PINPOINT TEST P: DTCs C1280, C1282, C1516, C1963, C1975, C2770, U0151 and U0452

WARNING: This page is about a different car, the 2014 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Do not handle, move or change the original horizontal mounting position of the restraints control module (RCM) while the RCM is connected and the ignition switch is ON. Failure to follow this instruction may result in the accidental deployment of the Safety Canopy and cause serious personal injury or death.

WARNING: Never probe the electrical connectors on airbag, Safety Canopy or side air curtain assemblies. Failure to follow this instruction may result in the accidental deployment of these assemblies, 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: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.

NOTE: Supplemental Restraint System (SRS) components should only be disconnected or reconnected when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS .

NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

P1 CHECK FOR A HS-CAN COMMUNICATION CONCERN WITH THE RCM OR PSCM
- Connect the scan tool.
- Ignition ON.
- NOTE: The Network Test does not test the dedicated CAN communications between the ABS module and RCM .
  
  Using a scan tool, carry out a Network Test.
Does the RCM and PSCM pass the Network Test?
- Yes : GO to P2 .
- No : REFER to MODULE COMMUNICATIONS NETWORK to diagnose the High Speed Controller Area Network (HS-CAN) bus.
P2 CHECK FOR RCM AND PSCM DTCs
- Enter the following diagnostic mode on the scan tool: Self Test - RCM .
- Enter the following diagnostic mode on the scan tool: Self Test - PSCM .
Are any RCM or PSCM DTCs retrieved on-demand self-test?
- Yes : For RCM DTCs, REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
  For PSCM DTCs, REFER to STEERING SYSTEM - ELECTRONIC POWER ASSIST STEERING (EPAS) .
- No : If only one of the following ABS module DTCs C1280, C1282, C1516, C2770 was retrieved, GO to P3 .
  If more than one ABS module DTC C1280, C1282, C1516, C2770 was retrieved, GO to P7.
  
  For DTCs U0151 and U0452, GO to P7.
  
  For all other DTCs, GO to P3 .
P3 CHECK THE ABS MODULE YAW RATE (YAW_RATE_2) PID
- Enter the following diagnostic mod e on the scan tool: Data Logger - ABS Module.
- NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.
  
  Monitor the YAW_RATE_2 PID.
Is the YAW_RATE_2 PID value between -3.5 and 3.5?
- Yes : GO to P4 .
- No : GO to P12.
P4 CHECK THE ABS MODULE LATERAL ACCELERATION (LAT_ACCL_2) PID
- NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.
  
  Monitor the LAT_ACCL_2 PID.
Is the LAT_ACCL_2 PID value between -0.125g and 0.125g?
- Yes : GO to P5 .
- No : GO to P12.
P5 CHECK THE ABS MODULE LONGITUDINAL ACCELERATION (LONG_ACCL) PID
- NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.
  
  Monitor the LONG_ACCL PID.
Is the LONG_ACCL PID value between -0.15g and 0.15g?
- Yes : GO to P6 .
- No : GO to P12.
P6 CHECK THE ABS MODULE ROLL RATE (ROLLRAT) PID
NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.
- Monitor the ROLLRAT PID.
Is the ROLLRAT PID value between -3.5 and 3.5?
- Yes : GO to P7 .
- No : GO to P12.

P7 CHECK THE DEDICATED CAN CIRCUITS FOR AN OPEN

Ignition OFF.
Depower the SRS . Refer to Supplemental Restraint System (SRS) Depowering and Repowering in SUPPLEMENTAL RESTRAINT SYSTEM .
Disconnect: ABS Module C135 .
Disconnect: RCM C310A and C310B .

Measure the resistance between the ABS module C135 , harness side and the RCM C310B , harness side as indicated in the following chart:

ABS Module	Circuit	RCM
C135-37	VCA23 (BU/WH)	C310B-20
C135-24	VCA24 (GN/OG)	C310B-19

Fig 1: Measuring Resistance Between ABS Module C135 And C310B Harness Side

Courtesy of FORD MOTOR CO.

Are the resistances less than 5 ohms?

Yes : GO to P8 .
No : REPAIR the affected circuit(s). REPOWER the SRS . REFER to Supplemental Restraint System (SRS) Depowering and Repowering in SUPPLEMENTAL RESTRAINT SYSTEM . CLEAR all CMDTCs . PERFORM a road test. REPEAT the self-test.

P8 CHECK THE DEDICATED CAN CIRCUITS FOR A SHORT TO GROUND
- Measure the resistance between ground and:
  - ABS module C135-24 , circuit VCA24 (GN/OG), harness side.
  - ABS module C135-37 , circuit VCA23 (BU/WH), harness side.
    
    Fig 2: Measuring Resistance Between Ground And ABS Module C135-24, Circuit VCA24 (GN/OG), Harness Side
    Courtesy of FORD MOTOR CO.
Is the resistance greater than 10, 000 ohms?
- Yes : GO to P9 .
- No : REPAIR the affected circuit(s). REPOWER the SRS . REFER to Supplemental Restraint System (SRS) Depowering and Repowering in SUPPLEMENTAL RESTRAINT SYSTEM . CLEAR all CMDTCs . PERFORM a road test. REPEAT the self test.
P9 CHECK THE DEDICATED CAN CIRCUITS FOR A SHORT TOGETHER
- Measure the resistance between ABS module C135-24 , circuit VCA24 (GN/OG), harness side and ABS module C135-37 , circuit VCA23 (BU/WH), harness side.
  
