Pinpoint Test E: Park Neutral Signal
WARNING: This page is about a different car, the 2006 Mercury Montego and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
- E1 CHECK FOR VOLTAGE ON CIRCUIT 199
- Disconnect: Transmission Control Module (TCM) Connector C168.
- Key in ON position.
- Range selector lever in PARK or NEUTRAL.
- E1 CHECK FOR VOLTAGE ON CIRCUIT 199 (Continued)
- Measure the voltage on C168-5 and chassis ground.
- Is the voltage between 0-0.8 volt?
Yes: GO to E2.
No: GO to E3.
- E2 CHECK FOR VOLTAGE ON CIRCUIT 199
- Disconnect: TCM Connector C168.
- Key in ON position.
- Range selector lever in REVERSE, DRIVE or LOW.
- Measure the voltage on C168-5 and chassis ground.
- Is the voltage greater than 10 volts?
Yes: INSTALL a new TCM. After installing the new TCM, VERIFY that the starting system is operating correctly. If not, GO to ENGINE COOLING to check starting system.
No: GO to E3.
- E3 CHECK VEHICLE HARNESS CIRCUIT 199 FOR A SHORT
- Disconnect: PCM Connector C175T.
- Disconnect: Transmission Module C168.
- Measure the resistance between C168-5 and C175T-19.
- Is the resistance greater than 10,000 ohms?
Yes: GO to E4.
No: REPAIR short in circuit 199.
- E4 CHECK VEHICLE HARNESS CIRCUIT 199 FOR AN OPEN
- Disconnect: PCM Connector C175T.
- E4 CHECK VEHICLE HARNESS CIRCUIT 199 FOR AN OPEN (Continued)
- Disconnect: Transmission Module C168.
- Measure the resistance between C168-5 and chassis ground.
- Is the resistance greater than 10,000 ohms?
Yes: REPAIR the open in circuit 199.
No: INSTALL a new TCM. After installing the new TCM, VERIFY that the starting system is operating correctly. If not, GO to ENGINE COOLING to check starting system.