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Home >> Subaru >> 2006 >> Legacy GT spec.B >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (Automatic Transmission (Diagnostics) 5AT) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0705 Transmission Range Sensor Circuit (PRNDL Input)

DTC P0705 Transmission Range Sensor Circuit (PRNDL Input)

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

DTC DETECTING CONDITION: 

The inhibitor switch is open or short.

TROUBLE SYMPTOM: 

WIRING DIAGRAM: 

Fig 1: Transmission Range Sensor - Wiring Diagram
G05019818
RESISTANCE CHART

Step Check Yes No
1 CHECK DTC OF TCM.  Is DTC of AT CAN communication circuit displayed? Perform the diagnosis according to DTC. Go to step 2. 
2 CHECK INHIBITOR SWITCH. 
  1. Shift the select lever to "P" range.
  2. Check input signal of inhibitor SW 1 - 4 and inhibitor SW 3 monitor using Subaru Select Monitor.
 Is all displayed "High"? Go to step 4.  Go to step 3. 
3 CHECK HARNESS CONNECTOR BETWEEN TCM AND TRANSMISSION. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connectors from TCM and transmission.
  3. Measure the resistance between TCM connector and chassis ground about the item which indicated Low on step 3.

    Connector & terminal 

    (B55) No. 4 - Chassis ground: 

    (B55) No. 3 - Chassis ground: 

    (B55) No. 14 - Chassis ground: 

    (B55) No. 13 - Chassis ground: 

    (B55) No. 20 - Chassis ground: 

 Is the resistance more than 1 MΩ? Go to step 6.  Repair the short circuit of harness between TCM connector and chassis ground.
4 CHECK INHIBITOR SWITCH. 
  1. Shift the select lever to "D" range.
  2. Check input signal of inhibitor SW 1 - 4 and inhibitor SW 3 monitor using Subaru Select Monitor.
 Is all displayed Low? Go to step 6.  Go to step 5. 
5 CHECK HARNESS CONNECTOR BETWEEN TCM AND TRANSMISSION. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connectors from TCM and transmission.
  3. Measure the resistance of harness between TCM and transmission connector about the item which indicated High on step 5.

    Connector & terminal 

    (B55) No. 4 - (B12) No. 4: 

    (B55) No. 3 - (B12) No. 3: 

    (B55) No. 14 - (B12) No. 2: 

    (B55) No. 13 - (B12) No. 1: 

    (B55) No. 20 - (B12) No. 8: 

 Is the resistance less than 1 Ω? Go to step 6.  Repair the open circuit of harness between TCM connector and transmission connector.
6 CHECK INPUT SIGNAL FOR TCM USING CIRCUIT TESTER. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the transmission connector (B12).
  3. Connect the TCM connector.
  4. Turn the ignition switch to ON.
  5. Measure the voltage between TCM terminals.

    Connector & terminal 

    (B55) No. 4 - (B54) No. 19: 

    (B55) No. 3 - (B54) No. 19: 

    (B55) No. 14 - (B54) No. 19: 

    (B55) No. 13 - (B54) No. 19: 

    (B55) No. 20 - (B54) No. 19: 

 Is the voltage 4 - 6 V for the inhibitor SW 1 - 4? Is the voltage 3.5 - 5.5 V for the inhibitor SW 3 monitor? Go to step 8.  Go to step 7. 
7 CHECK TCM I/O SIGNAL. 
Check I/O signal of power supply, ground and PVIGN power supply relay.
< Ref. to ELECTRICAL SPECIFICATION  . >		 Is TCM I/O signal OK? Replace the TCM. < Ref. to TRANSMISSION CONTROL MODULE (TCM) . > Repair the open or short circuit for power supply and ground. Perform the diagnosis according to DTC for PVIGN power supply relay.
8 CHECK HARNESS CONNECTOR BETWEEN TRANSMISSION AND CONTROL VALVE BODY. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from transmission.
  3. Remove the transmission connector from bracket.
  4. Lift up the vehicle and place it on rigid racks.
    NOTE: Raise all wheels off floor.
  5. Drain the ATF.
    CAUTION: Do not drain ATF until it cools down.
  6. Remove the oil pan, and disconnect the connector from control valve body connector.
  7. Measure the resistance between transmission connector and control valve body connector.

    Connector & terminal 

    (T3) No. 4 - (T5) No. 6: 

    (T3) No. 3 - (T5) No. 5: 

    (T3) No. 2 - (T5) No. 4: 

    (T3) No. 1 - (T5) No. 3: 

    (T3) No. 8 - (T5) No. 2: 

 Is the resistance less than 1 Ω? Go to step 9.  Repair the open circuit of harness between control valve body connector and transmission connector.
9 CHECK HARNESS CONNECTOR BETWEEN TRANSMISSION AND CONTROL VALVE BODY. 
Measure the resistance between transmission ground and control valve body connector.
Connector & terminal 
(T5) No. 6 - Transmission ground: 
(T5) No. 5 - Transmission ground: 
(T5) No. 4 - Transmission ground: 
(T5) No. 3 - Transmission ground: 
(T5) No. 2 - Transmission ground: 		 Is the resistance more than 1 MΩ? Go to step 10  . Repair the short circuit of harness between control valve body connector and transmission connector.
10 CHECK POOR CONTACT.  Is there any poor contact in inhibitor SW 1 - 4 or inhibitor SW 3 monitor circuit? Repair the poor contact. Replace the control valve body. < Ref. to CONTROL VALVE BODY . >
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