Pinpoint Test W, Regular Cab - DTC: B1418:11 and B1418:93

WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Supplemental Restrain System for schematic and connector information.

Normal Operation and Fault Conditions

The RCM monitors the passenger door side impact sensor circuits for the following faults:

Open circuit
Short to voltage
Short to ground
Faulted passenger door side impact sensor

If a fault is detected, the RCM stores DTC B1418:11 or B1418:93 in memory and sends a message to the IPC to illuminate the airbag warning indicator.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
B1418:11	Passenger Side Restraints Sensor 1: Circuit Short to Ground	A fault is indicated when the RCM senses a short to ground on the passenger door side impact sensor feed circuit.
B1418:93	Passenger Side Restraints Sensor 1: No Operation	A fault is indicated when the RCM senses a faulted passenger door side impact sensor, a short to voltage on the sensor feed circuit or an open feed or return circuit.

Possible Causes

Wiring, terminals or connectors
Passenger door side impact sensor
RCM

Visual Inspection and Diagnostic Pre-checks

Inspect for damaged wiring harness(es).
Inspect for loose or damaged connectors.

PINPOINT TEST A : B1418:11 AND B1418:93

WARNING: Incorrect repair techniques or actions can cause an accidental Supplemental Restraint System (SRS) deployment. Never compromise or depart from these instructions. Failure to precisely follow all instructions could result in serious personal injury from an accidental deployment.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
NOTE: Only disconnect or reconnect SRS components when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS.
NOTE: Always make sure the correct SRS component is being installed. Parts released for other vehicles may not be compatible even if they appear physically similar. Check the part number listed in the Ford parts catalog to make sure the correct component is being installed. If an incorrect SRS component is installed, Diagnostic Trouble Codes (DTCs) may set.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
NOTE: Do not probe any impact sensor. The impact sensor cannot be tested using a multi-meter

A1 RETRIEVE RCM (RESTRAINTS CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

WARNING: Before beginning any service procedure, refer to Safety Warnings in General Information. Failure to follow this instruction may result in serious personal injury.

REFER to: Pyrotechnic Device Health and Safety Precautions .

Ignition ON.

Using a diagnostic scan tool, perform RCM self-test.

Was DTC B1418:11 or B1418:93 retrieved on-demand during self-test?

Yes

This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-demand during self-test. If DTC U3003:16 or U3003:17 is retrieved on-demand, DIAGNOSE those Diagnostic Trouble Codes (DTCs) first. Refer to: Pinpoint Test - DTC: AG . If DTC U3003:16 or U3003:17 is not retrieved on-demand during self-test, DIAGNOSE the impact sensor Diagnostic Trouble Codes (DTCs). For DTC B1418:11, GO to A2. For DTC B1418:93, GO to A4

If DTC U3003:16 or U3003:17 is retrieved on-demand, DIAGNOSE those Diagnostic Trouble Codes (DTCs) first. Refer to: Pinpoint Test - DTC: AG . If DTC U3003:16 or U3003:17 is not retrieved on-demand during self-test, DIAGNOSE the impact sensor Continuous Memory Diagnostic Trouble Codes (CMDTCs). This is an intermittent fault when present as a CMDTC only. GO to A9

A2 CHECK THE PASSENGER SIDE RESTRAINTS SENSOR 1 DTC (DIAGNOSTIC TROUBLE CODE) FOR A FAULT STATUS CHANGE (SHORT TO GROUND INDICATED)

NOTE: This pinpoint test step attempts to change the fault reported by the RCM by inducing a different fault condition. If the reported fault changes, this indicates the RCM is functioning correctly and is not the source of the fault.
- Ignition OFF.
- Depower the SRS. Refer to: Supplemental Restraint System (SRS) Depowering .
- Disconnect Passenger Front Door Side Impact Sensor C644 .
- Repower the SRS.
  Do not prove out the SRS at this time. Refer to: Supplemental Restraint System (SRS) Repowering .
- Ignition ON.
- Using a diagnostic scan tool, perform RCM self-test.
Did the on-demand DTC change from B1418:11 to B1418:93?

Yes INSTALL a new passenger door side impact sensor. Refer to: Front Door Side Impact Sensor . Go to A10

No GO to A3

A3 CHECK THE PASSENGER DOOR SIDE IMPACT SENSOR FEED CIRCUITS FOR A SHORT TO GROUND OR A SHORT TOGETHER

Ignition OFF.

Depower the SRS. Refer to: Supplemental Restraint System (SRS) Depowering .

Disconnect RCM C310A and C310B .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C644-1	Courtesy of FORD MOTOR COMPANY	Ground

Measure:

Positive Lead	Measurement / Action	Negative Lead
C644-1	Courtesy of FORD MOTOR COMPANY	C644-2

Are the resistances greater than 10, 000 ohms?

Yes

GO to A8

No	REPAIR the affected circuit(s). Refer to Connector Repair Procedures for schematic and connector information. Go to A10

A4 CHECK THE PASSENGER DOOR SIDE IMPACT SENSOR AND RCM (RESTRAINTS CONTROL MODULE) CONNECTIONS (NO OPERATION INDICATED)
- Ignition OFF.
- Depower the SRS. Refer to: Supplemental Restraint System (SRS) Depowering .
- Inspect the Passenger Front Door Side Impact Sensor electrical connector C644 to make sure it is fully seated and locked. Seat and lock the connector as necessary.
- Gain access to the RCM and inspect C310A and C310B to make sure they are fully seated and locked. Seat and lock the connector as necessary
- Repower the SRS.
  Do not prove out the SRS at this time. Refer to: Supplemental Restraint System (SRS) Repowering .
- Ignition ON.
- Using a diagnostic scan tool, perform RCM self-test.
Was DTC B1418:93 retrieved on-demand during self-test?

