Pinpoint Test D : The Restraints Control Module (RCM) Does Not Respond To The Diagnostic Scan Tool

WARNING: This page is about a different car, the 2020 Ford Transit Connect. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Module Communications Network for schematic and connector information. Refer to Supplemental Restraint System for schematic and connector information.
Normal Operation and Fault Conditions

The RCM communicates on the HS-CAN2. REFER to: Communications Network - System Operation and Component Description .

Possible Sources
- Fuse
- Wiring, terminals and connectors
- RCM
Visual Inspection and Pre-checks
- Verify BCM fuse 10 (10A) and fuse 15 (10A) are OK.
WARNING: Never probe the electrical connectors on air bag, Safety Canopy® or side air curtain modules. Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
WARNING: Never disassemble or tamper with seat belt deployable components, including pretensioners, load limiters and inflators. Never back probe deployable device electrical connectors. Tampering or back probing may cause an accidental deployment and result in personal injury or death.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings.
NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.

D1 CHECK THE RCM (RESTRAINTS CONTROL MODULE) CONNECTION
- Ignition OFF.
- Depower the SRS.
- Disconnect: RCM C310A and C310B.
Are RCM C310A pin 19 and C310B pins 47 and 48 OK?

Yes GO to D2

No INSTALL a new wiring harness. REPOWER the SRS.

D2 CHECK FOR BECMB (BATTERY ENERGY CONTROL MODULE B) NETWORK COMMUNICATION
- Ignition ON.
- Using a diagnostic scan tool, perform the network test. Repower the SRS.
Does the BECMB pass the network test?

Yes GO to D3

No DIAGNOSE a module communication concern. GO to Pinpoint Test B

D3 RETRIEVE RECORDED BECMB (BATTERY ENERGY CONTROL MODULE B) DIAGNOSTIC TROUBLE CODES (DTCS)
- Using a diagnostic scan tool, perform a BECMB self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?

Yes DIAGNOSE the Diagnostic Trouble Codes (DTCs). REFER to Anti-Lock Brake System (ABS) And Stability Control .

No GO to D4

D4 CHECK THE RCM (RESTRAINTS CONTROL MODULE) VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Repower the SRS.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C310A-19	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to D5

No	VERIFY the BCM fuses 10 (10A) and 15 (10A) are OK. If OK, REPAIR the circuit. If not OK, REFER to OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.

D5 CHECK THE RCM (RESTRAINTS CONTROL MODULE) CASE GROUND
- Ignition OFF.
- Measure the resistance between the RCM case and a good chassis ground.
Is the resistance less than 3 ohms?

Yes GO to D6

No REPAIR the RCM case ground as necessary.

D6 CHECK THE HS-CAN2 (HIGH-SPEED CONTROLLER AREA NETWORK 2) CIRCUITS BETWEEN THE RCM (RESTRAINTS CONTROL MODULE) AND THE GWM (GATEWAY MODULE A) FOR AN OPEN

Depower the SRS.

Disconnect GWM C2431.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C310B-48	Courtesy of FORD MOTOR COMPANY	C2431-18
C310B-47	Courtesy of FORD MOTOR COMPANY	C2431-17

Are the resistances less than 3 ohms?

Yes	CONNECT the GWM, GO to D7

No	REPAIR the circuit in question.

D7 CHECK FOR CORRECT RCM (RESTRAINTS CONTROL MODULE) OPERATION

Ignition OFF.

Depower the SRS.

Disconnect and inspect all the RCM connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the RCM connectors. Make sure they seat and latch correctly.

Repower the SRS.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new RCM. REFER to Supplemental Restraint System .

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.