DTC C1279, C1280, C1281, C1282, C2778 [DYNAMIC STABILITY CONTROL (DSC)]

id0402b2804100

DTC

C1279, C1280, C1281, C1282, C2778

Combined sensor system

DETECTION CONDITION

•  C1279, C1280

―  Out-of-specification signal modulation or yaw rate value is detected from the combined sensor (yaw rate part).

•  C1281, C1282

―  Out-of-specification signal modulation or lateral-G value is detected from the combined sensor (lateral-G part).

•  C2778

―  An error is detected for the voltage to the combined sensor.

POSSIBLE CAUSE

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

•  Open or short circuit in the wiring harness between DSC HU/CM terminal AH and combined sensor terminal E

•  Open circuit in the wiring harness between DSC HU/CM terminal T and combined sensor terminal A (CAN2 line)

•  Open circuit in the wiring harness between DSC HU/CM terminal H and combined sensor terminal B (CAN2 line)

•  Combined sensor malfunction

•  Poor connection at connectors (female terminal)

Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT COMBINED SENSOR POWER SUPPLY FOR OPEN CIRCUIT • Turn the ignition switch to the ON position. • Measure the voltage between the combined sensor terminal D and body ground. • Is the voltage approx. 12 V?	Yes	Go to the next step.
1		No	Repair or replace the wiring harness, then go to Step 4.
2	INSPECT COMBINED SENSOR GROUND FOR OPEN CIRCUIT • Turn the ignition switch off. • Inspect for continuity between the combined sensor terminal E and body ground. • Is there continuity?	Yes	Go to the next step.
2		No	Repair or replace the wiring harness, then go to Step 4.
3	INSPECT COMBINED SENSOR • Inspect the combined sensor. (See COMBINED SENSOR INSPECTION.) • Is the combined sensor normal?	Yes	Go to the next step.
3		No	Replace the combined sensor, then go to the next step. (See COMBINED SENSOR REMOVAL/INSTALLATION.)
4	VERIFY THAT THE SAME DTC IS NOT PRESENT • Clear the DTCs from the memory. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) • Start the engine and drive the vehicle at 10 km/h {6.2 mph} or more. • Are the same DTCs present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the DSC CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION.)
4		No	Go to the next step.
5	VERIFY THAT NO OTHER DTCS ARE PRESENT • Are any other DTCs output?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
5		No	DTC troubleshooting completed.

DTC	C1279, C1280, C1281, C1282, C2778		Combined sensor system
DETECTION CONDITION		• C1279, C1280 ― Out-of-specification signal modulation or yaw rate value is detected from the combined sensor (yaw rate part). • C1281, C1282 ― Out-of-specification signal modulation or lateral-G value is detected from the combined sensor (lateral-G part). • C2778 ― An error is detected for the voltage to the combined sensor.
POSSIBLE CAUSE		• Open or short circuit in the wiring harness between DSC HU/CM terminal AB and combined sensor terminal D • Open or short circuit in the wiring harness between DSC HU/CM terminal AH and combined sensor terminal E • Open circuit in the wiring harness between DSC HU/CM terminal T and combined sensor terminal A (CAN2 line) • Open circuit in the wiring harness between DSC HU/CM terminal H and combined sensor terminal B (CAN2 line) • Combined sensor malfunction • Poor connection at connectors (female terminal)