DTC P0563

DTC P0563  : PCM Power Source Circuit Unexpected Voltage

NOTE:  Before you troubleshoot, review the general troubleshooting information .

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode.

   -4. Wait 10 seconds.

   -5. Turn the vehicle to the ON mode.

   -6. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P0563 PCM Power Source Circuit Unexpected Voltage

   Is DTC P0563 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at PGM-FI main relay 1 and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot .

2. Determine possible failure area (FI MAIN RLY CL- line, others)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Jump the SCS line with the HDS.

   -3. Disconnect the following connector.

   PCM connector A (51P)

   -4. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector A (51P): disconnected
   Test point 1	PCM connector A (51P) No. 7
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   Go to step 5.

   NO 

   Go to step 3.

3. Shorted wire check (FI MAIN RLY CL- line)

   -1. Remove PGM-FI main relay 1 (A) and the ignition coil relay (B) from the under-hood fuse/relay box.

   Courtesy of HONDA, U.S.A., INC.

   -2. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector A (51P): disconnected
   	PGM-FI main relay 1: disconnected
   	Ignition coil relay: disconnected
   Test point 1	PCM connector A (51P) No. 7
   Test point 2	Body ground

   Is there continuity?

   YES 

   Repair a short in the FI MAIN RLY CL- wire between the PCM (A7) / PGM-FI main relay 1 and the ignition coil relay.

   NO 

   The FI MAIN RLY CL- wire is OK. Go to step 4.

4. Relay check

   -1. Test PGM-FI main relay 1 .

   Is the relay OK?

   YES 

   Update the PCM if it does not have the latest software, or substitute a known-good PCM , then recheck. If DTC P0563 goes away and the PCM was updated, troubleshooting is complete. If DTC P0563 goes away and the PCM was substituted, replace the original PCM .

   NO 

   Replace PGM-FI main relay 1.

5. Shorted wire check (FI MAIN RLY OUT line to power)

   -1. Remove PGM-FI main relay 1 (A) from the under-hood fuse/relay box.

   Courtesy of HONDA, U.S.A., INC.

   -2. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector A (51P): disconnected
   	PGM-FI main relay 1: disconnected
   Test point 1	PCM connector A (51P) No. 9
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   Repair a short to power in the FI MAIN RLY OUT wire between the PCM (A9) and PGM-FI main relay 1.

   NO 

   The FI MAIN RLY OUT wire is OK. Go to step 6.

6. Relay check

   -1. Test PGM-FI main relay 1 .

   Is the relay OK?

   YES 

   PGM-FI main relay 1 is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM , then recheck. If DTC P0563 goes away and the PCM was updated, troubleshooting is complete. If DTC P0563 goes away and the PCM was substituted, replace the original PCM .

   NO 

   Replace PGM-FI main relay 1.