A thermistor built into the engine coolant temperature sensor changes the resistance value according to the engine coolant temperature. The structure of the sensor and connection to the ECM is the same as in the intake air temp. circuit malfunction shown on page DI-26 . If the ECM detects the DTC P0115, it operates the fail-safe function in which the engine coolant temp. is assumed to be 80°C (176°F).
HINT: After confirming DTC P0115 use the OBD II scan tool or TOYOTA hand-held tester to confirm the engine coolant temperature from ”CURRENT DATA”.
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This bulletin outlines procedures and methods to isolate the cause(s) of mixture related driveability incidents. The bulletin also covers incidents where the check engine light is illuminated and code 45 is stored, but there are no driveability symptoms.
SERVICE PROCEDURE
NOTE: • ANY SENSOR INPUT THAT CAN CAUSE A “RICH” FUEL SIGNAL CAN CAUSE AN INJECTOR LEAK CODE. • ANY CAUSE FOR EXCESSIVE FUEL PRESSURE CAN CAUSE AN INJECTOR LEAK CODE. The best way to resolve a Code 45 or driveability incident is to carefully go through ALL the following steps: 1. CONSULT ALPHA TEST 2. MASS AIR FLOW SENSOR TEST 3. FUEL PRESSURE REGULATOR TEST 4. INJECTOR LEAK DOWN TEST 5. ENGINE COOLANT TEMPERATURE SENSOR TEST 6. OXYGEN (O2) SENSOR TEST 7. QUALITY CONTROL CHECK
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You AC should be cooling more effectively than that on MaxAC − I’d take it back and get the pressure checked to ensure you don’t have a leak. Something is funny about your problem though as MaxAC should work even with a bad blend door. MaxAC opens the recirculating air damper, shuts off the flow to the heater core and cranks the AC so you should get full cooling. If you look on this picture below you will see how it all is setup − the blend door is in the middle and controls air flow around the heater core after the AC evaporator. If the heater core is off then you should still get full cooling even if the blend door is wonky.
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In late 1995, six months after Toyota decided to move forward with its revolutionary hybrid, the Prius, and two years before the car was supposed to go into production in Japan, the engineers working on the project had a problem. A big problem. The first prototypes wouldn’t start. “On the computer the hybrid power system worked very well,” says Satoshi Ogiso, the team’s chief power train engineer. “But simulation is different from seeing if the actual part can work.” It took Ogiso and his team more than a month to fix the software and electrical problems that kept the Prius stationary. Then, when they finally got it started, the car motored only a few hundred yards down the test track before coming to a stop.
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By a built-in sensor unit, the manifold absolute pressure sensor detects the intake manifold pressure as a voltage. The ECM then determines the basic injection duration and basic injection advance angle based on this voltage. Since the manifold absolute pressure sensor does not use the atmospheric pressure as a criterion, but senses the absolute pressure inside the intake manifold (the pressure in proportion to the present absolute vacuum 0), it is not influenced by fluctuations in the atmospheric pressure due to high altitude and other factors. This permits it to control the air-fuel ratio at the proper lever under all conditions.
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This article contains underhood views or schematics of vacuum hose routing. Use these vacuum diagrams during the visual inspection in F – BASIC TESTING. This will assist in identifying improperly routed vacuum hoses which cause driveability and/or computer-indicated malfunctions.
1991 ENGINE PERFORMANCE Vacuum Diagrams Camry, Celica, Corolla, Cressida, Land Cruiser, MR2, Pickup, Previa, Supra, Tercel, 4Runner.
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More than eight decades have passed since Sakichi Toyoda’s automatic loom revolutionised the Japanese textile industry in 1924. Since then, Toyota has helped transform manufacturing industry around the world – from textile machinery and automobiles to electronics and materials handling equipment. Today, the Toyota Group employs more than 700,000 people worldwide and is one of the largest and most respected corporations in the world. Reflecting the diversity of its activities, the group encompasses 13 corporations, including Toyota Motor Corporation (TMC) and Toyota Industries Corporation (TICO).
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Tests/Procedures: 1. Ground the Violet/Yellow wire (disarm circuit) that goes to either front door and the theft alarm module. Have the keys out of the ignition and all doors closed when grounding the wire. This should disarm the theft alarm system and prevent the theft alarm from arming. 2. Check that the interior lights do not stay on due to the wire being grounded. If they do, the illuminated entry relay will need to be removed or another method of disabling the theft alarm will have to be used. 3. Another method if the theft alarm module is faulty would be to disconnect the module and replace the Powertrain Control Module (PCM) with a new one.
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Powerchip technology enhances your Toyota to its ultimate level, delivering faster, smoother acceleration in all driving conditions. Whether you enjoy a leisurely weekend cruise or a hard racetrack drive – there is no easier and more effective way to release the potential from your Celica SX,ZR 2.2. The following information is an overview of the performance the Powerchip will deliver. If you have any questions, your Power Consultant will assist you as best as possible. We look forward to giving you the best performance possible from your Toyota.
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Subject: Starter motor Failure
Model: Ford 2.0 TDCI FWD & 2.4 TDCi RWD/2.0 TDCi FWD
On inspection, the units do not exhibit any manufacturing defects. The premature failure of the unit is due to contamination of the pinion/drive area from metal dust particles produced within the Dual-mass Flywheel, when the clutch wears or becomes overheated. During scheduled servicing, it is recommended that the clutch is checked and if found to be showing signs of wear should be replaced.
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