DTC Troubleshooting: P1298
DTC P1298: ELD Circuit High Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information.

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

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to 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. 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.
Open wire check (IG1 ACG line):

Open wire check (IG1 ACG line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
ELD 3P connector

?3.
Turn the vehicle to the ON mode.

?4.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
ELD 3P connector: disconnected
Test point 1
ELD 3P connector No. 3
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
The IG1 ACG wire is OK. Go to step 3.
     
NO
     
     
     
Check the No. B2 (10 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. B2 (10 A) fuse and the ELD.?
3.
Open wire check (ELD line):

Open wire check (ELD line)
?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 (51P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
ELD 3P connector: disconnected
 
PCM connector A (51P): disconnected
Test point 1
ELD 3P connector No. 1
Test point 2
PCM connector A (51P) No. 46


Is there continuity?

     
YES
     
     
     
The ELD wire is OK. Go to step 4.
     
NO
     
     
     
Repair an open in the ELD wire between the PCM (A46) and the ELD.?
4.
Open wire check (GND line):

Open wire check (GND line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
ELD 3P connector: disconnected
 
PCM connector A (51P): disconnected
Test point 1
ELD 3P connector No. 2
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 G302.?
5.
ELD check (substitution):

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

?2.
Reconnect all connectors.

?3.
Turn the vehicle to 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 recheck. If DTC P1298 goes away and the PCM was updated, troubleshooting is complete. If DTC P1298 goes away and the PCM was substituted, replace the original PCM.?
     
NO