P0705

DTC P0705 Transmission Range Switch (Mode Switch) Illegal Position

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 contacts. 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 E-53 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 15A fuse (TURN, BACK UP). 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.
^ Turn Force Motor OFF.
^ 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 warm-up 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.

Test Description
The numbers refer to the step numbers on the diagnostic chart:
3. This test checks the indicated range signal to the manual valve actually selected.
6. This test checks for continuity between each selected range switch connector terminals.





Range Switch Logic Table





DTC P0705 Transmission Range Switch (Mode Switch) Illegal Position