Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C251-6 | Ground | |
C251-14 | Ground |
Disconnect modules one at a time until the resistance to ground is greater than 1,000 ohms.
APIM (if equipped) C2383 or C2342 (touchscreen display) BCM C2280G ICM C2114 (if equipped) PCM C1551B (2.3L), C1381B (3.7L) or C175B (5.0L, 5.2L)
Did the resistance change to greater than 1,000 ohms with one of the modules disconnected?
Yes | For the APIM, GO to AD21 For the BCM, GO to AD20 For the ICM, GO to AD22 For the PCM, GO to AD19 |
|---|---|
No | REPAIR the circuit in question. CONNECT all modules. |
AD12 CHECK FOR RESTORED COMMUNICATION WITH THE PCM (POWERTRAIN CONTROL MODULE) DISABLED
NOTE: Establish an IDS session prior to disabling the PCM in this test step. If the PCM has failed communication during multiple attempts to identify the vehicle, first identify the vehicle manually by entering a PCM part number, calibration number or tear tag when prompted by IDS. When a vehicle is manually identified by a PCM part number, calibration number or tear tag, the IDS does not automatically run a network test. Manually select and run the network test. When re-running the network test, close the network test application first or the screen display reverts back to the prior network test results.
Disconnect: BJB fuse 83 (20A). Using a diagnostic scan tool, perform the network test.
Do all other modules pass the network test?
Yes | INSTALL the removed fuses. GO to Pinpoint Test A |
|---|---|
No | INSTALL the removed fuses. GO to AD13 |
AD13 CHECK FOR RESTORED COMMUNICATION WITH THE GWM (GATEWAY MODULE A) DISABLED
NOTE: When re-running the network test, close the network test application first or the screen display reverts back to the prior network test results.
Disconnect: BCM fuse 13 (7.5A) and fuse 15 (10A). Using a diagnostic scan tool, perform the network test.
Do all other modules pass the network test?
Yes | INSTALL the removed fuses. GO to Pinpoint Test AC |
|---|---|
No | INSTALL the removed fuses. GO to AD14 |
AD14 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE BCM (BODY CONTROL MODULE) DISABLED
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.