P0705

Circuit Description
- The range switch supplies the Powertrain Control Module (PCM) with information regarding the selector lever position: P, R, N, D 3, 2 or L. The selector lever position is indicated by the state of four ON/OFF contracts. The range switch is located on one side of the transmission. It is on the transmission manual shaft and is fixed to the main case.
- The range switch is also used to provide the information P or N to the engine crank wiring. The engine can be cranked only if connector M-16 terminal 4(H) is connected to terminal 1(E) which is connected to ground.
- The range switch is also used to provide the backup lamp power in reverse. This is the reason why the range switch is supplied through a 1 SA fuse (CB-1 5). This fuse can burn due to a short circuit in the back up lamp.
This DTC detects when a fuse is open or the range switch circuit does not work. This is a type "D" DTC.

Conditions For Setting The DTC
- Range switch illegal positions met for 5 seconds.

Action Taken When The DTC Sets
- Default to D position.
- Inhibit torque management.
- Maximum line pressure.
- The PCM will not illuminate the Malfunction Indicator Lamp (MIL).

Conditions For Clearing The DTC
- The DTC can be cleared from the PCM history by using a scan tool.
- The DTC will be cleared from history when the vehicle has achieved 40 warmup cycles without a failure reported.
- The PCM will cancel the DTC default actions when the fault no longer exists and the ignition is cycled "off' long enough to power down the PCM.

Diagnostic Aids
- Refer to accompanying chart for the normal range signals and the illegal combinations.
- Inspect the wiring for poor electrical connections at the PCM and at the transmission 8-way connector. Look for possible bent, backed out, deformed or damaged terminals. Check for weak terminal tension as well. Also check for a chafed wire that could short to bare metal or other wiring. Inspect for a broken wire inside the insulation.
- When diagnosing for a possible intermittent short or open condition, move the wiring harness while observing test equipment for a change.
- Refer to the "Range Switch Logic Table" or "Functional Test Procedure" for further information.

Test Description





The numbers below refer to the step numbers on the diagnostic chart:
3. This test checks the indicated range signal to the manual valve actually selected.
4. This test checks for correct voltage from the PCM to the transmission 8-way connector.

Range Switch Logic Table





DTC P0705 Transmission range switch (Mode switch) illegal position