DTC Troubleshooting: P0563 (34)

DTC P0563: ECM/PCM Power Source Circuit Unexpected Voltage Turn the ignition switch ON (II). Clear the DTC with the HDS. Turn the ignition switch OFF. Wait 10 seconds. Turn the ignition switch ON (II). Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS. Is DTC P0563 indicated?
YES | - | Go to Step 7 .
NO | - | Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the No. 8 FI ECU (ECM/PCM) (15 A) fuse in the under-hood fuse/relay box, PGM-FI main relay 1 (FI MAIN) and at the ECM/PCM.■
Turn the ignition switch OFF. Jump the SCS line with the HDS. Disconnect ECM/PCM connector E (31P). Measure voltage between ECM/PCM connector terminal E7 and body ground. Is there battery voltage?
YES | - | Go to Step 13 .
NO | - | Go to Step 11 .

Remove the kick panel, then remove PGM-FI main relay 1 (FI MAIN) (A) from the under-dash fuse/relay box. |

Check for continuity between ECM/PCM connector terminal E7 and body ground. Is there continuity?
YES | - | Repair short in the wire between the ECM/PCM (E7) and PGM-FI main relay 1 (FI MAIN), then go to Step 20 .
NO | - | Go to Step 19 .
Reconnect ECM/PCM connector E (31P). |

Measure voltage between ECM/PCM connector terminal E7 and body ground. Is there battery voltage?
YES | - | Go to Step 15 .
NO | - | Go to Step 26 .
Disconnect ECM/PCM connector A (31P). |

Measure voltage between body ground and ECM/PCM connector terminals A3 and A2 individually. Is there battery voltage?
YES | - | Go to Step 17 .
NO | - | Go to Step 27 .

Remove the kick panel, then remove PGM-FI main relay 1 (FI MAIN) (A) from the under-dash fuse/relay box. |

Measure voltage between body ground and ECM/PCM connector terminals A3 and A2 individually. Is there battery voltage?
YES | - | Repair short to power in the wire between the ECM/PCM (A2, A3) and PGM-FI main relay 1 (FI MAIN), then go to Step 20 .
NO | - | Go to Step 19 .

Replace PGM-FI main relay 1 (FI MAIN) (A). Reconnect all connectors. Turn the ignition switch ON (II). Clear the DTC with the HDS. Turn the ignition switch OFF. Wait 10 seconds. Do the ECM/PCM idle learn procedure. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS. Are any Temporary DTCs or DTCs indicated?
YES | - | If DTC P0563 is indicated, check for poor connections or loose terminals at PGM-FI main relay 1 (FI MAIN) and the ECM/PCM, 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/PCM if it does not have the latest software, or substitute a known-good ECM/PCM. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS. Are any Temporary DTCs or DTCs indicated?
YES | - | If DTC P0563 is indicated, check for poor connections or loose terminals at PGM-FI main relay 1 (FI MAIN) and the ECM/PCM, 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/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM. ■