XB137 - Were KOEO Code 524 and/or 543 Present In XB136

- Were Key On Engine Off (KOEO) Diagnostic Trouble Code (DTC) 524 and/or 543 received from KOEO Self-Test in XB136?

Yes -- Go to XB144. XB144 - Does Engine Start With HFP Relay Disconnected

Be aware that an over current condition (short to GND) was present sometime during the last 80 warm-up cycles.

No -- Go to XB147. XB147 - Power to Pump Circuit: Intermittent Short to Ground