LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 2008 >> Allure CXL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 3.8L - DTC P0385 To DTC P2108 >> DTC P1350 >> Circuit/System Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Testing

  1. Ignition OFF, disconnect the IC module connector. Test for less than 5 ohms between the IC module low reference circuit IC module terminal L and ground.
    • If greater than the specified value, test the ground circuit IC module terminal K for an open/high resistance.
  2. Test for less than 3 ohms between the IC module ground circuit IC module terminal K and battery ground.
    • If greater than the specified value, test the ground circuit for an open/high resistance.
  3. Ignition ON, test for B+ between the IC module ignition voltage circuit IC module terminal P and ground.
    • If less than the specified range, test the IC module ignition voltage circuit for an open/high resistance or short to ground.
  4. Ignition ON, using a jumper wire connected to B+, momentarily touch the low resolution engine speed signal circuit IC module terminal D at the IC module connector repeatedly, while measuring the voltage on the IC timing signal circuit IC module terminal B with a DMM. The voltage should be between 4.8-5.2 volts.
    • If less than the specified range, test the IC timing signal circuit for an open/high resistance, short to ground. If the circuit tests OK, test the IC timing control circuit IC module terminal A for a short to ground. If both circuits test OK, replace the PCM.
    • If the more than the specified range, test the IC timing signal circuit for a short to voltage.
  5. If all circuits test OK, replace the IC module.
scientia non olet · About LEMON Manuals