DTC P1030: Fuel Heater Circuit Malfunction

1. Turn the ignition switch ON (II).

1. Clear the DTC with the HDS.

1. Do the FUEL HEATER ON/OFF in the INSPECTION MENU with the HDS.

1. 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.■

1. Turn the ignition switch OFF.

1. 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 .

1. 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 .

1. Disconnect the fuel heater relay.

1. 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 .

1. 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 .

1. Disconnect the fuel heater 2P connector.

1. Disconnect ECM connector No. 1 (96P).