Is the resistance between 1 and 3 ohms?
Yes | GO to T4 |
|---|---|
No | INSTALL a new keyless entry rear antenna. REFER to: Keyless Entry Rear Antenna (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation). |
T4 CHECK THE KEYLESS ENTRY REAR ANTENNA CIRCUITS FOR A SHORT TO VOLTAGE
Disconnect BCM C2280D. Ignition ON. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C4378-1 | Ground | |
C4378-2 | Ground |
Is any voltage present?
Yes | REPAIR the circuit in question. |
|---|---|
No | GO to T5 |
T5 CHECK THE KEYLESS ENTRY REAR ANTENNA CIRCUITS FOR A SHORT TO GROUND
Ignition OFF. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C4378-1 | Ground | |
C4378-2 | Ground |
Are the resistances greater than 10,000 ohms?
Yes | GO to T6 |
|---|---|
No | REPAIR the circuit in question. |
T6 CHECK THE KEYLESS ENTRY REAR ANTENNA CIRCUITS FOR AN OPEN
Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C4378-1 | C2280E-16 | |
C4378-2 | C2280E-15 |
Are the resistances less than 3 ohms?
Yes | GO to T7 |
|---|---|
No | REPAIR the circuit in question. |
T7 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
Disconnect and inspect all the BCM connectors. Repair:
corrosion (install new connectors or terminals - clean module pins) damaged or bent pins - install new terminals pins pushed-out pins - install new pins as necessary
Reconnect the BCM connectors and make sure they seat and latch correctly. Operate the system and determine if the concern is still present.
Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.