DTC C1279, C1280, C1281, C1952, C1959SM2445166
DTC C1279, C1280, C1281, C1952, C1959

id040200887300

DTC
C1279, C1280, C1281, C1952, C1959
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.
• 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.
POSSIBLE CAUSE
• Poor installation of combined sensor
• Open circuit or short to ground in wiring harness between ignition switch and combined sensor terminal A
• Open circuit in wiring harness between combined sensor terminal D and ground
• Combined sensor malfunction
• DSC HU/CM malfunction
• Poor connection at connectors (female terminal)

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT COMBINED SENSOR INSTALLATION CONDITION
• Inspect the installation condition of the combined sensor.
• Is the combined sensor installed correctly?
Yes
Go to the next step.
No
Install the combined sensor correctly, then go to the next step.
2
INSPECT COMBINED SENSOR POWER SUPPLY FOR OPEN OR SHORT CIRCUIT
• Turn the ignition switch to the ON position.
• Measure the voltage between combined sensor terminal A 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 5.
3
INSPECT COMBINED SENSOR GROUND FOR OPEN CIRCUIT
• Turn the ignition switch to the LOCK position.
• Inspect for continuity between combined sensor terminal D and body ground.
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to Step 5.
4
INSPECT COMBINED SENSOR
• 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 [MTX].)
(See COMBINED SENSOR REMOVAL/INSTALLATION [ATX].)
5
VERIFY DTC TROUBLESHOOTING COMPLETED
• Clear the DTC from the memory. (See ON-BOARD DIAGNOSIS.)
• Start the engine and drive the vehicle at 10 km/h {6.0 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.
(See DSC HU/CM REMOVAL/INSTALLATION [L.H.D.].)
(See DSC HU/CM REMOVAL/INSTALLATION [R.H.D.].)
No
Go to the next step.
6
VERIFY AFTER REPAIR PROCEDURE
• Are any other DTCs present? (See ON-BOARD DIAGNOSIS.)
Yes
Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSIS.)
No
DTC troubleshooting completed.