DTC Troubleshooting: P1298
DTC P1298: ELD Circuit High Voltage
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P1298 ELD Circuit High Voltage
      

1.
Problem verification:

Problem verification
?1.
Press the engine start/stop button to select the ON mode.

?2.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
ELD (ELECTRIC LOAD VALUE)
Less than 0.2
A
    

Do the current condition(s) match the threshold?

     
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 the ELD and the PCM.?
2.
Open wire check (IG1 ACG line):

Open wire check (IG1 ACG line)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.

?3.
Press the engine start/stop button to select the ON mode.

?4.
Measure the voltage between test points 1 and 2.
Test condition
ON mode
 
ELD 3P connector: disconnected
Test circuit
IG1 ACG
Test point 1
ELD 3P connector No. 3 (PNK)
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
The IG1 ACG wire is OK. Go to step 3.
     
NO
     
     
     
Check the No. B13 (15 A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair an open in the IG1 ACG wire between the No. B13 (15 A) fuse and the ELD, then do the repair verification.
3.
Open wire check (ELD line):

Open wire check (ELD line)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connector.

?4.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
ELD 3P connector: disconnected
 
PCM connector A (51P): disconnected
Test circuit
ELD
Test point 1
ELD 3P connector No. 1 (WHT)
Test point 2
PCM connector A (51P) No. 22 (WHT)


Is there continuity?

     
YES
     
     
     
The ELD wire is OK. Go to step 4.
     
NO
     
     
     
Repair an open in the ELD wire between the PCM (A22) and the ELD, then do the repair verification.
4.
Open wire check (GND line):

Open wire check (GND line)
?1.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
ELD 3P connector: disconnected
 
PCM connector A (51P): disconnected
Test circuit
GND
Test point 1
ELD 3P connector No. 2 (BLK)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
The GND wire is OK. Go to step 5.
     
NO
     
     
     
Repair an open in the GND wire between the ELD and G301, then do the repair verification.
5.
ELD check (substitution):

ELD check (substitution)
?1.
Substitute a known-good ELD.

?2.
Reconnect all connectors.

?3.
Press the engine start/stop button to select the ON mode.

?4.
Reset the PCM with the HDS.


?5.
Do the PCM idle learn procedure.

?6.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P1298 ELD Circuit High Voltage
      

Is DTC P1298 indicated?

     
YES
     
     
     
Update the PCM if it does not have the latest software, or substitute a known-good PCM, then do the repair verification.?
     
NO
     
     
     
Repair verification:

?1.
Press the engine start/stop button to select the OFF mode.

?2.
Reconnect all connectors.

?3.
Exit the SCS mode with the HDS.


?4.
Press the engine start/stop button to select the ON mode.

?5.
Reset the PCM with the HDS.


?6.
Do the PCM idle learn procedure.

?7.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P1298 ELD Circuit High Voltage
      


Is DTC P1298 indicated?

     
YES
     
     
     
Check for poor connections or loose terminals at the ELD and the PCM. If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, go to step 1.
     
NO
     
     
     
Troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.?