DTC P0705 Transmission Range Sensor Circuit (PRNDL Input)

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

DTC DETECTING CONDITION:

Inhibitor switch is faulty.
More than 2 range signal is input.

TROUBLE SYMPTOM:

Shift characteristics are erroneous.
Range position of select lever and AT select lever position indicator light on the combination meter is not matched.

WIRING DIAGRAM:

Fig 1: Wiring Diagram - Transmission Range Sensor Circuit

Courtesy of SUBARU OF AMERICA, INC.

DTC P0705 DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1. CHECK INDICATOR LIGHT. Turn the ignition switch to ON. Shift the select lever to "P" range.	Does the "P" range indicator light on combination meter illuminate?	Go to step 2 .	Go to step 12 .
2. CHECK INDICATOR LIGHT.	Does the "R" range indicator light on combination meter illuminate?	Go to step 26 .	Go to step 3 .
3. CHECK INDICATOR LIGHT.	Does the "N" range indicator light on combination meter illuminate?	Go to step 33 .	Go to step 4 .
4. CHECK INDICATOR LIGHT.	Does the "D" range indicator light on combination meter illuminate?	Go to step 40 .	Go to step 5 .
5. CHECK "P" RANGE SWITCH. Connect the Subaru Select Monitor to data link connector. Shift the select lever to "R" range.	Does the "P" range LED of Subaru Select Monitor illuminate?	Go to step 19 .	Go to step 6 .
6. CHECK INDICATOR LIGHT.	Does the "R" range indicator light on combination meter illuminate?	Go to step 8 .	Go to step 7 .
7. CHECK "R" RANGE SWITCH.	Does the "R" range LED of Subaru Select Monitor illuminate?	Go to step 23 .	Go to step 20 .
8. CHECK INDICATOR LIGHT. Shift the select lever to the "N" range.	Does the "P" range indicator light on combination meter illuminate?	Go to step 10 .	Go to step 9 .
9. CHECK "N" RANGE SWITCH.	Does the "N" range LED of Subaru Select Monitor illuminate?	Go to step 30 .	Go to step 27 .
10. CHECK INDICATOR LIGHT. Shift the select lever to "D" range.	Does the "D" range indicator light on combination meter illuminate?	Even if the SPORT indicator light is blinking, the circuit has returned to normal condition at this time. A temporary poor contact of connector or harness may be the cause. Repair the harness or connector in TCM and transmission.	Go to step 11 .
11. CHECK "D" RANGE SWITCH.	Does the "D" range LED of Subaru Select Monitor illuminate?	Go to step 37 .	Go to step 34 .
12. CHECK HARNESS CONNECTOR BETWEEN INHIBITOR SWITCH AND CHASSIS GROUND. Turn the ignition switch to OFF. Disconnect the connector from inhibitor switch. Measure the resistance of harness between inhibitor switch and chassis ground. Connector & terminal (T7) No. 5 - Chassis ground:	Is the resistance more than 1 Ω?	Go to step 13 .	Repair the open circuit in harness between inhibitor switch connector and chassis ground, and poor contact in coupling connector.
13. CHECK HARNESS CONNECTOR BETWEEN TCM AND INHIBITOR SWITCH. Turn the ignition switch to OFF. Disconnect the connector from TCM and inhibitor switch. Measure the resistance of harness between TCM and inhibitor switch connector. Connector & terminal (B54) No. 5 - (T7) No. 9:	Is the resistance less than 1 Ω?	Go to step 14 .	Repair the open circuit in harness between TCM and inhibitor switch connector, and poor contact in coupling connector.
14. CHECK INPUT SIGNAL FOR TCM. Turn the ignition switch to OFF. Connect the connector to TCM and inhibitor switch. Turn the ignition switch to ON. Shift the select lever to "P" range. Measure the voltage between TCM and chassis ground. Connector & terminal (B54) No. 5 (+) - Chassis ground (-):	Is the voltage less than 1 V?	Go to step 15 .	Go to step 41 .
15. CHECK INPUT SIGNAL FOR TCM. Shift the select lever to any range other than "P". Measure the voltage between TCM and chassis ground. Connector & terminal (B54) No. 5 (+) - Chassis ground (-):	Is the voltage more than 8 V?	Go to step 16 .	Replace the TCM. < Ref. to TRANSMISSION CONTROL MODULE (TCM) . >
