Subaru Crosstrek Service Manual: Dtc p0705 transmission range sensor "a" circuit (prndl input)

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

• Shift characteristics are erroneous.

• The range position of the select lever and the position of shift indicator display do not match.

Use the check board when measuring the TCM terminal voltage and resistance.

1.CHECK INPUT SIGNAL FOR TCM.

1) Turn the ignition switch to ON.

2) Move the select lever to each range, and read the data of «P Range», «R Range Signal», «N Range» and «D Range Signal» using the Subaru Select Monitor.

Is display “OFF” for the range other than corresponding range?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0705 TRANSMISSION RANGE SENSOR "A" CIRCUIT (PRNDL INPUT)">Go to Step 5.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0705 TRANSMISSION RANGE SENSOR "A" CIRCUIT (PRNDL INPUT)">Go to Step 2.

2.CHECK HARNESS.

1) Turn the ignition switch to OFF.

2) Disconnect the TCM connector.

3) Disconnect the transmission connector.

4) Measure the resistance between TCM connector and chassis ground.

Connector & terminal

(B54) No. 38 — Chassis ground:

(B54) No. 37 — Chassis ground:

(B54) No. 36 — Chassis ground:

(B54) No. 35 — Chassis ground:

Is each resistance 1 M? or more?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0705 TRANSMISSION RANGE SENSOR "A" CIRCUIT (PRNDL INPUT)">Go to Step 3.

Repair the short circuit of body harness.

3.CHECK HARNESS.

1) Disconnect the inhibitor switch connector.

2) Measure the resistance between transmission connector and chassis ground.

Connector & terminal

(T3) No. 1 — Chassis ground:

(T3) No. 2 — Chassis ground:

(T3) No. 3 — Chassis ground:

(T3) No. 4 — Chassis ground:

Is each resistance 1 M? or more?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0705 TRANSMISSION RANGE SENSOR "A" CIRCUIT (PRNDL INPUT)">Go to Step 4.

Repair the short circuit of transmission harness.

4.CHECK INHIBITOR SWITCH.

Move the select lever to each range, and measure the resistance between inhibitor switch terminals.

Terminals

No. 2 — No. 1:

No. 5 — No. 1:

No. 3 — No. 1:

No. 4 — No. 1:

Is the resistance other than corresponding range 1 M? or more?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0705 TRANSMISSION RANGE SENSOR "A" CIRCUIT (PRNDL INPUT)">Go to Step 5.

Replace the inhibitor switch. Inhibitor Switch">

5.CHECK FOR POOR CONTACT.

Is there poor contact between TCM, inhibitor switch, transmission ground?

Repair the poor contact.

Replace the TCM. Transmission Control Module (TCM)">

• Detect the malfunction of Range Switch.

• Judge as NG if more than one input of Range Switch are detected.

“Transmission range switch ON” is defined as transmission range switch input voltage < 1.7 V.

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