DIAGNOSTICS DTC C00/33 RIGHT REAR SPEED SENSOR 05795 05H3B03 DTC C05/34 LEFT REAR SPEED SENSOR DTC C38/38 FOREIGN MATTER IS ATTACHED ON TIP OF RIGHT REAR SENSOR DTC C39/39 FOREIGN MATTER IS ATTACHED ON TIP OF LEFT REAR SENSOR CIRCUIT DESCRIPTION Refer to DTC C000/3, C005/3, C35/35, C36/36 on page 05788. DTC No. DTC Detecting Condition Trouble Area C00/33 C05/34 () All the following conditions continues for at least second. Vehicle speed is more than 6 mph (0 km/h). Open or short in vehicle speed sensor signal circuit of faulty wheel continues for second or more. () Momentary interruption of the sensor signal of faulty wheel has occurred 7 times or more. (3) Sensor signal circuit is open for 0.5 seconds. Right rear and left rear speed sensor Each speed sensor circuit Sensor rotor Sensor installation C38/38 C39/39 All the following conditions for at least 5 seconds. Vehicle speed is more than mph (0 km/h). Vehicle speed sensor signal receives. DTC C00/33 and C38/38 are for the right rear speed sensor. DTC C05/34 and C39/39 are for the left rear speed sensor. WIRI DIAGRAM Right rear and left rear speed sensor Each speed sensor Sensor installation Skid Control ECU with Actuator A4 ABS Speed Sensor Rear LH V R IA IA O Y 6 IC 7 IC G YG 6 S7 0 S7 RL RL+ 5 9 P R BR IO IC S7 A5 ABS Speed Sensor Rear RH 6 5 GR L Y IO IC S7 RR RR+ F463 985
05796 DIAGNOSTICS INSPECTION PROCEDURE Start the inspection from step when using the handheld tester and start from step 3 when not using the handheld tester. READ VALUE OF HANDHELD TESTER(REAR SPEED SENSOR) (a) Connect the handheld tester to the DLC3. (b) Start the engine. (c) Select the DATA LIST mode on the handheld tester. (d) Check that there is no difference between the speed value output from the speed sensor displayed by the handheld tester and the speed value displayed on the speedometer when driving the vehicle. Item Measurement Item / Range (Display) Normal Condition WHEEL SPD RL Wheel speed sensor (RL) reading / min.: 0 km/h (0 MPH, max.: 36 km/h Actual wheel speed (0 MPH) WHEEL SPD RR Wheel speed sensor (RR) reading / min.: 0 km/h (0 MPH, max.: 36 km/h Actual wheel speed (0 MPH) : There is almost no difference in the displayed speed value. There is tolerance of ± 0 % in the speedometer indication. Go to step 3 INSPECT SPEED SENSOR AND SENSOR ROTOR SERRATIONS Normal Signal Waveform m/s / Division V / Division GND W0400 INSPECTION USI OSCILLOSCOPE (a) Connect the oscilloscope to terminals RR+ RR or RL+ RL of the skid control ECU. (b) Drive the vehicle at approximately 9 mph (30 km/h), and check the signal waveform. : A waveform as shown in a figure should be output. As the vehicle speed (wheel revolution speed) increases, a cycle of the waveform narrows and the fluctuation in the output voltage becomes greater. When noise is identified in the waveform on the oscilloscope, error signals are generated due to the speed sensor rotor s scratches, looseness or foreign matter attached to it. Go to step 6 REPLACE REAR SPEED SENSOR (SEE PAGE 337 ) 986
DIAGNOSTICS 05797 3 INSPECT REAR SPEED SENSOR Rear Speed Sensor Connector A F4836 Connector B F080 WD: (a) Disconnect the skid control sensor connector. (b) (c) 0.9 to. kω Body ground 0 kω or higher Body ground 0 kω or higher WD: Skid control sensor subwire harness: (a) Remove the seat cushion and seatback. (b) Make sure that there is no looseness at the connector s locking part and connecting part of the connector. (c) Measure the resistance between terminal of connector A and terminal of connector B. (d) Measure the resistance between terminal of connector A and terminal of connector B. (e) A B Ω or less A B Ω or less Measure resistance between terminals and of speed sensor connector A and body ground. Body ground 0 kω or higher Body ground 0 kω or higher 987
