The purge valve is under the hood, but the vent valve and pressure sensor are part of the canister assembly, and that’s mounted underneath right next to the fuel tank.
That means EVAP codes are common on these models because the EVAP system is relatively complicated: It includes the charcoal canister with a pressure sensor, two solenoid valves and some sophisticated software. Fortunately that’s easily reached through the access panel under the rear seat.īy the way, Toyota OEM wiring diagrams are some of the most informative and user-friendly, and they often include notes about voltage, resistance and signal specs at the terminal connections.ĭespite the Camry’s reputation for reliability, this was the first generation designed to meet LEV II evaporative emissions regulations. This means you can’t really determine fuel pump voltage or current draw at the C/OPN relay socket, you’ll need to check it at the fuel pump connector itself. Depending on the model, the EFI relay provides power to the fuel pump (through the C/OPN relay) the EVAP purge valve (VSV) and/or an oxygen sensor heater. What’s different here is that power for the C/OPN relay contacts is supplied by the main electronic fuel injection (EFI) relay, and power for this relay coil is provided by the PCM. Like other cars, power for the relay coil comes from the ignition switch (through a 10-amp fuse), and the ground circuit is provided by the PCM when the ignition switch is in the START position or when engine speed is above cranking speed. Power for the fuel pump is supplied by what they call the circuit-opening relay (C/OPN), which any other manufacturer would simply call the fuel pump relay. The fuel injection system’s electrical circuit design is the same on all three engines, but it is uniquely Toyota. If fuel pressure falls below specification during a full-throttle acceleration, that means the fuel pump can’t keep up with the demand. One way to check fuel volume is to monitor fuel pressure during full-throttle acceleration. There is no fuel pump flow rate specification, and there’s no pressure tap on the fuel rail either. Specs for this fuel system are the same for all three engines: fuel pressure with the engine running or not running is 44 to 50 psi, hold pressure is 21 psi and fuel injector resistance is 11.6 to 12.4 ohms at 68 degrees Fahrenheit (20 degrees Celsius). Turbine pumps are not particularly strong on the suction side, so if there’s a no-start or driveability issue that’s caused by lack of fuel, the problem just might be nothing more than a clogged fuel filter. That includes the only fuel filter in the whole system, the strainer or “sock” on the inlet side of the pump.
Toyota camry 2005 battery pulse manual#
The fuel pump module is usually sold as a complete assembly, but according to the service manual each of those components can be replaced separately once the module is removed.
The mechanical pressure regulator is part of the fuel pump module that includes the pump, a reservoir, the gauge sending unit and a fuel filter. The fuel rail may have something that looks like a pressure regulator, but it’s actually a pulse damper to reduce pressure pulsation and fuel pump noise. The main difference is the fuel pressure regulator is inside the fuel tank instead of under the hood. Returnless fuel systems were developed to reduce evaporative emissions. That system architecture became the model for Toyota port fuel injected engines right up through current generation, including the other engines used in that car, the 3.0-liter 1MZ-FE and the 3.3-liter 3MZ-FE. The 2002-2006 model is the Camry’s fifth generation and the first year for the 2.4-liter 2AZ-FE engine with an electronic mass airflow sensor, electronic throttle and a returnless fuel injection system. If you don’t normally work on Toyotas, or if you simply haven’t had the opportunity to look into a Toyota fuel system lately, here’s a quick overview of the two most common models. When problems do arise, the diagnosis is rarely a challenge.īut diagnosis is always faster and more accurate when you know more about the vehicle. With normal maintenance or even a fair amount of neglect, it seems these cars almost never break down. market, the Toyota Camry has been one of the most reliable cars on the road. Since the day it was introduced to the U.S. He currently holds ASE Master Technician and L1 certifications and has participated in ASE test writing workshops.
Toyota camry 2005 battery pulse manuals#
His began his writing career writing service manuals at Chilton Book Co. Jacques Gordon has worked in the automotive industry for 40 years as a service technician, lab technician, trainer and technical writer.
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