STAR Service News Missed an issue? - Toyota Parts & Service

More documents

Recommendations

Info

TOYOTA TECHNICAL The EPS motor, torque sensor and motor rotation angle sensor are built into the steering column. The Electronic Power Steering ECU is secured to the cowl with three studs and nuts. ELECTRONIC POWER STEERING SYSTEM PRECAUTIONS When handling the electronic parts, avoid any impact to parts such as ECUs and relays. Replace with new if dropped or subjected to a severe blow. Do not expose any electronic parts to high temperatures and humidity. Do not touch the connector terminals, in order to prevent malfunctions due to static electricity. When handling the steering column assembly, avoid any impact to the steering column assembly, especially the motor and torque sensor. Replace with new (motor and/ or torque sensor) if dropped or subjected to a severe blow. When disconnecting and reconnecting the electronic steering system connectors, turn the ignition switch to the ON position, center the steering wheel, turn the ignition OFF, and then disconnect the sensors. PRECAUTIONS FOR CAN COMMUNICATION High-speed CAN communication lines are used to The torque sensor detects the amount of torque applied to the torsion bar by the steering wheel. receive information from the skid control ECU and the ECM, and to transmit warnings to the combination meter. When any problems arise in the CAN communication lines, DTCs of the CAN communication line are output. Perform troubleshooting for communication line problems when the CAN communication DTCs are output. Be sure to start troubleshooting on the electronic power steering system after confi rming that the CAN communication system is functioning normally. Since the CAN communication line features its own length and route, it cannot be repaired with a bypass wire, etc. INSPECTING THE TORQUE SENSOR With torque sensor connector connected (where DTCs are indicated), turn the ignition switch ON. Measure the voltage at the EPS ECU at the appropriate ECU terminals. If the specifi cations are not met, replace the steering column assembly. Locations of the EPS ECU terminals for checking torque sensor voltage conditions. 16 STAR Service News Spring 2010
Like the 2007 Rav4, the 2007 Toyota Yaris is equipped with Electronic Power Steering (EPS). CAUTION: Since the steering column includes an airbag system, care must be taken to avoid damaging the SRS (Safety Restraint System). Refer to the Toyota Repair Manual section RM000000KT1020X for SRS precautions. TESTER CONNECTIONS: 6 (TRQ1) - 1 (TRQG) Condition: Steering wheel not turned (without load). Specifi ed condition: 2.3 to 2.7V Condition: Steering wheel turned to right with vehicle stopped. Specifi ed condition: 2.5 to 4.04V Condition: Steering wheel turned to left with vehicle stopped. Item Item description: Range (display) MTR TERMINAL (U) MTR TERMINAL (V) MTR TERMINAL (W) Motor terminal voltage (U phase): Min.: 0 V Max.: 46.667 V Motor terminal voltage (V phase): Min.: 0 V Max.: 46.667 V Motor terminal voltage (W phase): Min.: 0 V Max.: 46.667 V Spring 2010 STAR Service News TOYOTA TECHNICAL Inspection condition Reference value Engine running and steering wheel turned. Engine running and steering wheel turned Engine running and steering wheel turned When the steering wheel is turned, a voltage between 1 V and approximately 1 V less than the battery voltage is displayed When the steering wheel is turned, a voltage between 1 V and approximately 1 V less than the battery voltage is displayed. When the steering wheel is turned, a voltage between 1 V and approximately 1 V less than the battery voltage is displayed. Result Proceed to When the steering wheel is turned, a voltage between 1 V and A approximately 1 V less than the battery voltage is displayed. When the steering wheel is turned, a value other than the above B is displayed B - Replace steering column assembly A - Replace the power steering ECU 17
Page 1 and 2: Spring 2010 In this issue: Battery
Page 3 and 4: Persistence pays off! I was recentl
Page 5 and 6: BATTERY COMPARISON Diff erences bet
Page 7 and 8: Select MODEL and press the NEXT sof
Page 9 and 10: drawn from the battery under high l
Page 11 and 12: STARTER MOTOR CIRCUIT As an example
Page 13 and 14: STAR Service News BACK ISSUES Issue
Page 15: The 2007 Rav4 (and 2007 Yaris) is e
Page 19 and 20: While driving, steering eff ort doe
Page 21 and 22: A reciprocal shock absorber system
Page 23 and 24: The shock absorbers are plumbed for
Page 25 and 26: TOYOTA TECHNICAL A height control r
Page 27 and 28: TESTER CONNECTION TESTER CONNECTION
Page 29 and 30: SUSPECTED AREA: • Power source ci
Page 31 and 32: ment and drive new and used car buy
Page 33 and 34: Putnam Toyota Burlingame CA 650-340
Page 35 and 36: Down East Toyota Brewer ME 207-989-
Page 37 and 38: Jim Norton Toyota Tulsa OK 918-254-

STAR Service News Missed an issue? - Toyota Parts & Service

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?