P0705

Code P0705, Transaxle Range Switch Circuit:

Trans Range Switch Circuit:

CIRCUIT DESCRIPTION
The transmission range switch is part of the Transmission Neutral Start Switch (TMNSS) mounted on the transaxle assembly. It is a multi-signal switch sending information relative to gear selector position to the PCM. The PRNDL input consists of 4 discrete circuits to pull 4 PCM voltages low in various combinations to indicate each gear range. The voltage level of each of the circuits is represented as low grounded circuit, high = open circuit. The 4 states displayed represent decoder Parity, A, B, and C inputs respectively.


DTC P07O5 WILL SET WHEN:
^ Ignition is "ON" and engine is "OFF."
^ Vehicle speed is 0 mph.
^ PRNDL inputs indicate a gear other than park or neutral.
^ All conditions met for .13 second for 3 consecutive start-ups.

OR

^ The PRNDL input status indicators (P,A,B,C) indicate an incorrect combination of low and high for more than 10 seconds.

ACTION TAKEN (PCM will default to):
A current DTC P0705 will cause the PCM to command a "D4" shift pattern. DTC P0705 does not illuminate the MIL (Service Engine Soon).

TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. & 2. These steps check for proper operation of the transmission range switch.
3. This test checks for an open or grounded circuit.

NOTE: When DTC P0705 is present, the PCM assumes the D4 position until a correct combination is received by the PCM. Therefore, some gear select positions may not be possible until the fault is repaired.

DIAGNOSTIC AIDS
An intermittent may be caused by a poor connection, rubbed through wire insulation or a wire broken inside the insulation.

Check for:
^ Poor connection or damaged harness Inspect PCM harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal to wire connection and damaged harness.
^ Intermittent test - Monitor a Tech 1 while moving related connectors and wiring harness. If the failure is induced, the scan data will change from low to high or high to low. This may help to isolate the location of the malfunction.