Component Testing

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

Static Test

Ignition OFF, disconnect the harness connector at the G18 High Pressure Fuel Pump.

NOTE:

The DMM and test leads must be calibrated to 0 Ω in order to prevent misdiagnosis.

Test for 9-12 Ω between low control circuit terminal 1 and high control circuit terminal 2.
- If not within the specified range
  Replace the G18 High Pressure Fuel Pump.
- If within the specified range
Test for infinite resistance between each terminal and the high pressure fuel pump housing/case.
- If less than infinite resistance
  Replace the G18 High Pressure Fuel Pump.
- If infinite resistance
All OK.