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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1496 (Anti-Lock Brake System - Vehicle Dynamic Systems) >> Diagnosis And Testing >> Anti-Lock Control - Hybrid >> Pinpoint Tests >> Pinpoint Test W: DTC C101A:1C, 62, 64 or C101B:1C >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

The vacuum pressure sensor produces 2 signals used by the ABS module to check the integrity of the vacuum lines, hoses and fittings, and to measure the performance of the brake vacuum pump and brake booster. The ABS module provides a 5-volt reference voltage to the vacuum pressure sensor along circuit LCA37 (YE/OG). Vacuum pressure sensor signal A is provided to the ABS module along circuit VCA38 (BN/VT). Vacuum pressure sensor signal B is provided to the ABS module along circuit VCA39 (BU/GN). The ABS module provides a signal return to the vacuum pressure sensor along circuit RCA37 (WH/BU).

DTC DESCRIPTION TABLE

DTC Description Fault Trigger Conditions
  • C101A:1C - Vacuum Pressure Sensor: Circuit Voltage Out of Range
 If vacuum pressure sensor circuit VCA38 (BN/VT) is shorted to ground, shorted to voltage or has high resistance, this DTC will set. A short to ground or a short to voltage on circuit LCA37 (YE/OG), or an open on or short to voltage on circuit RCA37 (WH/BU) could cause both DTCs C101A:1C and C101B:1C to set.
  • C101A:62 - Vacuum Pressure Sensor: Signal Compare Failure
 If the 2 vacuum pressure signals produced by the vacuum pressure sensor do not match, this DTC will set. If vacuum sensor circuit LCA37 has high resistance (open circuit), this DTC will set. This DTC can set as a result of DTCs C101A:1C, 64 and C101B:1C.
  • C101A:64 - Vacuum Pressure Sensor: Signal Plausibility Failure
 If the vacuum pressure sensor signal A, circuit VCA38 (BN/VT) is shorted to vacuum pressure sensor signal B, circuit VCA39 (BU/GN), this DTC will set.
  • C101B:1C - Vacuum Pressure Sensor Circuit B: Circuit Voltage Out of Range
 If vacuum pressure sensor circuit VCA39 (BU/GN) is shorted to ground, shorted to voltage or has high resistance, this DTC will set. A short to ground or a short to voltage on circuit LCA37 (YE/OG), or an open on or short to voltage on circuit RCA37 (WH/BU) could cause both DTCs C101A:1C and C101B:1C to set.

This pinpoint test is intended to diagnose the following: 

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