Dynamic Stability Control System: Diagnosis Mazda 6 GJ

DSC HU/CM INSPECTION

1. Disconnect the DSC HU/CM connector. (See «DSC HU/CM REMOVAL/INSTALLATION»(ref-581627-S26802314152013101400000) .)
2. Connect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.5]»(ref-581638-S19258420632013101400000) .) (See «BATTERY REMOVAL/INSTALLATION [MZI 3.7 V6]»(ref-581639-S29135432412013101400000) .)
3. Attach the tester lead to the DSC HU/CM wiring harness-side connector, then inspect the voltage, continuity, or resistance according to the standard (reference) on the table.

Identifying DSC HU/CM Wiring Harness-Side Connector Terminals. Scheme 16

Scheme 17

1. Remove in the order indicated in the table.
2. Install in the reverse order of removal.
3. After installation, verify that there is no twisting in the ABS wheel-speed sensor. (Scheme 17): Front ABS Wheel-Speed Sensor Components With Torque Specifications

Sensor Output Value Inspection

Scheme 18

1. Switch the ignition to off.
2. Connect the M-MDS (IDS) to the DLC-2. (Scheme 18): Identifying DLC-2 Location
3. Select the following PIDs using the M-MDS: WSPD_LF (LF wheel-speed sensor) WSPD_RF (RF wheel-speed sensor)
4. Start the engine and drive the vehicle.
5. Verify that the display of the M-MDS shows the same value as the speedometer. If there is any malfunction, replace the ABS wheel-speed sensor.

Installation Visual Inspection

1. Inspect the following items: If there is any malfunction, replace the applicable part. Is there any looseness or play? Has the sensor been deformed?

Scheme 19

1. Remove the ABS wheel-speed sensor. (See «FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION»(ref-581627-S37278026312013101400000).)
2. Remove the wheel hub, steering knuckle component. (See «WHEEL HUB, STEERING KNUCKLE REMOVAL/INSTALLATION»(ref-581628-S12281121712013101400000).)
3. Install the ABS wheel-speed sensor to the removed wheel hub, steering knuckle component, and tighten to the specified torque. (Scheme 19): Identifying ABS Wheel-Speed Sensor And Bolt Tightening torque 8-12 N.m {82-122 kgf.cm, 71-106 in.lbf}

Scheme 20

1. Measure the gap between the ABS sensor rotor and ABS wheel-speed sensor using a feeler gauge. (Scheme 20): Measuring Gap Between ABS Sensor Rotor And ABS Wheel-Speed Sensor Using Feeler Gauge If not within the specification, verify the following items and repair or replace if necessary. Is there deformation or damage to the ABS sensor rotor? Is there deformation or damage to the ABS wheel speed sensor? Is there foreign material adhering? Clearance 0.6-1.5 mm {0.03-0.05 in}

Servicing after inspection

1. Remove the ABS wheel-speed sensor from the wheel hub, steering knuckle component.
2. Install the wheel hub, steering knuckle component. (See «WHEEL HUB, STEERING KNUCKLE REMOVAL/INSTALLATION»(ref-581628-S12281121712013101400000) .)
3. Install the ABS wheel-speed sensor. (See «FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION»(ref-581627-S37278026312013101400000) .)
4. Inspect the front wheel alignment. (See «FRONT WHEEL ALIGNMENT»(ref-581692-S13766259402013101400000) .)

Scheme 21

Scheme 22

1. Remove the rear seat cushion. (See «REAR SEAT CUSHION REMOVAL/INSTALLATION»(ref-581617-S39478993682013101400000).)
2. Remove the rear side seat back. (See «REAR SIDE SEAT BACK REMOVAL/INSTALLATION»(ref-581617-S04306764902013101400000).)
3. Remove the trunk end trim. (See «TRUNK END TRIM REMOVAL/INSTALLATION»(ref-581614-S18023401772013101400000).)
4. Remove the trunk side trim. (See «TRUNK SIDE TRIM REMOVAL/INSTALLATION»(ref-581614-S05382445092013101400000).)
5. Disconnect the rear ABS wheel-speed sensor connector. (Scheme 21): Locating Rear ABS Wheel-Speed Sensor Tabs
6. Press the rear ABS wheel-speed sensor tabs and press out the sensor toward the outside of the vehicle.
7. Remove in the order indicated in the table.
8. Install in the reverse order of removal. (Scheme 22): Rear ABS Wheel-Speed Sensor Components With Torque Specifications

1. Inspect the following items: If there is any malfunction, replace the applicable part. Is there looseness or play in the sensor installation? Has the sensor been deformed? Is there deformation of or damage to the ABS sensor rotor?

