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Dynamic Stability Control System: Removal & Installation Mazda RX-8 I

Anti-Lock/traction Control 12 illustrations ~652 words

DSC HU/CM REMOVAL/INSTALLATION

CAUTIONWhen replacing the DSC HU/CM with a new one, configuration procedure must be performed before removing the DSC HU/CM. If configuration is not completed before removing the DSC HU/CM, DTC B2477 will be detected. The DSC may not function normally when the DSC HU/CM is replaced. After installation, always perform the initialization procedures for the combined sensor and the steering angle sensor. (See COMBINED SENSOR INITIALIZATION PROCEDURE .) (See STEERING ANGLE SENSOR INITIALIZATION PROCEDURE .) The internal parts of the DSC HU/CM could be damaged if dropped. Be careful not to drop the DSC HU/CM. Replace the DSC HU/CM if it is subjected to an impact.

Scheme 109

Scheme 109
  1. Perform DSC configuration. (See «DSC CONFIGURATION»(ref-178171-S11973077002005061200000).)
  2. Remove the front suspension tower bar. (See «FRONT SUSPENSION TOWER BAR»(ref-170063-S10851823732004122800000).)
  3. Remove in the order indicated. (Scheme 109)
  4. Install in the reverse order of removal.

Scheme 110

Scheme 110: Connector Removal Note
  1. Rotate the lock lever in the direction of the arrow, and remove the DSC HU/CM connector.

DSC HU/CM Removal/Installation Note

  1. When removing/installing the DSC HU/CM from/to the vehicle, attach a strip of protective tape on the DSC HU/CM connector to prevent brake fluid from entering.

Scheme 111

Scheme 111: Connector Installation Note
  1. After connecting the connector, rotate the lock lever in the direction of the arrow to install the DSC HU/CM connector.

FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION

  1. Remove or install the front ABS wheel-speed sensor in the same order of vehicles with ABS. (See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION .)

REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION

  1. Remove or install the rear ABS wheel-speed sensor in the same order of vehicles with ABS. (See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION .)

COMBINED SENSOR REMOVAL/INSTALLATION

CAUTIONThe internal parts of the combined sensor could be damaged if dropped. Be careful not to drop the combined sensor. Replace the combined sensor if it is subjected to an impact. Also, do not use an impact wrench or other similar air tools when removing/installing the sensor.

Scheme 112

Scheme 112

Scheme 113

Scheme 113
  1. Remove the rear console.
  2. Remove in the order indicated. (Scheme 112)
  3. Install in the reverse order of removal.
  4. After installation, perform the combined sensor initialization procedure. (See «COMBINED SENSOR INITIALIZATION PROCEDURE»(ref-178171-S36090790582005061200000).)

Scheme 114

Scheme 114: COMBINED SENSOR INSPECTION

Scheme 115

Scheme 115

Scheme 116

Scheme 116
  1. Turn the ignition switch off.
  2. Connect the WDS or equivalent to the DLC-2.
  3. Select the following PIDs, then inspect the lateral acceleration speed and the yaw rate. LAT ACC: (lateral acceleration speed) YAW_RATE: (yaw rate) Lateral acceleration speed inspection Verify the LAT ACC change when the combined sensor is tilted to the left and right. If there is any malfunction, replace the combined sensor. Standard When the sensor is tilted to the right: LAT ACC changes negatively. When the sensor is tilted to the left: LAT ACC changes positively. Yaw rate inspection Verify the YAW_RATE change when the combined sensor is rotated to the left and right. If there is any malfunction, replace the combined sensor. Standard When the sensor is rotated to the right: YAW_RATE changes negatively. When the sensor is rotated to the left: YAW_RATE changes positively.

STEERING ANGLE SENSOR REMOVAL/INSTALLATION

Note. The steering angle sensor is integrated into the combination switch to ensure sensor performance. Replace the steering angle sensor and combination switch as a single unit. (See COMBINATION SWITCH REMOVAL/INSTALLATION .)

Scheme 117

Scheme 117: STEERING ANGLE SENSOR INSPECTION

Scheme 118

Scheme 118
  1. Remove the column cover.
  2. Measure the voltage between steering angle sensor terminal B and ground. If there is any malfunction, inspect the wiring harness between steering angle sensor terminal B and battery, then repair or replace if necessary. Standard voltage B+
  3. Turn the ignition switch to the ON position, then measure the voltage between steering angle sensor terminal A and ground. If there is any malfunction, inspect the wiring harness between steering angle sensor terminal A and ignition switch, then repair or replace if necessary. Standard voltage B+
  4. Measure the voltage between steering angle sensor terminal H and the ground. If there is any malfunction, inspect the wiring harness between steering angle sensor terminal H and ground point, then repair or replace if necessary. Standard voltage B+
  5. Turn the ignition switch off.
  6. Connect the WDS or equivalent to the DLC-2.
  7. Select the SWA POS PID.
  8. Verify the SWA POS changes when the steering wheel is turned to the left and right. If there is any malfunction, replace the steering angle sensor. Standard When the steering wheel is turned to the right: SWA POS changes positively. When the steering wheel is turned to the left: SWA POS changes negatively.

DSC OFF Switch Removal Note

  1. Access the DSC OFF switch from behind of the dashboard, and squeeze the tabs of the switch.
  2. Pull the DSC OFF switch towards the driver's side to remove it.

Scheme 119

Scheme 119: DSC OFF SWITCH INSPECTION

Scheme 120

Scheme 120
  1. Remove the DSC OFF switch.
  2. Verify that the continuity is as indicated. (Scheme 119) If not as indicated, replace the DSC OFF switch. (Scheme 119)