GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Geo 🢒 1996 🢒 Tracker - 4WD 🢒 DTC 🢒 DTC P0705 Trans Range Switch Circuit

Object Number: 1568718 Size: SF
Automatic Transmission Controls Schematics

Circuit Description

The transmission range switch sends gear position signals to the Transmission Control Module (TCM) according to the manual selector range position. The TCM uses this information in order to manage transmission operation.

Conditions for Setting the DTC
    • The transmission range switch signal (R, N, D, 2 or L) does not input for 25 seconds at 60 km/h (38 mph) or higher vehicle speed in DRIVE range.
    • Multiple signals input simultaneously for 25 seconds.
    • Two driving cycle detection logic

Action Taken When the DTC Sets
    •  DTC P0705 stores.
    • The TCM enters fail-safe mode.
    • The Malfunction Indicator Lamp (MIL) turns ON.

During fail-safe mode operation, the TCM controls the shift solenoids and the Torque Converter Clutch (TCC) solenoid based on the DRIVE range when no signal inputs from the transmission range switch are seen.

Diagnostic Aids

Inspect for the following conditions:

    • The transmission range switch is out of adjustment.
    • A transmission range switch malfunction exists.
    • The following faulty electrical circuits exist between the transmission range switch and the TCM:
       - An open
       - A short to voltage
       - A short to ground
    • A faulty TCM exists.

The following conditions may cause an intermittent condition:

    • A reduced connection
    • Rubbed through wire insulation
    • A broken wire inside the insulation

Inspect the TCM harness connectors for the following conditions:

    • Backed out terminals
    • Improper mating
    • Broken locks
    • Improperly formed or damaged terminals
    • Reduced terminal-to-wire connections

If DTC P0705 cannot duplicate, the information included in the Freeze Frame data may be useful in determining the vehicle operating conditions when the DTC set.

Refer to the figure for cavity terminal identification when inspecting the transmission range switch.

Refer to Wiring Repairs in Wiring Systems when repairing any wiring.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. The On-Board Diagnostic (OBD) System Check prompts the technician to complete some basic checks and store the freeze frame data on the Scan Tool if applicable. The scan tool creates an electronic copy of the data taken when the fault occurred. The information then stores in the Scan Tool for later reference.

    2.

  2. This step tests the transaxle range switch in the D range.

    3.

  3. This step tests the transaxle range switch in the L range.

    4.

  4. This step tests the transaxle range switch in the N range.

    5.

  5. This step tests the transaxle range switch in the 2 range.

    6.

  6. This step tests the transaxle range switch in the R range.

    7.

  7. This step inspects for reduced terminal contact at the TCM.

    8.

  8. This step tests for a faulty TCM.

    9.

  9. This step tests for a short to voltage in the D position.

    10.

  10. This step tests for a short to ground in the D position.

    11.

  11. This step tests for an open in the D position.

    12.

  12. This step tests for an open in the YEL wire.

    13.

  13. This step tests for a short to voltage in the L position.

    14.

  14. This step tests for a short to ground in the L position.

    15.

  15. This step tests for an open in the L position.

    16.

  16. This step tests for a short to voltage in the N position.

    17.

  17. This step tests for a short to ground in the N position.

    18.

  18. This step tests for an open in the N position.

    19.

  19. This step tests for a short to voltage in the 2 position.

  1. This step tests for a short to ground in the 2 position.

    2.

  2. This step tests for an open in the 2 position.

    3.

  3. This step tests for a short to voltage in the R position.

    4.

  4. This step tests for a short to ground in the R position.

    5.

  5. This step tests for an open in the R position.

Step

Action

Value(s)

Yes

No

1

Was the On-Board Diagnostic (OBD) System Check performed?

