PINPOINT TEST AA : THE MOVEABLE ROOF CONTROL MODULE A (MRCMA) DOES NOT RESPOND
TO THE DIAGNOSTIC SCAN TOOL
AA1 CHECK THE MOVEABLE ROOF CONTROL MODULE A (MRCMA) VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
Ignition OFF. Disconnect: Moveable Roof Control Module A (MRCMA) C4830. Ignition ON. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C4830-6 | Ground |
Is the voltage greater than 11 volts?
Yes | GO to AA2 |
|---|---|
No | VERIFY BJB fuse 17 (20A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short. |
AA2 CHECK THE MOVEABLE ROOF CONTROL MODULE A (MRCMA) GROUND CIRCUIT FOR AN OPEN
Ignition OFF. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C4830-5 | Ground |
Is the resistance less than 3 ohms?
Yes | GO to AA3 |
|---|---|
No | REPAIR the circuit. |
AA3 CHECK THE MS-CAN (MEDIUM SPEED-CONTROLLER AREA NETWORK) CIRCUITS BETWEEN THE MOVEABLE ROOF CONTROL MODULE A (MRCMA) AND THE GWM (GATEWAY MODULE A) FOR AN OPEN
Disconnect: GWM C2431. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C4830-9 | C2431-23 | |
C4830-10 | C2431-22 |
Are the resistances less than 3 ohms?
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.