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DTC 44 Right Front TCS Pilot Valve Fault: Notes

Right front TCS pilot valve in BPM valve may be commanded to close, isolating master cylinder. Pilot valve circuits receive power through valve relay on BPM valve. Valve relay is engaged at key on and remains engaged throughout ignition cycle. Valve solenoid circuits should have battery voltage available at all times.

When ignition switch is turned to RUN position, power is supplied to EBTCM/EBCM. EBTCM/EBCM will complete an internal self-check before providing ground to valve relay. When valve relay is energized, battery voltage is supplied to valve solenoids.

DTC 44 sets when expected position of right front TCS pilot valve does not match commanded position from EBTCM/EBCM. Conditions that could cause DTC 44 to set are damage to right front TCS pilot valve, open circuit, or short circuit to ground or battery voltage on circuit No. 1658.

NOTE: Test numbers refer to numbers on diagnostic chart.
  1. Damage to circuit No. 886 may result in multiple pilot valve DTCs.
  2. Checks circuit No. 886 for opens or high resistance between EBTCM/EBCM terminals No. 23 and 32.
  3. Determines which branch of circuit No. 886 has an open or high resistance.
  4. Checks integrity of circuits No. 1658 and 886, TCS pilot valve circuitry internal to BPM valve, and TCS pilot valve coil.
  5. Checks whether a problem found in step 4) is caused by an open circuit in circuit No. 886 or 1658, or faulty BPM valve.
  6. Checks whether problem found in step 4) is caused by an open circuit in circuit No. 886 or 1658.
  7. Checks for a short to battery voltage in circuit No. 886 using EBTCM terminal No. 20 as a ground.
  8. Checks for a short to battery voltage in circuit No. 1658, using EBTCM terminal No. 20 as a ground.
  9. Checks for a short to ground in circuit No. 886 using EBTCM terminal No. 20 as a ground.
  10. Checks for a short to ground in circuit No. 1658, using EBTCM terminal No. 20 as a ground.
  11. Checks for connector or wiring problems which could cause intermittents.
  12. Uses Tech 1 to operate TCS pilot valve.
  13. Determines whether DTC was set by an intermittent condition or EBTCM fault.
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