AUTOMATIC TRANSMISSION (DIAGNOSTICS)(4AT) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P1706 AT VEHICLE SPEED SENSOR CIRCUIT MALFUNCTION (REAR WHEEL)

DTC DETECTING CONDITION:

Input signal circuit of TCM is open or shorted.

TROUBLE SYMPTOM:

No lock up or tight corner braking phenomenon is occurred.

WIRING DIAGRAM:

STEPCHECKYESNO

1.CHECK IGNITION POWER SUPPLY CIRCUIT.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from rear vehicle speed sensor.

3) Turn the ignition switch to ON.

4) Measure the ignition power supply voltage between rear vehicle speed sensor connector and transmission ground.

Connector & terminal

(AT4) No. 3 (+) — Transmission ground (−):

Is the voltage 10 V or more?

Check for open circuits, shorts or poor contact in the harness between the rear vehicle speed sensor and battery, and perform repairs.

2.CHECK HARNESS CONNECTOR BETWEEN TCM AND TRANSMISSION.

1) Turn the ignition switch to OFF.

2) Measure the resistance of harness between TCM connector and rear vehicle speed sensor connector.

Connector & terminal

(B55) No. 15 — (AT4) No. 1:

Is the resistance less than 1 Ω?

Repair the open circuit or poor contact of the connector in harness between TCM and rear vehicle speed sensor connector.

3.CHECK HARNESS CONNECTOR BETWEEN TCM AND TRANSMISSION.

Measure the resistance of harness between TCM connector and rear vehicle speed sensor connector.

Connector & terminal

(B55) No. 26 — (AT4) No. 2:

Is the resistance less than 1 Ω?

Repair the open circuit or poor contact of the connector in harness between TCM and rear vehicle speed sensor connector.

4.CHECK HARNESS CONNECTOR BETWEEN TCM AND TRANSMISSION.

Measure the resistance of the harness between TCM connector and chassis ground.

Connector & terminal

(B55) No. 15 — Chassis ground:

Is the resistance 1 MΩ or more?

Repair the short circuit of harness between TCM and rear vehicle speed sensor connector.

5.CHECK HARNESS CONNECTOR BETWEEN TCM AND TRANSMISSION.

Measure the resistance of the harness between TCM connector and chassis ground.

Connector & terminal

(B55) No. 26 — Chassis ground:

Is the resistance 1 MΩ or more?

Repair the short circuit of harness between TCM and rear vehicle speed sensor connector.

6.CHECK INPUT SIGNAL FOR TCM.

1) Connect the connectors to TCM and transmission.

2) Lift up the vehicle.

3) Start the engine and drive the vehicle at 20 km/h (12 MPH).

NOTE:

The speed difference between the front and rear wheels will illuminate the ABS warning light or VDC warning light, but this does not indicate a malfunction. If the warning light illuminates, delete the ABS or VDC memory after completing the AT control diagnosis.

4) Measure the AC voltage between TCM connector terminals.

Connector & terminal

(B55) No. 26 (+) — No. 15 (−):

Is the voltage approx. 2 V or more?

Replace the rear vehicle speed sensor.

7.CHECK FOR POOR CONTACT.

Is there poor contact in rear vehicle speed sensor circuit?

Repair the poor contact.

Replace the TCM.