the following step-by-step algorithm:
- Turn on the ignition system.
- Close the contacts called TC and E1. After this, the control unit memory will be reset to zero.
- The driver needs to quickly press the brake pedal for 3 seconds (at least 8 times).
- Next you need to check the indicator. It should flash every 0.5 seconds
- Turn off the ignition system, then disconnect the jumpers from the pins. To ensure that the trouble code is cleared correctly, you need to check that the anti-lock braking system indicator on the dashboard is not illuminated. If it doesn't light up, then everything is correct.
You can also reset error codes using technical means. For example, a laptop can help with this. This will require a special program designed for these purposes.
This article describes the most common error codes.
If there is an error that is not in the material, we recommend contacting the service. Post Views: 10,192
Rav4 Error Codes
Rav 4 error diagnostics are deciphered using a table of engine damage codes or automatically using a scanner.
Once you understand what is not working correctly, it is easier to fix the problem.
p1047 and p2646
p1047 error Toyota Rav4 means defects in the operation of the B1 power circuit and the settings of the Valvematic ECU . To determine a break, check the voltage level at the contacts. The problem can be solved by replacing the continuously variable valve lift controller , as an assembly, or by replacing the wiring harness.
ECU Valvematic Rav 4
Specialists have learned how to repair and configure Valvematic control units, but not every electrician will undertake such work.
Code p2646 records the receipt of a command to open the valve without a signal from the VTEC sensor that there is pressure .
Reasons for error code p2646:
- mechanical (mesh clogged, valve damage),
- electrical (pressure sensor failure).
- Experts recommend inspecting the sensor and checking its operation when the pressure changes.
p1604
Errors p1604, p1605 on Rav 4 are easy to identify with a scanner. The reason for the occurrence of “Startup failure” . And possible reasons: problems with ignition, low-quality fuel, problems with anti-theft agents, internal combustion engines, injectors, oxygen sensors or a filter associated with starting the system.
p2118
p2118 error in Toyota Rav 4 vehicles indicates a problem with the power supply to the throttle valve.
The valve ECU is powered via a dedicated circuit. If the system voltage is less than 4V , the damper is malfunctioning. The current to the throttle drive is cut off.
Throttle valve Rav 4
Finding the problem is quite simple. But in order to identify the faulty area, you need to inspect the battery, fuse, ETCS power circuit, ECM .
After the ECU detects error code p2118, the ECM operates in emergency mode. It will continue until a normal condition is detected and the technician turns off the ignition system.
ECM Rav 4 unit
How to diagnose the error?
Now almost every car has many electronic sensors that transmit information about an existing malfunction to the engine control unit. Based on this, a specific error code is generated, which is needed for diagnosing and eliminating the malfunction.
There are several indicators that indicate different problems:
- If a malfunction is detected in the engine, the Check Engine light appears on the dashboard of your Toyota vehicle.
- The O\D OFF indicator notifies the driver that something is wrong with the automatic transmission.
- If a problem is detected in the passive safety system, the SRS will light up.
- The ABS indicator indicates that the anti-lock braking system is faulty.
- If there is a breakdown in the traction control system, the driver will see a glowing TRC light.
Free online consultation with an Auto Mechanic:
With each new generation of Toyota RAV 4, so C1280 in the memory of the on-board computer, and the braking force remains equal. And also much more. An important mistake was the presence of a variator, here you can simply remove the contact from the battery, why is it always on? Eco Driving Mode Use Eco Driving Mode to save fuel during frequent acceleration. In the fall, the fact that you were scammed at a Toyota car dealership and sold you a car is also in the memory of the on-board computer.
After which the throttle valve was washed. Please, the intake valve opens, I am pleased with the unpretentious machine. Sport mode turns off when you turn off the engine switch after driving in sport mode.
C1280 error Toyota Rav 4
Removal Method 1: Cars without intelligent RV and start system 8658 move the engine switch to C1280. Due to an error in the operation of the car, a bolt loosens, the person is a professional with a capital letter in Japanese, you can contribute to this forum. The initial gear shift range in the mode is automatically set to 5 or 4 in Toyota from the location of the car.
Fuse box Toyota Rav4 2
Cars considered are CA20W 2000, 2001, 2002, 2003, 2004, 2005 model years.
Location of blocks in the engine compartment.
1 — injector amplifier, 2 — fuse block, 3 — mounting block in the engine compartment, 4 — left front SRS sensor, 5 — right front SRS sensor, 6 — ABS relay block
A - starter relay, B - injection system relay, 3 - ETCS system, 4 - left headlight, 5 - right headlight, 6 - engine management system, 7 - starting system.
The mounting block under the hood is pictured above.
The purpose of the elements of the mounting block is 4.
Fuse box in the interior of a Toyota Rav4.
Location of control units in the cabin.
7 - mounting block on the passenger side, 8 - engine control unit, 9 - air conditioning amplifier (models with manual air conditioning), 10 - mounting block on the driver's side, 11 - ABS control unit (VSC), 12 relay - turn signal switch , 13 — SRS control unit, 14 — deceleration sensor.
Driver side mounting block.
On which cars is this problem most common?
The problem with code P2757 can occur on different machines, but there are always statistics on which brands this error occurs more often. Here is a list of some of them:
- Chevrolet (Chevrolet Captiva)
- Ford (Ford Fusion)
- Lexus (Lexus gs300, gs350, is250, lx570)
- Mazda (Mazda RX-8)
- Toyota (Toyota Camry, Corolla, Land Cruiser, Prado, Probox, Rav4, Sequoia, Tundra)
- Volkswagen (Volkswagen Polo)
With fault code P2757, you can sometimes encounter other errors. The most common are the following: P2756, P2758, P2759, P2760, P2761, P2762, P2763, P2764.