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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 565 (Anti-Lock Brake System (Abs) And Stability Control) >> Diagnosis And Testing >> Anti-Lock Brake System (ABS) and Stability Control >> Pinpoint Tests >> Pinpoint Test P: DTCs C1280, C1282, C1516, C1963, C1975, C2770, U0151 and U0452 >> Normal Operation

Normal Operation

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.

The ABS module uses information received from several sensors (wheel speed sensors, steering wheel rotation sensor, stability/traction control system sensors, etc.) to determine if vehicle stability, traction or roll warrants ESC  or RSC®  interaction. If an event is going to occur, the ABS module adjusts the brake torque at specific wheels and the PCM reduces engine torque to make the vehicle more stable. Once the ABS module has determined that the stability event has been corrected, it returns the brake and engine torque to normal and continues to monitor the vehicle. DTCs set in the ignition cycle can only be cleared by cycling the ignition off and on once the fault has been corrected. The Restraints Control Module (RCM) measures the yaw rate and vehicle acceleration, then sends the signal through a secondary, dedicated Controller Area Network (CAN) to the ABS module. The ABS module uses this information for Advance Trac® and RSC®  system operation. The ABS module also compares this information to information it receives from other sensors (brake pedal input, steering wheel) to determine how valid the information is and to determine if an instability event is about to occur.

The RCM  and the ABS module communicate along circuits VCA23 (BU/WH) and VCA24 (GN/OG). An open circuit or a short to power or ground on any one of these circuits causes the ABS module to set a DTC. Also, if the RCM  is not mounted in the correct position, with the electrical connector facing the driver-side of the vehicle, the ABS module also sets DTCs.

DTC DESCRIPTION

DTC Description Fault Trigger Condition
  • C1280 - Yaw Rate Sensor Signal Fault
  • C1282 - Lateral Accelerometer Signal Fault
  • C1516 - Roll Rate Sensor Signal Fault
  • C2770 - Longitudinal Acceleration Sensor Signal Fault
 If the ABS module receives a message from the RCM  that is out of the normal operating range or one that does not agree with other sensor information, the appropriate signal fault DTC sets.
  • C1963 - Stability Control Inhibit Warning
  • C1975 - IVD Plausibility Failure

(1)		 If conditions or DTCs exist that prevent the Advance Trac® and RSC®  systems from operating, DTCs C1963 and/or C1975 sets. This DTC is usually set due to the steering wheel rotation sensor or the RCM  being damaged or installed incorrectly. If DTCs are present from the RCM  or PSCM  , diagnose these DTCs first.
  • U0151 - Lost Communication with Restraints Control Module (RCM)
  • U0452 - Invalid Data Received from RCM 
 The RCM  uses a dedicated communication bus to send information to the ABS module. If, during normal operation, the ABS module does not receive any information from the RCM  for more than 250 milliseconds, DTC U0151 or U0452 sets. U0151 monitors both the HS-CAN  and the dedicated CAN  circuits. If the ABS module does not receive the RCM  serial number, over the HS-CAN  , DTC U0151 sets. It also sets if the sensor data is not received over the dedicated CAN from the RCM  . These DTCs can also be caused by another module software update. CLEAR all module DTCs and carry out another self-test to recheck the system.
(1) Interactive Vehicle Dynamics

This pinpoint test is intended to diagnose the following: 

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