TEST ACTION APPLICABILITY
8 Ignition Off.
Inspect the Wiring and Connector relating to Park/Neutral Position Switch.
Were any problems found?TRANSMISSION -
AUTOMATIC
4-SPD, 41TE
and/or TRANSMIS-
SION - AUTO-
STICK
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-5A.
No®Test Complete.
9 Ignition Off.
Disconnect the PCM Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure between the Park/Neutral Switch Sense Circuit at the
PCM Connector and Ground.
While moving Gear Selector between Park and Reverse, watch Ohmmeter display.
Did the display switch from below 5.0 ohms to above 5.0 ohms?TRANSMISSION -
AUTOMATIC
4-SPD, 41TE
and/or TRANSMIS-
SION - AUTO-
STICK
Ye s®Replace the PCM.
Perform Powertrain Verification Test VER-5A.
No®Go To 10
10 Ignition Off.
Disconnect the PCM Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure between the Park/Neutral Switch Sense Circuit at the
PCM Connector and Ground.
While moving gear selector between Park and Reverse, watch Ohmmeter display.
Did the display stay below 5.0 ohms at all times?TRANSMISSION -
AUTOMATIC
4-SPD, 41TE
and/or TRANSMIS-
SION - AUTO-
STICK
Ye s®Repair the P/N Switch Sense Circuit for a short to Ground.
Perform Powertrain Verification Test VER-5A.
No®Go To 11
11 Ignition Off.
Disconnect the PCM.
Disconnect the Transmission Range Sensor (TRS) Connector.
Note: Check connectors - Clean/repair as necessary.
With an Ohmmeter, measure the Park/Neutral Switch Sense Circuit from the PCM
to the TRS.
Is the resistance below 5.0 ohms?TRANSMISSION -
AUTOMATIC
4-SPD, 41TE
and/or TRANSMIS-
SION - AUTO-
STICK
Ye s®Go To 12
No®Repair open Park/Neutral Switch Sense Circuit.
Perform Powertrain Verification Test VER-5A.
12 If there are no potential causes remaining, the Transmission Range Sensor is
assumed to be defective.
View repair options.TRANSMISSION -
AUTOMATIC
4-SPD, 41TE
and/or TRANSMIS-
SION - AUTO-
STICK
Repair
Replace the TRS.
Perform Powertrain Verification Test VER-5A.
309
TRANSMISSION
P-1899 PARK/NEUTRAL SWITCH STUCK IN PARK OR IN GEAR Ð
Continued
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