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

B3E040243000W22

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 HU/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.