DTC

C1279, C1280, C1281, C1282, C1951, C1952, C1959, C2768

Combined sensor system

DETECTION CONDITION

• C1279

• The yaw rate value from the combined sensor (yaw rate part) exceeds specification while the vehicle is stopped or while accelerating from a standstill.

• C1280

• The difference between the yaw rate value calculated by each sensor and the yaw rate value from the combined sensor (yaw rate part) exceeds specification.

• C1281

• The difference between the lateral-G value calculated by each sensor and the lateral-G value from the combined sensor (lateral-G part) exceeds specification.

• C1282

• Specified signal pattern from combined sensor has not output after the ignition switch is turned to the ON position.

• C1951

• The monitor voltage from the combined sensor (lateral-G part) is not within specification.

• C1952

• The monitor voltage from the combined sensor (yaw rate part) is not within specification.

• C1959

• The lateral-G value from the combined sensor (lateral-G part) exceeds specification.

• C2768

• There is an abnormality in the signal from the combined sensor (yaw rate part).

POSSIBLE CAUSE

• Open circuit in the wiring harness between ignition switch and combined sensor terminal E or short circuit to ground

• Open circuit in the wiring harness between DSC HU/CM terminal Y and combined sensor terminal F or short circuit to ground

• Open circuit in the wiring harness between DSC HU/CM terminal AB and combined sensor terminal C or short circuit to ground

• Open circuit in the wiring harness between DSC HU/CM terminal AE and combined sensor terminal A or short circuit to ground

• Open circuit in the wiring harness between DSC HU/CM terminal AA and combined sensor terminal B or short circuit to ground

• Open circuit in the wiring harness between DSC HU/CM terminal AI and combined sensor terminal D

• Combined sensor malfunction

• Poor connection at connectors (female terminal)

STEP

INSPECTION

ACTION

1

• Turn the ignition switch to the ON position (engine off).

• Measure voltage between combined sensor terminal E (harness-side) and ground.

• Is the voltage B+?

Yes

Go to the next step.

No

Repair or replace the wiring harness for open circuit between combined sensor terminal E and ignition switch, then go to Step 12.

2

• Turn the ignition switch off.

• Disconnect DSC HU/CM and combined sensor connectors.

• Inspect for continuity between DSC HU/CM terminal Y (harness-side) and combined sensor terminal F (harness-side).

• Is there continuity?

Yes

Go to the next step.

No

Repair or replace the wiring harness for open circuit between DSC HU/CM terminal Y and combined sensor terminal F, then go to Step 12.

3

• Inspect for continuity between DSC HU/CM terminal AA (harness-side) and combined sensor terminal B (harness-side).

• Is there continuity?

Yes

Go to the next step.

No

Repair or replace the wiring harness for open circuit between DSC HU/CM terminal AA and combined sensor terminal B, then go to Step 12.

4

• Turn the ignition switch off.

• Inspect for continuity between DSC HU/CM terminal AA (harness-side) and ground.

• Is there continuity?

Yes

Repair or replace the wiring harness for short to ground between DSC HU/CM terminal AA and combined sensor terminal B, then go to Step 12.

No

Go to the next step.

5

• Inspect for continuity between DSC HU/CM terminal AI (harness-side) and combined sensor terminal D (harness-side).

• Is there continuity?

Yes

Go to the next step.

No

Repair or replace the wiring harness for open circuit between DSC HU/CM terminal AI and combined sensor terminal D, then go to Step 12.

6

• Turn the ignition switch off.

• Inspect for continuity between DSC HU/CM terminal AI (harness-side) and ground.

• Is there continuity?

Yes

Repair or replace the wiring harness for short to ground between DSC HU/CM terminal AI and combined sensor terminal D, then go to Step 12.

No

Go to the next step.

7

• Turn the ignition switch off.

• Inspect for continuity between DSC HU/CM terminal AE (harness-side) and combined sensor terminal A (harness-side).

• Is there continuity?

Yes

Go to the next step.

No

Repair or replace the wiring harness for open circuit between DSC HU/CM terminal AE and combined sensor terminal A, then go to Step 12.

8

• Turn the ignition switch off.

• Inspect for continuity between DSC HU/CM terminal AE (harness-side) and ground.

• Is there continuity?

Yes

Repair or replace the wiring harness for short to ground between DSC HU/CM terminal AE and combined sensor terminal A, then go to Step 12.

No

Go to the next step.

9

• Turn the ignition switch off.

• Inspect for continuity between DSC HU/CM terminal AB (harness-side) and combined sensor terminal C (harness-side).

• Is there continuity?

Yes

Go to the next step.

No

Repair or replace the wiring harness for open circuit between DSC HU/CM terminal AB and combined sensor terminal C, then go to Step 12.

10

• Turn the ignition switch off.

• Inspect for continuity between DSC HU/CM terminal AB (harness-side) and ground.

• Is there continuity?

Yes

Repair or replace the wiring harness for short to ground between DSC HU/CM terminal AB and combined sensor terminal C, then go to Step 12.

No

Go to the next step.

11

• Inspect the combined sensor.

  (See COMBINED SENSOR INSPECTION.)

• Is the combined sensor normal?

Yes

Go to the next step.

No

Replace the combined sensor, then go to the next step.

(See COMBINED SENSOR REMOVAL/INSTALLATION.)

12

• Clear the DTC from the memory.

  (See ON-BOARD DIAGNOSIS[DYNAMIC STABILITY CONTROL (DSC)].)

• Are the same DTCs present?

Yes

Replace the DSC HU/CM, then go to the next step.

(See DSC HU/CM REMOVAL/INSTALLATION.)

No

Go to the next step.

13

• Are any other DTCs present?

Yes

Go to the applicable DTC inspection.

(See ON-BOARD DIAGNOSIS[DYNAMIC STABILITY CONTROL (DSC)].)

No

DTC troubleshooting completed.