DTC C0037[08] Rear Right Wheel Speed Sensor DMA Buffer Noise Failure (ABS/ESC)

1. Brake control system check

Refer to "54.Brake Control 4A.Troubleshooting(ABS/ESC) diagnostic System Check - Brake Controls".

2. Prioritized DTC check

1) Turn OFF the ignition switch.

2) Connect the scan tool.

3) Turn ON the ignition switch.

4) Observe the DTC information with a scan tool. Is DTC C0037[01] set at the same time?

Yes

Go to DTC C0037[01] diagnosis.

Refer to "54.Brake Control 4A.Troubleshooting(ABS/ESC) DTC C0037[01] Rear Right Wheel Speed Sensor Electrical Failure".

No

=>Go to Rear right axle bearing inspection.

3. Rear right axle bearing inspection

1) Jack up the vehicle and inspect the axle bearing for the following. Is the result normal?

Inspection items

  • The tire should not be loosened when manually shaken laterally.

Yes

=>Go to Rear right wheel speed sensor inspection.

No

Repair as necessary.

Refer to "3.Driveline, Axle 3C.Drive Shaft System rear axle shaft removal".

Refer to "3.Driveline, Axle 3C.Drive Shaft System rear axle shaft installation".

=>Go to Repair verification.

4. Rear right wheel speed sensor inspection

1) Inspect the wheel speed sensor for the following. Is the result normal?

Inspection items

  • Wheel speed sensor installation status
  • There should be no damage from interference with the exciter ring, etc.
  • There should be no deformation.
  • There should be no adhesion of large amounts of magnetic material, such as iron powder.

Yes

=>Go to Rear right exciter ring inspection.

No

Replace the rear right wheel speed sensor or clean the magnetic material as necessary.

Refer to "4.Brakes 4Z.Brake Electrical Control rear wheel speed sensor removal".

Refer to "4.Brakes 4Z.Brake Electrical Control rear wheel speed sensor installation".

=>Go to Repair verification.

5. Rear right exciter ring inspection

1) Remove the rear axle shaft.

2) Inspect the exciter ring for the following. Is the result normal?

Inspection items

  • There should be no damage from interference with the wheel speed sensor, etc.
  • There should be no deformation or eccentricity.
  • There should be no adhesion of large amounts of magnetic material, such as iron powder.
  • The garter spring should not coil itself around the exciter ring.

Refer to "3.Driveline, Axle 3C.Drive Shaft System rear axle shaft removal".

Refer to "3.Driveline, Axle 3C.Drive Shaft System rear axle shaft installation".

Yes

=>Go to Procedure completion check.

No

Replace the exciter ring or remove the magnetic material.

Refer to "4.Brakes 4D.ABS rear exciter ring removal".

Refer to "4.Brakes 4D.ABS rear exciter ring installation".

Note

  • Because the exciter ring cannot be reused, always install a new one if it is removed.

=>Go to Repair verification.

6. Procedure completion check

1) Securely connect the disconnected harness connectors.

2) Clear the DTC with a scan tool.

3) Turn OFF the ignition switch.

4) Start the engine and drive at 25 km/h {16 mph} or more.

5) Observe the DTC information with a scan tool. Is a DTC set?

Yes

=>Go to EHCU replacement.

No

The system is normal.

7. EHCU replacement

Note

  • Perform programming after replacing the EHCU.

Refer to "4.Brakes 4Z.Brake Electrical Control EHCU removal".

Refer to "4.Brakes 4Z.Brake Electrical Control EHCU installation".

Refer to "4.Brakes 4Z.Brake Electrical Control EHCU setting".

Procedure completion

=>Go to Repair verification.

8. Repair verification

1) Clear the DTC with a scan tool.

2) Turn OFF the ignition switch.

3) Start the engine and drive at 25 km/h {16 mph} or more.

4) Observe the DTC information with a scan tool.

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