Measure voltage between ECM connector No. 2 terminal No. 1 and body ground. Is there battery voltage?
YES | - | Repair short to power in the wire between PGM-FI main relay 1 and ECM connector No. 2 terminals No. 1, No. 3 or No. 5, then go to Step 12 .
NO | - | Go to Step 16 .
Reconnect all connectors. Turn the ignition switch ON (II). Reset the ECM with the HDS. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated?
YES | - | If DTC P1623 is indicated, check for poor connections or loose terminals at PGM-FI main relay 1 and ECM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | Troubleshooting is complete.■
Update the ECM if it does not have the latest software, or substitute a known-good ECM. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated?
YES | - | If DTC P1623 is indicated, check for poor connections or loose terminals at PGM-FI main relay 1 and the ECM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. ■