05798 DIAGNOSTICS R405 (a) Disconnect the rear speed sensor connector. (b) (c) 0.9 to.3 kω at 5 C Body ground 0 kω or higher Body ground 0 kω or higher NOTICE: Check the speed sensor signal after replacement (see page 05765 ). REPLACE REAR SPEED SENSOR (SEE PAGE 337 ) 4 CHECK HARNESS AND CONNECTOR(REAR SPEED SENSOR SKID CONTROL ECU) Skid Control ECU S7 (harness side connector) RR+ RL RR RL+ Skid Control Sensor (harness side connector) A4 A5 (a) (b) Disconnect the skid control ECU connector and the skid control sensor connector. LH: S70 (RL+) A4 (RL+) Below Ω S76 (RL) A4 (RL) Below Ω RH: S75 (RR+) A5 (RR+) Below Ω RL RL+ RR RR+ G64 (c) S79 (RR) A5 (RR) Below Ω LH: S70 (RL+) Body ground 0 kω or higher S76 (RL) Body ground 0 kω or higher RH: S75 (RR+) Body ground 0 kω or higher S79 (RR) Body ground 0 kω or higher 988
DIAGNOSTICS 05799 REPAIR OR REPLACE HARNESS OR CONNECTOR 5 INSPECT SPEED SENSOR AND SENSOR ROTOR SERRATIONS Normal Signal Waveform m/s / Division V / Division GND W0400 INSPECTION USI OSCILLOSCOPE (a) Connect the oscilloscope to terminals RR+ RR or RL+ RL of the skid control ECU. (b) Drive the vehicle at approximately 9 mph (30 km/h), and check the signal waveform. : A waveform as shown in a figure should be output. As the vehicle speed (wheel revolution speed) increases, a cycle of the waveform narrows and the fluctuation in the output voltage becomes greater. When noise is identified in the waveform on the oscilloscope, error signals are generated due to the speed sensor rotor s scratches, looseness or foreign matter attached to it. Go to step 6 REPLACE REAR SPEED SENSOR (SEE PAGE 34 (FF) OR 344 (4WD)) 989
05800 DIAGNOSTICS 6 INSPECT REAR SPEED SENSOR INSTALLATION Skid Control Sensor WD: (a) Check the sensor installation. : There is no clearance between the sensor and rear axle carrier. F078 8.0 N m (8 kgf cm,7 in. lbf) No Clearnace BR3795 (a) Check the speed sensor installation. : There is no clearance between the sensor and rear axle carrier. The installation bolt is tightened properly. Torque: 8.0 N m (8 kgf cm, 7 in. lbf) NOTICE: Check the speed sensor signal after replacement (see page 05765 ). REPLACE REAR SPEED SENSOR (SEE PAGE 34 (FF) OR 344 (4WD)) 990
DIAGNOSTICS 0580 7 INSPECT SPEED SENSOR ROTOR AND SENSOR TIP WD: (a) Remove the skid control sensor (see page 34 ). (b) Check the sensor tip. : No scratches or foreign matter on the sensor tip. (a) Remove the rear speed sensor (See page 344 ). (b) Check the sensor tip. : No scratches or foreign matter on the sensor tip. Sensor Rotor WD: (a) Check the sensor rotor serrations. : No scratches, missing teeth or foreign matter on the rotor. F08575 Sensor Rotor R00948 (a) Remove the rear drive shaft (See page 3045 ). (b) Check the sensor rotor serrations. : No scratches, missing teeth or foreign matter. If foreign matter is attached, remove it and after reassembling, check the output waveform. NOTICE: Check the speed sensor signal after the replacement (see page 05765 ). CLEAN OR REPLACE SPEED SENSOR AND SENSOR ROTOR SERRATIONS REPLACE ABS & TRACTION ACTUATOR ASSY (SEE PAGE 337 ) 99