--

Go to Step 2

Go to On-Board Diagnostic System Check in Engine Controls

2

  1. Turn the ignition switch to the LOCK position.
  2. Disconnect the TCM connector.
  3. Turn the ignition switch to the ON position.
  4. Use J 39200 in order to measure the voltage between ground and the TCM harness connector terminal 9 when shifting the manual selector from Park P) to Low (L) range.

Is the voltage within the specified range?

10-14 V in Drive (D) range

0-2 V in all other ranges

Go to Step 3

Go to Step 8

3

Use J 39200 in order to measure the voltage between ground and the TCM harness connector terminal 23 with the manual selector in Low (L) range.

Is the voltage within the specified range?

10-14 V in Low (L) range

Go to Step 4

Go to Step 12

4

Use J 39200 in order to measure the voltage between ground and the TCM harness connector terminal 22 when shifting the manual selector from Low (L) to Neutral (N) range.

Is the voltage within the specified range?

10-14 V in Low (L) range

Go to Step 5

Go to Step 15

5

Use J 39200 in order to measure the voltage between ground and the TCM harness connector terminal 21 when shifting the manual selector from Neutral (N) to Second (2) range.

Is the voltage within the specified range?

10-14 V in Second (2) range

Go to Step 6

Go to Step 18

6

Inspect the TCM harness connector for reduced terminal contact.

Does reduced terminal contact exist?

--

Go to Step 22

Go to Step 7

7

  1. Shift the manual selector to the Park (P) range.
  2. Turn the ignition switch to the LOCK position.
  3. Install a known-good TCM
  4. Perform the DTC Confirmation Procedure.

Does DTC P0705 reset?

--

Go to Step 23

Go to Step 21

8

  1. Turn the ignition switch to the RUN position.
  2. Disconnect the transmission range switch electrical connector.
  3. Turn the ignition switch to the ON position.
  4. Use the J 39200 in order to measure the voltage between ground and the TCM harness connector terminal 9.

Is the voltage within the specified range?

0.5-14.0 V

Go to Step 25

Go to Step 9

9

Use J 39200 in order to measure the resistance between ground and the TCM harness connector terminal 9.

Is the resistance within the specified range?

Infinite

Go to Step 10

Go to Step 26

10

Use J 39200 in order to measure the resistance between the TCM harness connector terminal 9 and the transmission range switch connector terminal 9 (harness side).

Is the resistance less than the specified value?

2 ohms

Go to Step 11

Go to Step 27

11

Use J 39200 in order to measure the voltage between ground and the transmission range switch connector terminal 6 (harness side).

Is the voltage within the specified range?

10-14 V

Go to Step 24

Go to Step 26

12

  1. Turn the ignition switch to the LOCK position.
  2. Disconnect the transmission range switch electrical connector.
  3. Turn the ignition switch to the ON position.
  4. Use J 39200 in order to measure the voltage between ground and the TCM harness connector terminal 23.

Is the voltage within the specified range?

0.5-14.0 V

Go to Step 29

Go to Step 13

13

Use J 39200 in order to measure the resistance between ground and the TCM harness connector terminal 23.

Is the resistance within the specified range?

Infinite

Go to Step 14

Go to Step 30

14

Use J 39200 in order to measure the resistance between the TCM harness connector terminal 23 and the transmission range switch connector terminal 5 (harness side).

Is the resistance less than the specified value?

2 ohms

Go to Step 11

Go to Step 31

15

  1. Turn the ignition switch to the LOCK position.
  2. Disconnect the transmission range switch electrical connector.
  3. Turn the ignition switch to the ON position.
  4. Use J 39200 in order to measure the voltage between ground and the TCM harness connector terminal 22.

Is the voltage within the specified range?

0.5-14.0 V

Go to Step 32

Go to Step 16

16

Use the J 39200 in order to measure the resistance between ground and the TCM harness connector terminal 22.

Is the resistance within the specified range?

Infinite

Go to Step 17

Go to Step 33

17

Use J 39200 in order to measure the resistance between the TCM harness connector terminal 22 and the transmission range switch connector terminal 10 (harness side).

