B1231

PINPOINT TEST G307559p11: B1231, C1288, C1440, C1997; PRESSURE SENSOR MAIN/PRIMARY 5 VOLT SUPPLY CIRCUIT FAILURE

G307559t45: CHECK THE PRESSURE SENSOR 5 VOLT SUPPLY
1. Turn the ignition switch to the OFF position.
2. Disconnect the pressure sensor electrical connector EC34.
3. Turn the ignition switch to the ON position.
4. Measure the voltage between EC34, pin 01 (BG) and GROUND.
5. Measure the voltage between EC34, pin 03 (YU) and GROUND.

^ Is either voltage less than 5 volts?

-> Yes GO to Pinpoint Test G307559t46.

-> No GO to Pinpoint Test G307559t6.

G307559t46: CHECK THE PRESSURE SENSOR 5 VOLT SUPPLY CIRCUIT FOR HIGH RESISTANCE
1. Turn the ignition switch to the OFF position.
2. Disconnect the ABS/DSC module electrical connector EC30.
3. Measure the resistance between the EC34, pin 03 (YU) and EC30, pin 18 (GU).

^ Is the resistance greater than 5 ohms?

-> Yes REPAIR the high resistance circuit. For additional information, refer to Vehicle/Diagrams. CLEAR the DTC. TEST the system for normal operation.

-> No GO to Pinpoint Test G307559t48.

G307559t48: CHECK THE PRESSURE SENSOR 5 VOLT SUPPLY CIRCUIT FOR SHORT TO GROUND
1. Measure the resistance between EC34, pin 03 (YU) and GROUND.

^ Is the resistance less than 10,000 ohms?

-> Yes REPAIR the short circuit. For additional information, refer to Vehicle/Diagrams. CLEAR the DTC. TEST the system for normal operation.

-> No GO to Pinpoint Test G307559t49.

G307559t6: CHECK THE GROUND TO THE PRESSURE SENSOR
1. Measure the resistance between EC34, pin 01 (BG) and GROUND.

^ Is the resistance greater than 5 ohms?

-> Yes GO to Pinpoint Test G307559t47.

-> No Contact dealer technical support for advice on possible ABS/DSC module failure.

G307559t47: CHECK THE PRESSURE SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE
1. Measure the resistance between EC34, pin 01 (BG) and EC30, pin 19 (BG).

^ Is the resistance greater than 5 ohms?

-> Yes REPAIR the high resistance circuit. For additional information, refer to Vehicle/Diagrams. CLEAR the DTC. TEST the system for normal operation.

-> No Contact dealer technical support for advice on possible ABS/DSC module failure.

G307559t49: CHECK THE PRESSURE SENSOR GROUND CIRCUIT FOR SHORT TO B+
1. Measure the voltage between the pressure sensor electrical connector EC34, pin 01 (BG) and GROUND.

^ Is the voltage greater than 3 volts?

-> Yes REPAIR the circuit. For additional information, refer to Vehicle/Diagrams. CLEAR the DTC. TEST the system for normal operation.

-> No GO to Pinpoint Test G307559t50.

G307559t50: CHECK THE PRESSURE SENSOR SIGNAL CIRCUIT FOR HIGH RESISTANCE
1. Measure the resistance between EC34, pin 02 (GU) and EC30, pin 20 (GU).

^ Is the resistance greater than 5 ohms?

-> Yes REPAIR the high resistance circuit. For additional information, refer to Vehicle/Diagrams. CLEAR the DTC. TEST the system for normal operation.

-> No GO to Pinpoint Test G307559t51.

G307559t51: CHECK THE PRESSURE SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND
1. Measure the resistance between EC34, pin 02 (GU) and GROUND.

^ Is the resistance less than 10,000 ohms?

-> Yes REPAIR the short circuit. For additional information, refer to Vehicle/Diagrams. CLEAR the DTC. TEST the system for normal operation.

-> No GO to Pinpoint Test G307559t52.

G307559t52: CHECK THE PRESSURE SENSOR SIGNAL CIRCUIT FOR SHORT TO B+
1. Measure the voltage between EC34, pin 02 (GU) and GROUND.

^ Is the voltage greater than 5 volts?

-> Yes REPAIR the short circuit. For additional information, refer to Vehicle/Diagrams. CLEAR the DTC. TEST the system for normal operation.

-> No INSTALL a new pressure sensor. CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, contact dealer technical support for advice on possible ABS/DSC module failure.