3-88 FUEL SYSTEM (DFI)

ECU Communication Error (Service Code 39)

ECU Communication Line Inspection

○When the data is not sent from the ECU to the meter unit for more than about 10 seconds, the service code 39 is displayed.

○The service code 39 is detected with meter unit.

•Remove the ECU and meter unit, check the wiring for continuity between main harness connectors.

Special Tool - Hand Tester: 57001-1394

○Disconnect the ECU and meter unit connectors.

Wiring Continuity Inspection

ECU Connector [A] ←→

Meter Unit Connector [B]

BR/R lead (ECU terminal 33) [C]

If the wiring is good, check the meter unit (see Meter Unit Inspection in the Electrical System chapter).

If the meter unit is normal, replace the ECU (see ECU Removal/Installation).

ECU Communication Line Circuit

1.Meter Unit

2.Warning Indicator Light (LED)

3.ECU

4.Frame Ground