Pinpoint Test A : DTC P185A:00: Notes
WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Two Wheel Drive/Four Wheel Drive Systems for schematic and connector information.
Normal Operation
When the ELDMSS is engaged to lock the rear differential, the ELDMSS opens allowing the voltage being monitored by the TCCM to go high. When the TCCM senses the voltage is high it activates the ELD. The TCCM sends a message to the IPC via the HS-CAN requesting the IPC illuminate the ELD message center indicator.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P185A:00 | Differential Lock-Up Input Switch Circuit High: No Sub Type Information | If the ELD is functioning normally, the differential immediately locks when the ELDMSS is activated and the ELD operating conditions are qualified. This DTC only displays during the self-test function. |
Possible Sources
- Wiring, terminals or connectors
- TCCM
- MSS
NOTE:
Make sure the battery is fully charged before carrying out this pinpoint test.