16 CHECK BODY INTEGRATED UNIT. Read the data of the inhibitor switch from Subaru Select Monitor. < Ref. to , OPERATION , Subaru Select Monitor. >	Is "7" displayed?	Go to step 17 .	Check the body integrated unit.
17 CHECK BODY INTEGRATED UNIT. Check DTC of body integrated unit.	Is DTC of CAN communication displayed?	Perform the diagnosis according to DTC.	Go to step 18 .
18 CHECK COMBINATION METER. Check the "P" range indicator light. < Ref. to INSPECTION , Combination Meter System. >	Is the "P" range indicator light OK?	Go to step 41 .	Replace the combination meter assembly. < Ref. to COMBINATION METER . >
19 CHECK HARNESS CONNECTOR BETWEEN TCM AND INHIBITOR SWITCH. Turn the ignition switch to OFF. Disconnect the connectors from TCM, inhibitor switch and combination meter. Measure the resistance of harness between TCM connector and chassis ground. Connector & terminal (B54) No. 5 - Chassis ground:	Is the resistance more than 1 MΩ?	Go to step 42 .	Repair the ground short circuit in "P" range circuit.
20 CHECK HARNESS CONNECTOR BETWEEN TCM AND INHIBITOR SWITCH. Turn the ignition switch to OFF. Disconnect the connector from TCM and inhibitor switch. Measure the resistance of harness between TCM and inhibitor switch connector. Connector & terminal (B54) No. 14 - (T7) No. 8:	Is the resistance less than 1 Ω?	Go to step 21 .	Repair the open circuit in harness between TCM and inhibitor switch connector, and poor contact in coupling connector.
21 CHECK INPUT SIGNAL FOR TCM. Turn the ignition switch to OFF. Connect the connector to TCM and inhibitor switch. Turn the ignition switch to ON. Shift the select lever to "R" range. Measure the voltage between TCM and chassis ground. Connector & terminal (B54) No. 14 (+) - Chassis ground (-):	Is the voltage less than 1 V?	Go to step 22 .	Go to step 41 .
22 CHECK INPUT SIGNAL FOR TCM. Shift the select lever to other than "R" range. Measure the voltage between TCM and chassis ground. Connector & terminal (B54) No. 14 (+) - Chassis ground (-):	Is the voltage more than 8 V?	Go to step 41 .	Replace the TCM. < Ref. to TRANSMISSION CONTROL MODULE (TCM) . >
23 CHECK BODY INTEGRATED UNIT. Read the data of shift position from Subaru Select Monitor. < Ref. to , OPERATION , Subaru Select Monitor. >	Is "6" displayed?	Go to step 24 .	Check the body integrated unit.
24 CHECK BODY INTEGRATED UNIT. Check DTC of body integrated unit.	Is DTC of CAN communication displayed?	Perform the diagnosis according to DTC.	Go to step 25 .
25 CHECK COMBINATION METER. Check the "R" range indicator light. < Ref. to INSPECTION , Combination Meter System. >	Is the "R" range indicator light OK?	Go to step 41 .	Replace the combination meter assembly. < Ref. to COMBINATION METER . >
26 CHECK HARNESS CONNECTOR BETWEEN TCM AND INHIBITOR SWITCH. Turn the ignition switch to OFF. Disconnect the connectors from TCM, inhibitor switch and combination meter. Measure the resistance of harness between TCM connector and chassis ground. Connector & terminal (B54) No. 14 - Chassis ground:	Is the resistance more than 1 MΩ?	Go to step 41 .	Repair the ground short circuit in "R" range circuit.
27 CHECK HARNESS CONNECTOR BETWEEN TCM AND INHIBITOR SWITCH. Turn the ignition switch to OFF. Disconnect the connector from TCM and inhibitor switch. Measure the resistance of harness between TCM and inhibitor switch connector. Connector & terminal (B54) No. 22 - (77) No. 10:	Is the resistance less than 1 Ω?	Go to step 28 .	Repair the open circuit in harness between TCM and inhibitor switch connector, and poor contact in coupling connector.
28 CHECK INPUT SIGNAL FOR TCM. Turn the ignition switch to OFF. Connect the connector to TCM and inhibitor switch. Turn the ignition switch to ON. Shift the select lever to "N" range. Measure the voltage between TCM and chassis ground. Connector & terminal (B54) No. 22 (+) - Chassis ground (-):	Is the voltage less than 1 V?	Go to step 29 .	Go to step 41 .
