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 DTC C1280, C1730, C1951, C1952, C1959 [DSC]

DTC C1280, C1730, C1951, C1952, C1959 [DSC]

id040220875000

DTC

C1280, C1730, C1951, C1952, C1959

Combined sensor

DETECTION CONDITION

• C1280:
- Yaw rate sensor part 0-point correction value is 3 or more, or 2 or less
- Output voltage value from yaw rate sensor part remains absolutely unchanged
- Difference between estimated yaw rate value, calculated from ABS wheel speed-sensor, lateral-G sensor, steering angle sensor, and the value output from yaw rate sensor exceeds specification
• C1730
- Voltage to combined sensor is detected out of range
• C1952:
- Voltage of yaw rate sensor monitor is detected at 3.5 V or less
• C1951:
- Monitor voltage of lateral-G sensor is detected at 4.5 V or more, or 0.5 V or less
- Monitor voltage difference of 1.25 V or more, within 1 cycle is detected 8 times in 1 s
• C1959:
- Lateral-G sensor part 0-point correction value is 3 or more, or 2 or less
- Output voltage value from lateral-G sensor part remains absolutely unchanged
- Difference between estimated lateral-G force calculated from steering angle sensor, and the value output from lateral-G sensor exceeds specification

POSSIBLE CAUSE

• Open circuit in harness between combined sensor terminal C and DSC HU/CM terminal P
• Open, short to power, or short to ground circuit in harness between DSC HU/CM terminal T and combined sensor terminal D
• Open circuit, short to power, or short to ground in harness between DSC HU/CM terminal O and combined sensor terminal B
• Open circuit in harness between combined sensor terminal E and DSC HU/CM terminal Y
• Open circuit, short to power, or short to ground in harness between DSC HU/CM terminal S and combined sensor terminal F
• Malfunction of combined sensor

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT COMBINED SENSOR POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
• Turn ignition key to ON (engine OFF).
• Measure voltage between combined sensor terminal C (harness side) of and ground.
• Is voltage 4.5-5.5 V?
Yes
Go to next step.
No
Repair or replace harness for open circuit between yaw rate sensor terminal C and ignition switch, then go to Step 8.
2
INSPECT COMBINED SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT
• Turn ignition key to OFF.
• Disconnect DSC HU/CM and yaw rate sensor connectors.
• Inspect continuity between DSC HU/CM terminal Y (harness side) and combined sensor terminal E (harness side).
• Is there continuity?
Yes
Go to next step.
No
Repair or replace harness for open circuit between DSC HU/CM terminal Y and yaw rate sensor terminal E, then go to Step 8.
3
INSPECT YAW RATE SENSOR PART SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Inspect continuity between DSC HU/CM terminal T (harness side) and combined sensor terminal D (harness side).
• Is there continuity?
Yes
Go to next step.
No
Repair or replace harness for open circuit between DSC HU/CM terminal T and yaw rate sensor terminal D, then go to Step 8.
4
INSPECT LATERAL-G SENSOR PART SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Inspect continuity between DSC HU/CM terminal O (harness side) and combined sensor terminal B (harness side).
• Is there continuity?
Yes
Go to next step.
No
Repair or replace harness for open circuit between DSC HU/CM terminal O and combined sensor terminal B, then go to Step 8.
5
INSPECT YAW RATE SENSOR PART SIGNAL CIRCUIT FOR SHORT TO GROUND
• Turn ignition key to OFF.
• Inspect continuity between DSC HU/CM terminal T (harness side) and ground.
• Is there continuity?
Yes
Repair or replace harness for short to ground circuit between DSC HU/CM terminal T and combined sensor terminal D, then go to Step 8.
No
Go to next step.
6
INSPECT LATERAL-G SENSOR PART SIGNAL CIRCUIT FOR SHORT TO GROUND
• Turn ignition key to OFF.
• Inspect continuity between DSC HU/CM terminal O (harness side) and ground.
• Is there continuity?
Yes
Repair or replace harness for short to ground circuit between DSC HU/CM terminal O and combined sensor terminal B, then go to Step 8.
No
Go to next step.
7
INSPECT DIAGNOSIS SIGNAL CIRCUIT FOR SHORT FOR OPEN
• Turn ignition key to OFF.
• Inspect continuity between DSC HU/CM terminal S (harness side) and combined sensor terminal F.
• Is there continuity?
Yes
Repair or replace harness for open circuit between DSC HU/CM terminal S and combined sensor terminal F, then go to Step 8.
No
Go to next step.
8
INSPECT DIAGNOSIS SIGNAL CIRCUIT FOR SHORT TO GROUND
• Turn ignition key to OFF.
• Inspect continuity between DSC HU/CM terminal S (harness side) and combined sensor terminal F.
• Is there continuity?
Yes
Repair or replace harness for short to ground circuit between DSC HU/CM terminal S and combined sensor terminal F, then go to Step 8.
No
Go to next step.
9
INSPECT COMBINED SENSOR
• Inspect combined sensor.
• Is it normal?
Yes
Go to next step.
No
Replace combined sensor, then go to next step.
10
VERIFY TROUBLESHOOTING COMPLETED
• Clear DTC from memory.
• Is the same DTC present?
Yes
Replace DSC HU/CM, then go to next step.
No
Go to next step.
11
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.