Scheme 23

1. Remove the rear ABS wheel-speed sensor.
2. Measure the distance between the rear ABS wheel-speed sensor installation surface and the rear ABS sensor rotor. This is dimension A. (Scheme 23): Measuring Distance Between Rear ABS Wheel-Speed Sensor Installation Surface And Rear ABS Sensor Rotor
3. Calculate the clearance between the rear ABS wheel-speed sensor and the ABS sensor rotor using the following formula: Clearance (mm {in}) = A-15 mm {0.59 in}
4. Verify that the clearance between the ABS sensor rotor and the rear ABS wheel-speed sensor is as indicated below. If there is any malfunction, verify the installation condition and replace if necessary. Clearance 0.3-1.1 mm {0.02-0.04 in}

Scheme 24

1. Switch the ignition to off.
2. Connect the M-MDS (IDS) to the DLC-2. (Scheme 24): Identifying DLC-2 Location
3. Select the following PIDs using the M-MDS: WSPD_LR (LR wheel-speed sensor) WSPD_RR (RR wheel-speed sensor)
4. Start the engine and drive the vehicle.
5. Verify that the display of the M-MDS shows the same value as the speedometer. If there is any malfunction, replace the ABS wheel-speed sensor.

Scheme 25

Scheme 26

Scheme 27

1. Switch the ignition to off.
2. Disconnect the brake pipe. (Scheme 25): Identifying Brake Pipe, Brake Hose (LF) And Bracket
3. Remove the brake hose (LF).
4. Remove the bracket.
5. Install the SSTs to the brake pipe as shown in the figure. (Scheme 26): Installing SSTs To Brake Pipe
6. Perform air bleeding of the SST and brake line from bleeder screw A.
7. Connect the M-MDS (IDS) to the DLC-2. (Scheme 27): Identifying DLC-2 Location
8. Select the "MCYLI_P" PID. (See «ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)]»(ref-581612-S35041327492013101400000).)
9. Start the engine.
10. Depress the brake pedal, and verify that the fluid pressure value of the SST (gauge) and the value shown on the M-MDS are equal. If the fluid pressure values are different, replace the DSC HU/CM. (See «DSC HU/CM REMOVAL/INSTALLATION»(ref-581627-S26802314152013101400000).)
11. Remove the SSTs after the inspection and install the bracket, brake hose and brake pipe to their original positions. (See «BRAKE HOSE (FRONT) REMOVAL/INSTALLATION»(ref-581625-S28446680462013101400000).)
12. Perform air bleeding of the brake line. (See «BRAKE FLUID AIR BLEEDING»(ref-581625-S05094041712013101400000).)

Scheme 28

1. Remove the following parts: Front scuff plate (driver-side) (See «FRONT SCUFF PLATE REMOVAL/INSTALLATION»(ref-581614-S36484760642013101400000).) Front side trim (driver-side) (See «FRONT SIDE TRIM REMOVAL/INSTALLATION»(ref-581614-S15846352132013101400000).) Upper panel (See «UPPER PANEL REMOVAL/INSTALLATION»(ref-581614-S15065956352013101400000).) Decoration panel (driver-side) (See «DECORATION PANEL REMOVAL/INSTALLATION»(ref-581614-S30597239632013101400000).) Hood release lever (See «HOOD LATCH AND RELEASE LEVER REMOVAL/INSTALLATION»(ref-581656-S24929307862013101400000).) Meter hood (See «METER HOOD REMOVAL/INSTALLATION»(ref-581614-S19165313082013101400000).) Lower panel (driver-side) (See «LOWER PANEL REMOVAL/INSTALLATION»(ref-581614-S08723493922013101400000).)
2. Press the tabs. (Scheme 28): Locating DSC OFF Switch Tabs
3. Remove the DSC OFF switch.
4. Install in the reverse order of removal.

Scheme 29

Scheme 30

1. Remove the DSC OFF switch. (See «DSC OFF SWITCH REMOVAL/INSTALLATION»(ref-581627-S25648891932013101400000).)
2. Verify that the continuity between the DSC OFF switch terminals is as indicated in the table. If not as indicated in the table, replace the DSC OFF switch. (Scheme 29): Identifying DSC OFF Switch Terminals (Scheme 30): DSC OFF Switch Terminals Continuity Chart
3. Apply battery voltage to DSC OFF switch terminal E, and connect terminal A to ground.
4. Verify that the LED illuminates. If there is any malfunction, replace the DSC OFF switch.