DTC Troubleshooting: P1298 (20)

DTC P1298: ELD Circuit High Voltage Start the engine, and let it idle. Check the ELD in the DATA LIST with the HDS. Is 0.2 A or less indicated?
YES | - | Go to Step 3 .
NO | - | Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ELD and the ECM/PCM.■
Turn the ignition switch OFF. Disconnect the ELD 3P connector. Turn the ignition switch ON (II). Measure voltage between ELD 3P connector terminal No. 1 and body ground. Is there battery voltage?
YES | - | Go to Step 7 .
NO | - | Repair open in the wire between the No. 18 ACG (15 A) fuse and the ELD, then go to Step 14 .
Turn the ignition switch OFF. |

Connect ELD 3P connector terminal No. 3 to body ground with a jumper wire. Jump the SCS line with the HDS. Disconnect ECM/PCM connector E (31P). |

Check for continuity between ECM/PCM connector terminal E15 and body ground. Is there continuity?
YES | - | Go to Step 12 .
NO | - | Repair open in the wire between the ECM/PCM (E15) and the ELD, then go to Step 14 .

Check for continuity between ELD 3P connector terminal No. 2 and body ground. Is there continuity?
YES | - | Go to Step 13 .
NO | - | Repair open in the wire between the ELD and G201, then go to Step 14 .
Replace the under-hood fuse/relay box. Reconnect all connectors. Turn the ignition switch ON (II). Reset the ECM/PCM with the HDS. Do the ECM/PCM idle learn procedure. Check for the Temporary DTCs or DTCs MENU with the HDS. Is the DTC P1298 indicated?
YES | - | Go to Step 19 .
NO | - | Troubleshooting is complete.■
Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM. Check for the Temporary DTCs or DTCs MENU with the HDS. Are any Temporary DTCs or DTCs indicated?
YES | - | If DTC P1298 is indicated, check for poor connections or loose terminals at the ELD and the ECM/PCM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM. ■