4BD6

4BD6-DYNAMICS SENSOR - INTERNAL

For a complete wiring diagram Consult Diagrams/Electrical





- When Monitored:
With the ignition on.

- Set Condition:
When the Anti-Lock Brakes Module detects a fault with the yaw rate within the Dynamics sensor.





Diagnostic Test

1. CHECK FOR A DTC 4BD6-DYNAMICS SENSOR - INTERNAL
NOTE: This DTC must be active for the results of this test to be valid.

Turn the ignition on.
With the scan tool, read and record ABS DTCs.
With the scan tool, read and record Environmental Data (EV Data).
With the scan tool, erase ABS DTCs.
Cycle the ignition switch.
Test drive the vehicle by turning the vehicle left or right in a curving manner at a velocity between 10 and 20 km/h (6 and 12 mph.).
Park the vehicle.
With the scan tool, read ABS DTCs.
Does the scan tool display: 4BD6-DYNAMICS SENSOR - INTERNAL?

Yes

- Go To 2

No

- Refer to the ABS-INTERMITTENT CONDITION TEST.

2. CHECK DYNAMICS SENSOR OUTPUT
Vehicle on level ground.
With scan tool monitor Lateral Sensor Signal, should display ± 0.3 G and the Yaw Sensor between ± 9°.
Drive vehicle and graph sensor while making sweeping left and right turns, left turns reading increases and right turns reading decreases and look for signal noise.
Were the readings within range and correspond accordingly?

Yes

- Go To 3

No

- Go To 6

3. INSPECT RELATED WIRING HARNESS, TERMINALS, & CONNECTORS
Check the Dynamics Sensor installation and torque the mounting bolts.
Visually inspect the related wiring harness. Look for any pinched, chafed, pierced, and partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, and corroded terminals.
Were any problems found?

Yes

- Repair as necessary.
- Perform ABS VERIFICATION TEST. Verification Tests.

No

- Go To 4

4. CHECK THE VOLTAGE ON THE DYNAMICS SENSOR SUPPLY CIRCUIT




Turn the ignition off.
Disconnect the Dynamics Sensor harness connector.
Turn the ignition on.
Measure the voltage of the Fused Ignition Switch Output circuit at the Dynamics Sensor harness connector.
Is the voltage above 10 volts?

Yes

- Go To 5

No

- Repair the Dynamic Sensor Supply circuit for an open.
- Perform ABS VERIFICATION TEST. Verification Tests.

5. CHECK DYNAMICS SENSOR GROUND CIRCUIT FOR AN OPEN




Turn the ignition off.
Measure the resistance between the Ground circuit and ground.
Is the resistance below 5.0 ohms?

Yes

- Go To 7

No

- Repair the Dynamics Sensor Ground circuit for an open.
- Perform ABS VERIFICATION TEST. Verification Tests.

6. CHECK THE DYNAMICS SENSOR INSTALLATION

NOTE: Dynamics Sensor installation and mounting bolt torque is crucial for proper operation.

Check the Dynamics Sensor for damaged, modified, and bent mounting brackets.
Check the Dynamics Sensor mounting bolts for a loose or over tightened condition.
Were any problems found?

Yes

- Repair as necessary.
- Perform ABS VERIFICATION TEST. Verification Tests.

No

- Replace the Dynamics Sensor.
- Perform ABS VERIFICATION TEST. Verification Tests.

7. DYNAMICS SENSOR
Replace the Dynamics Sensor.
Perform ABS VERIFICATION TEST. Verification Tests.

CAUTION: Ensure brake capability is available before road testing.

Road test the vehicle.
With the scan tool, read ABS diagnostics.
Did DTC 4BD6-DYNAMICS SENSOR - INTERNAL reset?

Yes

- Replace the Anti-Lock Brakes Module.
- Perform ABS VERIFICATION TEST. Verification Tests.

No

- Test complete.