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
   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 on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot .

2. Relay check

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

   -2. Remove PGM-FI main relay 1 .

   -3. Test PGM-FI main relay 1 .

   Is the relay OK?

   YES 

   Go to step 3.

   NO 

   Replace PGM-FI main relay 1.

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

   -1. Jump the SCS line with the HDS, and wait more than 1 minute.

   -2. Disconnect the following connector.

   PCM connector A (50P)

   -3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PGM-FI main relay 1: disconnected
   	PCM connector A (50P): disconnected
   Test point 1	PCM connector A (50P) No. 22
   Test point 2	Body ground

   Is there continuity?

   YES 

   Repair a short in the FI MAIN RLY CL- wire between the PCM (A22) and PGM-FI main relay 1.

   NO 

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

4. Shorted wire check (IGP1 line to power)

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

   Test condition	Vehicle OFF (LOCK) mode
   	PGM-FI main relay 1: disconnected
   	PCM connector A (50P): disconnected
   Test point 1	PCM connector A (50P) No. 4
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   Repair a short to power in the IGP1 wire between the PCM (A4) and PGM-FI main relay 1.

   NO 

   The IGP1 wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM , then recheck. If DTC P0563 goes away and the PCM was substituted, replace the original PCM .