Circuit/System Verification
- Engine running.
- Verify DTC B144B is not set.
- If the DTC is set
Refer to DTC B144B .
- Go to next step: If the DTC is not set
- If the DTC is set
- Verify the scan tool control module Ignition 1 Signal parameter is between 12.6 - 15 V.
- If not between 12.6 - 15 V
Refer to Circuit/System Testing.
- Go to next step: If between 12.6 - 15 V
- If not between 12.6 - 15 V
- Verify that the DTC does not reset by operating the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions you observe from the Freeze Frame/Failure Records data. If the vehicle passes the Circuit/System Verification procedure, then STOP. Do not perform the Circuit/System Testing or Component Testing as this may result in an unnecessary part replacement. Refer to Testing for Intermittent Conditions and Poor Connections .