  Fig 3: Measuring Resistance Between ABS Module C135-24, Circuit VCA24 (GN/OG) And ABS Module C135-37, Circuit VCA23 (BU/WH)
  Courtesy of FORD MOTOR CO.
Is the resistance greater than 10, 000 ohms?
- Yes : GO to P10 .
- No : REPAIR the affected circuit(s). REPOWER the SRS . REFER to Supplemental Restraint System (SRS) Depowering and Repowering in SUPPLEMENTAL RESTRAINT SYSTEM . CLEAR all CMDTCs . PERFORM a road test. REPEAT the self test.
P10 CHECK THE DEDICATED CAN CIRCUITS FOR A SHORT TO VOLTAGE
- Repower the SRS . Do not prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in SUPPLEMENTAL RESTRAINT SYSTEM .
- Ignition ON.
- Measure the voltage between ground and:
  - ABS module C135-24 , circuit VCA24 (GN/OG), harness side.
  - ABS module C135-37 , circuit VCA23 (BU/WH), harness side.
    
    Fig 4: Measuring Voltage Between Ground And ABS Module C135-24, Circuit VCA24 (GN/OG), Harness Side
    Courtesy of FORD MOTOR CO.
Is any voltage present?
- Yes : REPAIR the affected circuit(s). CLEAR all CMDTCs . PERFORM a road test. REPEAT the self test.
- No : GO to P11 .
P11 CHECK RCM TERMINATING RESISTOR
- Ignition OFF.
- Depower the SRS . Refer to Supplemental Restraint System (SRS) Depowering and Repowering in SUPPLEMENTAL RESTRAINT SYSTEM .
- Prior to reconnecting any previously disconnected SRS component:
  - inspect connector(s) (including any in-line connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
  - inspect wire harness for any damage, pinched, cut or pierced wires.
  - inspect RCM C310A and C310B Connector Position Assurance (CPA) lever/lock for correct operation. Refer to RCM in SUPPLEMENTAL RESTRAINT SYSTEM .
  - repair any concerns found.
    Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.
- Connect: RCM C310A and C310B .
- Measure the resistance between ABS module C135-37 , circuit VCA23 (BU/WH), harness side and C135-24 , circuit VCA24 (GN/OG), harness side.
  
  Fig 5: Measuring Resistance Between ABS Module C135-37, Circuit VCA23 (BU/WH) And C135-24 Circuit VCA24 (GN/OG)
  Courtesy of FORD MOTOR CO.
Is the resistance between 108 and 132 ohms?
- Yes : GO to P12 .
- No : INSTALL a new RCM . REFER to SUPPLEMENTAL RESTRAINT SYSTEM . CLEAR all CMDTCs . PERFORM a road test. REPEAT the self test. If the concern is still present, GO to P14. If other DTCs are present, REFER to the appropriate DTC CHART .
P12 CHECK THE RCM INSTALLATION AND MOUNTING SURFACE
- Ignition OFF.
- If not previously directed to do so, depower the Supplemental Restraint System (SRS). Refer to Supplemental Restraint System (SRS) Depowering and Repowering in SUPPLEMENTAL RESTRAINT SYSTEM .
- Inspect the Restraints Control Module (RCM) installation and make sure that the fasteners are fully seated and tightened correctly. Refer to RCM in SUPPLEMENTAL RESTRAINT SYSTEM .
- Inspect the mounting surface for damage, corrosion or foreign material.
Is the RCM installed correctly and is the mounting surface clean and free from damage?
- Yes : GO to P13 .
- No : REPAIR or INSTALL new as necessary. REPOWER the SRS . REFER to Supplemental Restraint System (SRS) Depowering and Repowering in SUPPLEMENTAL RESTRAINT SYSTEM . CLEAR all CMDTCs. PERFORM a road test. REPEAT the self test.
P13 CHECK FOR AN INTERMITTENT FAULT
- Disconnect: RCM C310A and C310B .
- Disconnect: ABS module C135 .
  - inspect connector(s) (including any in-line connectors) for corrosion, loose or spread terminals and loose or frayed wire connections at terminals.
  - inspect wire harness for any damage, pinched, cut or pierced wires.
  - repair any concerns found.
    Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.
- Connect: All Previously Disconnected Component(s)/Connector(s).
- Repower the SRS . Do not prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in SUPPLEMENTAL RESTRAINT SYSTEM .
- Perform a road test.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test - ABS Module.
Is the concern still present?
- Yes : INSTALL a new RCM . REFER to SUPPLEMENTAL RESTRAINT SYSTEM . CLEAR all CMDTCs . PERFORM a road test. REPEAT the self test. If the concern is still present, GO to P14 . If other DTCs are present, REFER to the appropriate DTC CHART .
- No : The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time . SRS components should only be installed when directed to do so in the pinpoint test .
P14 CHECK THE ABS MODULE FOR CORRECT OPERATION
- Depower the SRS . Refer to Supplemental Restraint System (SRS) Depowering and Repowering in SUPPLEMENTAL RESTRAINT SYSTEM .
- Prior to reconnecting any previously disconnected SRS component:
  - inspect connector(s) (including any in-line connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
  - inspect wire harness for any damage, pinched, cut or pierced wires.
  - inspect RCM C310A and C310B CPA lever/lock for correct operation. Refer to RCM in SUPPLEMENTAL RESTRAINT SYSTEM .
  - inspect ABS module C135 for dirt, corrosion, water intrusion, pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
  - repair any concerns found.
    Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.
- Connect: All Previously Disconnected Component(s)/Connector(s).
- Repower the SRS . Do not prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in SUPPLEMENTAL RESTRAINT SYSTEM .
- Perform a road test.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test - ABS Module.
Is the concern still present?
- Yes : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE .
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.