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. Determine possible failure area (FI_MAIN_RLY_OUT line, others)

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

   -2. Jump the SCS line with the HDS, and wait more than 1 minute.

   -3. Disconnect the following connector.

   PCM connector A (50P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector A (50P): disconnected
   Test point 1	PCM connector A (50P) No. 8
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   Go to step 4.

   NO 

   Go to step 3.

3. Shorted wire check (FI_MAIN_RLY_CL- line)

   -1. Disconnect the following connector.

   Relay circuit board connector C (18P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector A (50P): disconnected
   	Relay circuit board connector C (18P): disconnected
   Test point 1	PCM connector A (50P) No. 5
   Test point 2	Body ground

   Is there 1 MΩ or more?

   YES 

   Go to step 5.

   NO 

   Repair a short in the FI_MAIN_RLY_CL- wire between the PCM (A5) and the relay circuit board.

4. Shorted wire check (FI_MAIN_RLY_OUT line to power)

   -1. Disconnect the following connector.

   Relay circuit board connector C (18P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector A (50P): disconnected
   	Relay circuit board connector C (18P): disconnected
   Test point 1	PCM connector A (50P) No. 8
   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 (A8) and the relay circuit board.

   NO 

   Go to step 5.

5. Relay circuit board check

   -1. Remove and test the relay circuit board .

   Is the relay circuit board OK?

   YES 

   Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM .

   NO 

   Replace the relay circuit board .