29 CHECK INPUT SIGNAL FOR TCM. Shift the select lever to other than "N" range. Measure the voltage between TCM and chassis ground. Connector & terminal (B54) No. 22 (+) - Chassis ground (-):	Is the voltage more than 8 V?	Go to step 41 .	Replace the TCM. < Ref. to TRANSMISSION CONTROL MODULE (TCM) . >
30 CHECK BODY INTEGRATED UNIT. Read the data of shift position from Subaru Select Monitor. < Ref. to , OPERATION , Subaru Select Monitor. >	Is "5" displayed?	Go to step 31 .	Check the body integrated unit.
31 CHECK BODY INTEGRATED UNIT. Check DTC of body integrated unit.	Is DTC of CAN communication displayed?	Perform the diagnosis according to DTC.	Go to step 32 .
32 CHECK COMBINATION METER. Check the "N" range indicator light. < Ref. to INSPECTION , Combination Meter System. >	Is the "N" range indicator light OK?	Go to step 41 .	Replace the combination meter assembly. < Ref. to COMBINATION METER . >
33 CHECK HARNESS CONNECTOR BETWEEN TCM AND INHIBITOR SWITCH. Turn the ignition switch to OFF. Disconnect the connectors from TCM, inhibitor switch and combination meter. Measure the resistance of harness between TCM connector and chassis ground. Connector & terminal (B54) No. 22 - Chassis ground:	Is the resistance more than 1 MΩ?	Go to step 41 .	Repair the ground short circuit in "N" range circuit.
34 CHECK HARNESS CONNECTOR BETWEEN TCM AND INHIBITOR SWITCH. Turn the ignition switch to OFF. Disconnect the connector from TCM and inhibitor switch. Measure the resistance of harness between TCM and inhibitor switch connector. Connector & terminal (B54) No. 4 - (77) No. 3:	Is the resistance less than 1 Ω?	Go to step 35 .	Repair the open circuit in harness between TCM and inhibitor switch connector, and poor contact in coupling connector.
35 CHECK INPUT SIGNAL FOR TCM. Turn the ignition switch to OFF. Connect the connector to TCM and inhibitor switch. Turn the ignition switch to ON. Shift the select lever to "D" range. Measure the voltage between TCM and chassis ground. Connector & terminal (B54) No. 4 (+) - Chassis ground (-):	Is the voltage less than 1 V?	Go to step 36 .	Go to step 41 .
36 CHECK INPUT SIGNAL FOR TCM. Shift the select lever to other than "D" range. Measure the voltage between TCM and chassis ground. Connector & terminal (B54) No. 4 (+) - Chassis ground (-):	Is the voltage more than 8 V?	Go to step 41 .	Replace the TCM. < Ref. to TRANSMISSION CONTROL MODULE (TCM) . >
37 CHECK BODY INTEGRATED UNIT. Read the data of inhibitor switch from Subaru Select Monitor. < Ref. to , OPERATION , Subaru Select Monitor. >	Is "4" displayed?	Go to step 38 .	Check the body integrated unit.
38 CHECK BODY INTEGRATED UNIT. Check DTC of body integrated unit.	Is DTC of CAN communication displayed?	Perform the diagnosis according to the DTC.	Go to step 39 .
39 CHECK COMBINATION METER. Check the "D" range indicator light. < Ref. to INSPECTION , Combination Meter System. >	Is the "D" range indicator light OK?	Go to step 41 .	Replace the combination meter assembly. < Ref. to COMBINATION METER . >
40 CHECK HARNESS CONNECTOR BETWEEN TCM AND INHIBITOR SWITCH. Turn the ignition switch to OFF. Disconnect the connectors from TCM, inhibitor switch and combination meter. Measure the resistance of harness between TCM connector and chassis ground. Connector & terminal (B54) No. 4 - Chassis ground:	Is the resistance more than 1 MΩ?	Go to step 41 .	Repair the ground short circuit in "D" range circuit.
41 CHECK POOR CONTACT.	Is there poor contact in inhibitor switch circuit?	Repair the poor contact.	Go to step 42 .
42 CHECK INHIBITOR SWITCH.	Is the inhibitor switch in normal position?	Replace the TCM. < Ref. to TRANSMISSION CONTROL MODULE (TCM) . >	Adjust inhibitor switch and select cable. < Ref. to INHIBITOR SWITCH .> and < Ref. to SELECT CABLE . >