C1283 Yaw rate & Lateral G Sensor Signal

COMPONENT LOCATION

img

GENERAL DESCRIPTION
When the vehicle is turning with respect to a vertical axis, the yaw rate sensor detects the yaw rate electronically by the vibration change of plate fork inside the yaw rate sensor.
If yaw velocity reaches the specific velocity after it detects the vehicle’ yawing, the ESP control is reactivated.
The lateral G sensor senses vehicle’s lateral G. A small element inside the sensor is attached to a deflectable lever arm by lateral G.
Direction and magnitude of lateral G loaded to vehicle can be known with electrostatic capacity changing according to lateral G.
DTC DESCRIPTION
A failure is detected if the Yaw rate & lateral G sensor’s message was not received or HECU detects CAN Bus off state for more than the specified failure detection time.
DTC DETECTING CONDITION
 
ItemDetecting ConditionPossible cause
Case1DTC
Strategy
Yaw rate & lateral G sensor message monitoring
Faulty Yaw Rate & Lateral G sensor
Open or short of Yaw Rate & Lateral G sensor
Enable
Conditions
In case that Yaw rate & lateral G sensor message was not received for more than 500ms within normal voltage condition.
Case2DTC
Strategy
Open, short monitoring
Enable
Conditions
In case sensor CAN BUS off state continued for more than 100ms.
Fail Safe
Inhibit the ESP control and allow the ABS/EBD control.
The ESP warning lamp is activated.
DIAGNOSTIC CIRCUIT DIAGRAM

img

 

TERMINAL AND CONNECTOR INSPECTION
1.
Many malfunctions in the electrical system are caused by poor harness(es) and terminal condition. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3.
Has a problem been found?
 

img

▶ Repair as necessary .

img

▶ Go to “Power Circuit Inspection” procedure.
POWER CIRCUIT INSPECTION
■ Open or Short Check
1.
Ignition “ON” & Engine “OFF”.
2.
Measure voltage between power terminal of the Yaw Rate & Lateral G sensor harness connector and chassis ground.
 Approx. 12V

img

3.
Is the measured value within specifications?
 

img

▶ Go to “Ground Circuit Inspection” procedure.

img

▶ Repair open or short in power circuit between the yaw rate & lateral G sensor harness connector and HECU harness connector.
GROUND CIRCUIT INSPECTION
■ Open or Short Check
1.
Ignition “OFF” & Engine “OFF”.
2.
Disconnect yaw rate & lateral G sensor connector.
3.
Measure resistance between ground terminal of the yaw rate & lateral G sensor harness connector and chassis ground.
 Approx. below 1Ω

img

4.
Is the measured value within specifications?
 

img

▶ Go to “Signal Circuit Inspection” procedure.

img

▶ Repair open or short in ground circuit between the yaw rate & lateral G sensor harness connector and HECU harness connector 
SIGNAL CIRCUIT INSPECTION
■ Short Check (to ground)
1.
Ignition “OFF” & Engine “OFF”.
2.
Disconnect yaw rate & lateral G sensor, HECU connector.
3.
Measure resistance between CAN LOW terminal (CAN HIGH terminal) of the yaw rate & lateral G sensor harness connector and chassis ground.
 ∞ Ω

img

4.
Is the measured value within specifications?
 

img

▶ Go to next procedure.

img

▶ Repair short to ground in CAN signal circuit in case of abnormal resistance measured 
■ Short Check (to battery)
1.
Ignition “ON” & Engine “OFF”.
2.
Disconnect HECU connector.
3.
Measure voltage between CAN LOW terminal (CAN HIGH terminal) of the HECU harness connector and chassis ground.
 Approx. 0 V

img

4.
Is the measured value within specifications?
 

img

▶ Go to “Component Inspection” procedure.

img

▶ Repair short to battery in CAN signal circuit in case of abnormal voltage measured

New Videos on our YouTube Channel Every Week, Subscribe Now!

Shopping Cart
Scroll to Top