DTC P1030: Fuel Heater Circuit Malfunction Turn the ignition switch ON (II). Clear the DTC with the HDS. Do the FUEL HEATER ON/OFF in the INSPECTION MENU with the HDS. Check for Temporary DTCs or DTCs with the HDS. Is DTC P1030 indicated?
YES | - | Go to Step 5 .
NO | - | Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the fuel heater relay and the ECM.■
Turn the ignition switch OFF. Check No. 2 (7.5 A) fuse in the multi fuse/relay box. Is the fuse OK?
YES | - | Go to Step 7 .
NO | - | Replace No. 2 (7.5 A) fuse, then go to Step 15 .
Check No. 11 +B PTC (FUEL HEATER) (30 A) fuse in the under-hood fuse/relay box. Is the fuse OK?
YES | - | Go to Step 8 .
NO | - | Repair short in the wire between No. 11 +B PTC (FUEL HEATER) (30 A) fuse and the fuel heater relay. Also replace No. 11 +B PTC (FUEL HEATER) (30 A) fuse, then go to Step 15 . Repair short in the wire between the fuel heater relay and No. 2 (7.5 A) fuse in the multi fuse/relay box, then go to Step 15 .
Disconnect the fuel heater relay. Check the fuel heater relay. Is the fuel heater relay OK?
YES | - | Go to Step 10 .
NO | - | Replace the fuel heater relay, then go to Step 14 .
Measure voltage between fuel heater relay 4P connector terminal No. 2 and body ground. Is there battery voltage?
YES | - | Go to Step 11 .
NO | - | Repair open in the wire between No. 11 +B PTC (FUEL HEATER) (30 A) fuse and the fuel heater relay, then go to Step 14 .
Disconnect the fuel heater 2P connector. Disconnect ECM connector No. 1 (96P). |