DTC 76 Lateral Accelerometer Signal: Notes

Lateral accelerometer circuit provides signal reflecting severity of vehicle turn (yaw forces on vehicle) to EBTCM. Information is used by EBTCM to modify control of rear wheel brakes to help prevent loss of control in a turn because of light brake pedal pressure at speeds greater than 30 MPH (50 KM/H).

DTC 76 will be set when accelerometer signal is out of acceptable range for 7.5 minutes or longer.

1. Checks if another ABS/ASR system problem is causing DTC 76.
2. Checks for correct accelerometer signal voltage in a no-turn (zero G force) condition.
3. Checks for correct accelerometer signal voltage at full left-hand turn. Full left-hand turn is simulated by exposing right side of accelerometer to gravity force of one G (standing accelerometer on right side).
4. Repairs other ABS/ASR DTC problems that may affect DTC 76, then checks for DTC reset.
5. Checks connectors and wiring for intermittents and/or shorts.
6. Checks for DTC 76 reset after replacing lateral accelerometer. If DTC 76 resets after replacing lateral accelerometer, EBTCM is interpreting a problem when it should not be. Continue diagnosis to determine faulty component or circuit.
7. Checks for correct accelerometer signal voltage at a full right-hand turn. Full right-hand turn is simulated by exposing left side of accelerometer to gravity force of one G (standing accelerometer on left side).
8. Checks for reset of DTC after inspecting most of system.
9. Checks if DTC 76 reset in step 8) is caused by lateral accelerometer. When road testing vehicle, DO NOT  make any severe turns that may cause Tech 1 scan tester to trigger DTC because of spiking signal from lateral accelerometer.
10. If lateral accelerometer was replaced in step 6), EBTCM is most likely at fault. If accelerometer was not replaced in step 6), it should be replaced before continuing diagnosis.
11. Checks for DTC reset during road test. If DTC continues to reset, EBTCM is detecting a fault when one does not exist.