DTC P1536: PGM-FI Main Relay Circuit Malfunction Turn the ignition switch ON (II). Clear the DTC with the HDS. Check for Temporary DTCs or DTCs with the HDS. Is DTC P1536 indicated?
YES | - | Go to Step 4 .
NO | - | Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at PGM-FI main relay 1 and the ECM.■
Turn the ignition switch OFF. Substitute a known-good PGM-FI main relay 1. Turn the ignition switch ON (II). Clear the DTC with the HDS. Check for Temporary DTCs or DTCs with the HDS. Is DTC P1536 indicated?
YES | - | Go to Step 11 .
NO | - | Replace original PGM-FI main relay 1, then go to Step 9 .
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 P1536 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 | - | 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 P1536 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. ■