C1242

C1242-GSENSOR INPUT SIGNAL PERFORMANCE

- When Monitored:

Continuously after power-on reset until vehicle speed exceeds 12.4 mph/20 kph for the first time, but not if the sensor voltage is out of range,

Or, during diagnostic mode.

Or, if the monitoring was inhibited by a corresponding diagnostics command.

Or, if the vehicle speed has exceeded 12.4 mph/20 kph during the actual ignition cycle.

Or, if at least one overspinning wheel is detected.

Or, if one of the control functions is active.

- Set Condition:

A failure is detected if the measured acceleration signal is higher than 0.8 g longer than the specified detection time.






1. VERIFY DTC IS ACTIVE

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.

WARNING: Ensure brake capability is available before road testing.

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 this DTC reset?

Yes

- Go To 2

No

- Refer to the ABS-INTERMITTENT CONDITION TEST. Component Tests and General Diagnostics

2. CHECK THE DYNAMICS SENSOR INSTALLATION

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

Turn the ignition off.
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. ABS Verification Test

No

- Go To 3

3. INSPECT RELATED WIRING HARNESS, TERMINALS, & CONNECTORS

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. ABS Verification Test

No

- Go To 4

4. REPLACE DYNAMICS SENSOR & VERIFY IF DTC IS STILL ACTIVE

Replace the Dynamics Sensor.
Turn the ignition on.
With the scan tool, erase ABS DTCs.

WARNING: Ensure brake capability is available before road testing.

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 this DTC reset?

Yes

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

No

- Perform ABS VERIFICATION TEST. ABS Verification Test