DTC C1279, C1280, C1281, C1282, C2778 [DSC]

id040220804100

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.
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.
No
Repair or replace the wiring harness, then go to Step 4.
3
INSPECT COMBINED SENSOR
• Inspect the combined sensor.
• Is the combined sensor normal?
Yes
Go to the next step.
No
Replace the combined sensor, then go to the next step.
4
VERIFY THAT THE SAME DTC IS NOT PRESENT
• Clear the DTCs from the memory.
• 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.
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 DTC Table.)
No
DTC troubleshooting completed.