DTC P1706 At Vehicle Speed Sensor Circuit Malfunction (Rear Wheel)

WARNING: This page is about a different variant/trim than selected.

DTC DETECTING CONDITION:

Input signal circuit of TCM is open or shorted.

TROUBLE SYMPTOM:

Shifting quality malfunction
Tight corner braking phenomenon occurs.

WIRING DIAGRAM:

Fig 1: AT Vehicle Speed Sensor - Wiring Diagram

G05019843

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK TCM I/O SIGNAL. Check I/O signal of power supply, ground and PVIGN power supply relay. < Ref. to ELECTRICAL SPECIFICATION , Transmission Control Module (TCM) I/O Signal. >	Is TCM I/O signal OK?	Go to step 2.	Repair the open or short circuit for power supply and ground. Perform the diagnosis according to DTC P0882 for PVIGN power supply relay.
2 CHECK TCM AND TRANSMISSION HARNESS CONNECTOR. Disconnect the connectors from TCM and transmission. Measure the resistance of harness between TCM connector and transmission connector. Connector & terminal (B55) No. 18 - (B12) No. 5: (B54) No. 16 - (B11) No. 7:	Is the resistance less than 1 Ω?	Go to step 3.	Repair the open circuit of harness between TCM and transmission connector.
3 CHECK TCM AND TRANSMISSION HARNESS CONNECTOR. Measure the resistance of harness between TCM connector and chassis ground. Connector & terminal (B54) No. 16 - Chassis ground: (B55) No. 18 - Chassis ground:	Is the resistance more than 1 MΩ?	Go to step 4.	Repair the short circuit of harness between TCM and transmission connector.
4 CHECK TCM POWER SUPPLY OUTPUT. Connect the connector to TCM. (Transmission connector is disconnected) Turn the ignition switch to ON. (engine OFF) Measure the voltage between transmission connector and chassis ground. Connector & terminal (B11) No. 7 (+) - Chassis ground (-):	Is the voltage 10 - 13 V?	Go to step 5.	Replace the TCM. < Ref. to TRANSMISSION CONTROL MODULE (TCM) . >
5 CHECK HARNESS ASSEMBLY (TURBINE SPEED SENSOR GROUND). Check the installing condition of ground connecting harness (used for both of turbine speed sensor 1, rear vehicle speed sensor).	Is the ground connecting harness installed to transmission body correctly, or the harness and connector terminals not damaged?	Go to step 6.	When the poor installation of ground connecting harness, install it securely. Replace the transmission assembly when the harness is damaged. < Ref. to AUTOMATIC TRANSMISSION ASSEMBLY . >
6 CHECK INPUT SIGNAL FOR TCM USING SUBARU SELECT MONITOR. Connect all connectors. Lift-up the vehicle and support with rigid racks. NOTE: Raise all wheels off floor. Start the engine, and drive the vehicle. Read the current data of front wheel speed using Subaru Select Monitor. < Ref. to OPERATION , Subaru Select Monitor. > NOTE: The speed difference between front and rear wheels may light the ABS warning light, but this does not indicate a malfunction. When AT control diagnosis is finished, perform the ABS memory clearance procedure of on-board diagnostics system. < Ref. to CLEAR MEMORY MODE , OPERATION, Subaru Select Monitor. >	Does the value of the front wheel speed depending on the acceleration and deceleration of the vehicle?	Even if the SPORT indicator light blinks, the system is in normal condition. A temporary poor contact of connector or harness may be the cause. Repair poor contact of harness in ATF temperature sensor and transmission connector.	Replace the transmission harness.