GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 Tracker - 2WD 🢒 Engine 🢒 Engine Controls - 2.5L (LE8) 🢒 DTC P0707

Circuit Description

The transmission range switch sends gear position signals to the powertrain control module (PCM) according to the manual selector range position. The PCM uses this information in order to manage transmission operation.

Conditions for Setting the DTC
    • The transmission range switch signal (P, 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 P0707 stores.
    • The PCM enters fail-safe mode.
    • The malfunction indicator lamp (MIL) turns ON.

During fail-safe mode operation, the PCM 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 PCM:
       - An open
       - A short to voltage
       - A short to ground
    • A faulty PCM exists.

The following conditions may cause an intermittent condition:

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

Inspect the PCM 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 P0707 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 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 Powertrain 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 P, R, N, D, L ranges.

    3.

  3. This step tests for an intermittent condition.

    4.

  4. This step tests the voltage at the PCM connector.

    5.

  5. This step tests for resistance between the PCM and the transmission range switch connector.

    6.

  6. This step tests the circuits for an open or high resistance.

Step

Action

Value(s)

Yes

No

1

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

--

Go to Step 2

Go to Diagnostic System Check - Engine Controls in Engine Controls - 1.6L, Diagnostic System Check - Engine Controls in Engine Controls- 2.0L or Diagnostic System Check - Engine Controls in Engine Controls - 2.5L

2

  1. Install a scan tool.
  2. Turn ON the ignition, leaving the engine off.
  3. Apply the parking brake.
  4. Check the transmission range signal in P, R, N, D, 2, 1 on the scan tool.

Does the scan tool show that the transmission is in the indicated range?

--

Go to Step 3

Go to Step 4

3

Refer to Diagnostic Aids for a possible intermittent condition.

Is the procedure complete?

--

Go to Step 10

--

4
  1. Shift gear selector to Neutral position.
  2. Check that the "N" reference line on the switch and center line on the shaft are aligned.

Is the alignment correct?

--

Go to Step 5

Go to Step 11

5

  1. Turn the ignition switch to the LOCK position.
  2. Disconnect the PCM connector C3.
  3. Turn the ignition switch to the ON position.
  4. Shift the transmission to the gear position that failed.
  5. Measure the voltage at the PCM connector terminal that failed the functional test.

Is the voltage within the specified range?

10-14 V in gear

Go to Step 7

Go to Step 6

6
  1. Turn the ignition switch to the LOCK position.
  2. Disconnect the transmission range switch electrical connector.
  3. Measure the resistance between the failed PCM harness connector terminal and the corresponding transmission range switch connector terminal (harness side).

Is the resistance within the specified range?

2 ohms

Go to Step 9

Go to Step 8

7

Replace the powertrain control module (PCM) and recheck system operation. Refer to one of the following procedures:

    •  Powertrain Control Module Replacement in Engine Controls - 1.6L
    •  Powertrain Control Module Replacement in Engine Controls - 2.0L
    •  Powertrain Control Module Replacement in Engine Controls - 2.5L

Is the system operating properly?

--

Go to Step 10

Go to Step 1

8

Repair the open or the high resistance in the circuit between the transmission range switch and the PCM.

Is the repair complete?

--

Go to Step 10

--

9

Replace the transmission range switch.

Is the repair complete?

--

Go to Step 10

--

10
  1. Turn the ignition switch to the LOCK position.
  2. Reconnect any disconnected connectors.
  3. Perform the DTC Confirmation Procedure.

Does the scan tool display any DTC?

--

Go to the applicable DTC table

System OK

11

Adjust as necessary

Is the system operating properly?

 

System OK

Go to Step 2