Circuit Description

Park/neutral position switch is on whenever shift lever is in "N" or "P" position. With switch on, ECM terminal NSW is grounded via starter relay (zero voltage at terminal NSW). With shift lever in "D", "2", "L" or "R" position, switch is off (battery voltage at terminal NSW). DTC is set under the following conditions:

• Two or more switches are on simultaneously for "N", "2" or "L" position.
• If park/neutral position switch is on while driving vehicle for 30 seconds or more at 25 MPH or more.
• If park/neutral position switch is on while driving vehicle for 30 seconds or more with engine speed at 1500-2500 RPM.

Possible causes are:

• Short in park/neutral position switch circuit.
• Park/neutral position switch.
• ECM.