Open or Short Circuit In G Sensor Circuit

DTC 56 OPEN OR SHORT CIRCUIT IN G SENSOR CIRCUIT
DIAGNOSIS:
Faulty G sensor output voltage

TROUBLE SYMPTOM:
ABS does not operate.

WIRING DIAGRAM:





CHECK OUTPUT OF G SENSOR USING Vehicle Diagnostic Interface.
Select "Current data display & Save" on the Vehicle Diagnostic Interface.
Read the G sensor output in Vehicle Diagnostic Interface data display.
Is the G sensor output on monitor display -1.25 - 1.25 m/s when G sensor is in horizontal position?

CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in connector between ABSCM&H/U and G sensor?
Repair the connector.

CHECK ABSCM&H/U.
Connect all connectors.
Erase the memory.
Perform the inspection mode.
Read out the DTC.
Is the same DTC as in the current diagnosis still being output?
Replace the ABSCM&H/U.

CHECK ANY OTHER DTC APPEARANCE.
Are other DTCs being output?
Proceed with the diagnosis corresponding to DTC.
A temporary poor contact.

CHECK INPUT VOLTAGE OF G SENSOR.
Turn the ignition switch to OFF.
Remove the console box.
Remove the G sensor from vehicle. (Do not disconnect connector.)
Turn the ignition switch to ON.
Measure the voltage between G sensor connector terminals.
Connector & terminal
(B292) No. 1 (+) - No. 3
Is the voltage 4.75 - 5.25 Volts?
Repair the harness/connector between G sensor and ABSCM&H/U.

CHECK OPEN CIRCUIT IN G SENSOR OUTPUT HARNESS AND GROUND HARNESS.
Turn the ignition switch to OFF.
Disconnect the connector from ABSCM& H/U.
Measure the resistance between ABSCM&H/U connector terminals.
Connector & terminal
(B301) No. 10 - No. 21:
Is the resistance 5.0 - 5.6 kOhms?
Repair the harness/connector between G sensor and ABSCM&H/U.

CHECK GROUND SHORT IN G SENSOR OUTPUT HARNESS.
Disconnect the connector from G sensor.
Measure the resistance between ABSCM&H/U connector and chassis ground.
Connector & terminal
(B301) No. 21 - Chassis ground:
Is the resistance more than 1 MOhms?
Repair the harness between G sensor and ABSCM&H/U.

CHECK G SENSOR.
Connect the connector to G sensor.
Connect the connector to ABSCM&H/U.
Turn the ignition switch to ON.
Measure the voltage between G sensor connector terminals.
Connector & terminal
(B292) No. 2 (+) - No. 3
Is the voltage 2.1 - 2.5 Volts when G sensor is in horizontal position?
Replace the G sensor.

CHECK G SENSOR.
Measure the voltage between G sensor connector terminals.
Connector & terminal
(B292) No. 2 (+) - No. 3
Is the voltage 3.7 - 4.1 Volts when G sensor is inclined forwards to 90°?
Replace the G sensor.

CHECK G SENSOR.
Measure the voltage between G sensor connector terminals.
Connector & terminal
(B292) No. 2 (+) - No. 3
Is the voltage 0.5 - 0.9 Volts when G sensor is inclined backwards to 90°?
Replace the G sensor.

CHECK POOR CONTACT IN CONNECTORS.
Turn the ignition switch to OFF.
Is there poor contact in connector between ABSCM&H/U and G sensor?
Repair the connector.

CHECK ABSCM&H/U.
Connect all connectors.
Erase the memory.
Perform the inspection mode.
Read out the DTC.
Is the same DTC as in current diagnosis still being output?
Replace the ABSCM&H/U.

CHECK ANY OTHER DTC APPEARANCE.
Are other DTCs being output?
Proceed with the diagnosis corresponding to DTC.
A temporary poor contact.