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3-90 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.
Disconnect the ECU and meter unit connectors.
Wiring Continuity Inspection
ECU Connector [A] ←→ Meter Unit Connector [B]
BL/O lead (ECU terminal 26) [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. ECU
3. Frame Ground 1
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