DTC C1279, C1280, C1281, C1952, C1959 [DYNAMIC STABILITY CONTROL (DSC)]

id0402b2887300

DTC | C1279, C1280, C1281, C1952, C1959 | Combined sensor system
DETECTION CONDITION | • C1279 ― Variation of the yaw rate value from the combined sensor while the vehicle is stopped or started is not within the specification. • C1280 ― Condition 1 • The difference between the yaw rate value calculated by each sensor and the yaw rate value from the combined sensor exceeds the specification. ― Condition 2 • While the vehicle is moving forward, one of the yaw rate values is + and the other is - (yaw rate value calculated from steering angle sensor signal and one from the combined sensor). • C1281 ― Difference between the two lateral-G values exceeds the specification (one from the combined sensor and one calculated from yaw rate signal from the combined sensor, steering angle sensor signal, and ABS wheel-speed sensor signal). • C1952 ― Signal, which indicates low voltage or over voltage, from the combined sensor is continued for 100 ms. • C1959 ― Variation of the lateral-G value from the combined sensor is not within the specification.
POSSIBLE CAUSE | • Poor installation of combined sensor • Open circuit or short to ground in wiring harness between ignition switch—combined sensor terminal A • Open circuit in wiring harness between combined sensor terminal D—ground • Combined sensor 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.)
5 | VERIFY DTC TROUBLESHOOTING COMPLETED • Clear the DTC from the memory. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) • Start the engine and drive the vehicle at 10 km/h {6.0 mph} or more. • Are the same DTCs present? (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) | Yes | Replace the DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION.)
No | Go to the next step.
6 | VERIFY AFTER REPAIR PROCEDURE • Are any other DTCs present? (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) | Yes | Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
No | DTC troubleshooting completed.