Is the resistance less than the specified value?

2 ohms

Go to Step 11

Go to Step 34

18

  1. Turn the ignition switch to the LOCK position.
  2. Disconnect the transmission range switch electrical connector.
  3. Turn the ignition switch to the ON position.
  4. Use J 39200 in order to measure the voltage between ground and the TCM harness connector terminal 21.

Is the voltage within the specified range?

0.5-14.0 V

Go to Step 35

Go to Step 19

19

Use J 39200 in order to measure the resistance between ground and the TCM harness connector terminal 21.

Is the resistance within the specified range?

Infinite

Go to Step 20

Go to Step 36

20

Use J 39200 in order to measure the resistance between the TCM harness connector terminal 21 and the transmission range switch connector terminal 4 (harness side).

Is the resistance less than the specified value?

2 ohms

Go to Step 11

Go to Step 37

21

Refer to Diagnostic Aids for a possible intermittent condition. If OK, replace the Transmission Control Module (TCM).

Is the procedure complete?

--

Go to Step 38

--

22

Repair any terminal that exhibits reduced contact.

Is the repair complete?

--

Go to Step 38

--

23

Refer to Diagnostic Aids for additional information about DTC P0705.

Is the action complete?

--

Go to Step 38

--

24

Inspect the transmission range switch for proper alignment. If the alignment is OK, then replace the transmission range switch.

Is the procedure complete?

--

Go to Step 38

--

25

Repair the short to voltage in the GRN wire between the transmission range switch and the TCM.

Is the repair complete?

--

Go to Step 38

--

26

Repair the short to ground in the GRN wire between the transmission range switch and the TCM.

Is the repair complete?

--

Go to Step 38

--

27

Repair the open or the high resistance in the GRN wire between the transmission range switch and the TCM.

Is the repair complete?

--

Go to Step 38

--

28

Repair the open or the high resistance in the YEL wire between the transmission range switch and the TURN BACK fuse. Refer to Automatic Transmission Controls Schematics .

Is the repair complete?

--

Go to Step 38

--

29

Repair the short to voltage in the GRN/BLU wire and/or the YEL/BLU wire between the transmission range switch and the TCM.

Is the repair complete?

--

Go to Step 38

--

30

Repair the short to ground in the GRN/BLU wire and/or the YEL/BLU wire between the transmission range switch and the TCM.

Is the repair complete?

--

Go to Step 38

--

31

Repair the open or the high resistance in the GRN/BLU wire and/or the YEL/BLU wire between the transmission range switch and the TCM.

Is the repair complete?

--

Go to Step 38

--

32

Repair the short to voltage in the ORN/BLU wire and/or the BLU/GRN wire between the transmission range switch and the TCM.

Is the repair complete?

--

Go to Step 38

--

33

Repair the short to ground in the ORN/BLU wire and/or the BLU/GRN wire between the transmission range switch and the TCM.

Is the repair complete?

--

Go to Step 38

--

34

Repair the open or the high resistance in the ORN/BLU wire and/or the BLU/GRN wire between the transmission range switch and the TCM.

Is the repair complete?

--

Go to Step 38

--

35

Repair the short to voltage in the GRN/RED wire and/or the YEL/GRN wire between the transmission range switch and the TCM.

Is the repair complete?

--

Go to Step 38

--

36

Repair the short to ground in the GRN/RED wire and/or the YEL/GRN wire between the transmission range switch and the TCM.

Is the repair complete?

--

Go to Step 38

--

37

Repair the open or the high resistance in the GRN/RED wire and/or the YEL/GRN wire between the transmission range switch and the TCM.

Is the repair complete?

--

Go to Step 38

--

38
  1. Turn the ignition switch to the LOCK position.
  2. Reconnect the connector(s).
  3. Perform the DTC Confirmation Procedure.

Does the scan tool display any DTC(s)?

--

Go to the applicable DTC table

System OK