DTC Troubleshooting: P1032 (183-5)

DTC P1032: Fuel Heater Relay Circuit Open

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 P1032 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 the No. 8 FI ECU (ECM) (20 A) fuse in the under-hood fuse/relay box.

Is the fuse OK?

YES | - | Go to Step 7 .
NO | - | Repair short in the wire between the No. 8 FI ECU (ECM) (20 A) fuse and the fuel heater relay. Also replace the No. 8 FI ECU (ECM) (20 A) fuse, then go to Step 13 .

1. Remove the left front inner fender. Open the relay holder (A), and disconnect the fuel heater relay.

1. Check the fuel heater relay.

Is the fuel heater relay OK?

YES | - | Go to Step 9 .
NO | - | Replace the fuel heater relay, then go to Step 13 .

1. Measure voltage between fuel heater relay 5P connector terminal No. 5 and body ground.

Is there battery voltage?

YES | - | Go to Step 10 .
NO | - | Repair open in the wire between the No. 8 FI ECU (ECM) (20 A) fuse and the fuel heater relay, then go to Step 13 .

1. Disconnect ECM connector No. 2 (58P).

1. Connect fuel heater relay 5P connector terminal No. 3 to body ground with a jumper wire.

1. Check for continuity between ECM connector No. 2 terminal No. 41 and body ground.

Is there continuity?

YES | - | Go to Step 18 .
NO | - | Repair open in the wire between the fuel heater relay and ECM connector No. 2 terminal No. 41, then go to Step 13 .

1. Reconnect all connectors.

1. Turn the ignition switch ON (II).

1. Reset the ECM 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.

Are any Temporary DTCs or DTCs indicated?

YES | - | If DTC P1032 is indicated, check for poor connections or loose terminals at the fuel heater relay and the ECM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | Troubleshooting is complete.■

1. Update the ECM if it does not have the latest software, or substitute a known-good ECM.

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

1. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES | - | If DTC P1032 is indicated, check for poor connections or loose terminals at the fuel heater relay and the ECM, 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 was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. ■