PRE-RELEASE
DTC 56 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?
| Yes |
| No |
CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in connector between ABSCM&H/U and G sensor?
| Yes |
Repair the connector.
| No |
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?
| Yes |
Replace the ABSCM&H/U.
| No |
CHECK ANY OTHER DTC APPEARANCE.
Are other DTCs being output?
| Yes |
Proceed with the diagnosis corresponding to DTC.
| No |
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 V?
| Yes |
| No |
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 kΩ?
| Yes |
| No |
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 MΩ?
| Yes |
| No |
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 V when G sensor is in horizontal position?
| Yes |
| No |
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 V when G sensor is inclined forwards to 90°?
| Yes |
| No |
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 V when G sensor is inclined backwards to 90°?
| Yes |
| No |
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?
| Yes |
Repair the connector.
| No |
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?
| Yes |
Replace the ABSCM&H/U.
| No |
CHECK ANY OTHER DTC APPEARANCE.
Are other DTCs being output?
| Yes |
Proceed with the diagnosis corresponding to DTC.
| No |
A temporary poor contact.
