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DTC C1279, C1280, C1281, C1282, C1951, C1952, C1959, C2768

BHE040243000W27

DTC | C1279, C1280, C1281, C1282, C1951, C1952, C1959, C2768 | Combined sensor
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. • C1282 – Specified signal pattern from combined sensor has not output after the ignition switch is turned to the ON position. • C1951 – The monitor voltage from the combined sensor (lateral-G part) is not within 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. • C2768 – There is an abnormality in the signal from the combined sensor (yaw rate part).
POSSIBLE CAUSE | • Open circuit in the wiring harness between DSC HU/CM terminal A and combined sensor terminal A or short circuit to ground • Open circuit in the wiring harness between DSC HU/CM terminal D and combined sensor terminal C or short circuit to ground • Open circuit in the wiring harness between DSC HU/CM terminal F and combined sensor terminal B or short circuit to ground • Open circuit in the wiring harness between DSC HU/CM terminal G and combined sensor terminal D or short circuit to ground • Open circuit in the wiring harness between DSC HU/CM terminal L and combined sensor terminal E or short circuit to ground • Open circuit in the wiring harness between DSC HU/CM terminal P and combined sensor terminal F • 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 (engine off). • Measure voltage between combined sensor terminal E (harness-side) and ground. • Is the voltage 4.5-5.5 V? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open circuit between combined sensor terminal E and DSC HU/CM terminal L, then go to Step 12.
2 | INSPECT COMBINED SENSOR GROUND FOR OPEN CIRCUIT • Turn the ignition switch off. • Disconnect DSC HU/CM and combined sensor connectors. • Inspect for continuity between DSC HU/CM terminal P (harness-side) and combined sensor terminal F (harness-side). • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open circuit between DSC HU/CM terminal P and combined sensor terminal F, then go to Step 12.
3 | INSPECT COMBINED SENSOR (YAW RATE PART) SIGNAL FOR OPEN CIRCUIT • Inspect for continuity between DSC HU/CM terminal F (harness-side) and combined sensor terminal B (harness-side). • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open circuit between DSC HU/CM terminal F and combined sensor terminal B, then go to Step 12.
4 | INSPECT COMBINED SENSOR (YAW RATE PART) SIGNAL FOR SHORT TO GROUND • Turn the ignition switch off. • Inspect for continuity between DSC HU/CM terminal F (harness-side) and ground. • Is there continuity? | Yes | Repair or replace the wiring harness for short to ground between DSC HU/CM terminal F and combined sensor terminal B, then go to Step 12.
No | Go to the next step.
5 | INSPECT COMBINED SENSOR (LATERAL-G PART) SIGNAL FOR OPEN CIRCUIT • Inspect for continuity between DSC HU/CM terminal G (harness-side) and combined sensor terminal D (harness-side). • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open circuit between DSC HU/CM terminal G and combined sensor terminal D, then go to Step 12.
6 | INSPECT COMBINED SENSOR (LATERAL-G PART) SIGNAL FOR SHORT TO GROUND • Turn the ignition switch off. • Inspect for continuity between DSC HU/CM terminal G (harness-side) and ground. • Is there continuity? | Yes | Repair or replace the wiring harness for short to ground between DSC HU/CM terminal G and combined sensor terminal D, then go to Step 12.
No | Go to the next step.
7 | INSPECT REFERENCE SIGNAL FOR OPEN CIRCUIT • Turn the ignition switch off. • Inspect for continuity between DSC HU/CM terminal A (harness-side) and combined sensor terminal A (harness-side). • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open circuit between DSC HU/CM terminal A and combined sensor terminal A, then go to Step 12.
8 | INSPECT REFERENCE SIGNAL FOR SHORT TO GROUND • Turn the ignition switch off. • Inspect for continuity between DSC HU/CM terminal A (harness-side) and ground. • Is there continuity? | Yes | Repair or replace the wiring harness for short to ground between DSC HU/CM terminal A and combined sensor terminal A, then go to Step 12.
No | Go to the next step.
9 | INSPECT TEST SIGNAL FOR OPEN CIRCUIT • Turn the ignition switch off. • Inspect for continuity between DSC HU/CM terminal D (harness-side) and combined sensor terminal C (harness-side). • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open circuit between DSC HU/CM terminal D and combined sensor terminal C, then go to Step 12.
10 | INSPECT TEST SIGNAL FOR SHORT TO GROUND • Turn the ignition switch off. • Inspect for continuity between DSC HU/CM terminal D (harness-side) and ground. • Is there continuity? | Yes | Repair or replace the wiring harness for short to ground between DSC HU/CM terminal D and combined sensor terminal C, then go to Step 12.
No | Go to the next step.
11 | 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.)
12 | VERIFY DTC TROUBLESHOOTING COMPLETED. • Clear the DTC from the memory. (See Clearing DTCs Procedures.) • Are the same DTCs present? | Yes | Replace the DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION.)
No | Go to the next step.
13 | VERIFY AFTER REPAIR PROCEDURE. • Are any other DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC Table.)
No | DTC troubleshooting completed.