Yes GO to A5

No The fault has been corrected. GO to A10

A5 CHECK THE PASSENGER DOOR SIDE IMPACT SENSOR FEED CIRCUIT FOR A SHORT TO VOLTAGE (NO OPERATION INDICATED)

Ignition OFF.

Depower the SRS. Refer to: Supplemental Restraint System (SRS) Depowering .

Disconnect Passenger Front Door Side Impact Sensor C644 .

Disconnect RCM C310A and C310B .

Repower the SRS.
Do not prove out the SRS at this time. Refer to: Supplemental Restraint System (SRS) Repowering .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C644-1	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit. Refer to Connector Repair Procedures for schematic and connector information. Go to A10

GO to A6

A6 CHECK THE PASSENGER DOOR SIDE IMPACT SENSOR CIRCUITS FOR AN OPEN

Ignition OFF.

Depower the SRS. Refer to: Supplemental Restraint System (SRS) Depowering .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C310B-45	Courtesy of FORD MOTOR COMPANY	C644-1
C310B-46	Courtesy of FORD MOTOR COMPANY	C644-2

Are the resistances less than 0.5 ohm?

Yes

GO to A7

No	REPAIR the affected circuit(s). Refer to Connector Repair Procedures for schematic and connector information. Go to A10

A7 CHECK THE PASSENGER SIDE RESTRAINTS SENSOR 1 DTC (DIAGNOSTIC TROUBLE CODE) FOR A FAULT STATUS CHANGE (NO OPERATION INDICATED)

NOTE: This pinpoint test step attempts to change the fault reported by the RCM by inducing a different fault condition. If the reported fault changes, this indicates the RCM is functioning correctly and is not the source of the fault.

Connect RCM C310A and C310B .

Connect a fused jumper wire as shown:

Lead 1	Measurement / Action	Lead 2
C644-1	Courtesy of FORD MOTOR COMPANY	C644-2

Repower the SRS.
Do not prove out the SRS at this time. Refer to: Supplemental Restraint System (SRS) Repowering .

Ignition ON.

Using a diagnostic scan tool, perform RCM self-test.

Did the on-demand DTC change from B1418:93 to B1418:11?

Yes	REMOVE the fused jumper wire and INSTALL a new passenger door side impact sensor. Refer to: Front Door Side Impact Sensor . Go to A10

No	REMOVE the fused jumper wire and GO to A8

A8 CONFIRM THE RCM (RESTRAINTS CONTROL MODULE) FAULT

NOTE: Make sure all SRS components and the RCM electrical connectors are connected before carrying out the self-test. If not, Diagnostic Trouble Codes (DTCs) are recorded.

Ignition OFF.

Depower the SRS. Refer to: Supplemental Restraint System (SRS) Depowering .

Prior to reconnecting any previously disconnected SRS component:
- inspect connector(s) (including any inline connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
- inspect wire harness for any damaged, pinched, cut or pierced wires.
- inspect RCM C310A and C310B Connector Position Assurance (CPA) lever/lock for correct operation.
- repair any concerns found. Refer to Connector Repair Procedures for schematic and connector information.

Connect Passenger Door Side Impact Sensor C644 .

Connect RCM C310A and C310B .

Repower the SRS.
Do not prove out the SRS at this time. Refer to: Supplemental Restraint System (SRS) Repowering .

Ignition ON.

Using a diagnostic scan tool, perform RCM self-test.

Was the original DTC retrieved on-demand during self-test?

Yes	CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RCM. Refer to: Restraints Control Module (RCM) . Go to A10

No	In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test. GO to A9

A9 CHECK FOR AN INTERMITTENT FAULT

Ignition OFF.

Depower the SRS. Refer to: Supplemental Restraint System (SRS) Depowering .

Disconnect Passenger Door Side Impact Sensor C644 .

Disconnect RCM C310A and C310B .

Inspect:
- harness and component connectors for loose or spread terminals and loose or frayed wire connections at terminals.
- wire harness for any damage, pinched, cut or pierced wires.
- RCM C310A and C310B Connector Position Assurance (CPA) lever/lock for correct operation.
- repair any concerns found. Refer to Connector Repair Procedures for schematic and connector information.

Connect Passenger Door Side Impact Sensor C644 .

Connect RCM C310A and C310B .

Repower the SRS.
Do not prove out the SRS at this time. Refer to: Supplemental Restraint System (SRS) Repowering .

Ignition ON.

Using a diagnostic scan tool, perform RCM self-test.

Was DTC B1418:11 or B1418:93 retrieved on-demand during the self-test?

Yes	This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-demand during self-test. For DTC B1418:11, GO to A2. For DTC B1418:93, GO to A4

No	The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test. GO to A10

A10 CHECK FOR ADDITIONAL SRS (SUPPLEMENTAL RESTRAINT SYSTEM) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition OFF.

Reconnect all SRS components (if previously disconnected).

If previously directed to depower the SRS, repower the SRS. Do not prove out the SRS at this time. Refer to: Supplemental Restraint System (SRS) Repowering .

Ignition ON.

NOTE: When selecting Restraints from the Self Test menu, DTCs are retrieved from the RCM and BECMB.

Using a diagnostic scan tool, perform RCM self-test.

Are any RCM and/or BECMB Diagnostic Trouble Codes (DTCs) retrieved on-demand during self-test?

Yes	Do not clear any Diagnostic Trouble Codes (DTCs) until all Diagnostic Trouble Codes (DTCs) have been resolved. DIAGNOSE and REPAIR the Diagnostic Trouble Codes (DTCs). Refer to: Airbag Supplemental Restraint System (SRS) .

No	The repair is complete. RETURN the vehicle to the customer.