17-68 SELF-DIAGNOSIS SYSTEM
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 5 seconds, the service code 39 is
The data is sent through the CAN communication line.
The service code 39 is detected with the meter unit.
When the user mode, this communication error go on or
blink the following items.
Yellow Engine Warning Indicator Light (LED) [A]
Yellow Warning Indicator Light (LED) [B]
KEBC Indicator [C]
KQS Indicator [D]
White Rain Mode Indicator Light (LED) [E]
Inspect the CAN communication line resistance (see CAN
Communication Line Resistance Inspection in the Fuel
System (DFI) chapter).
If the CAN communication line resistance is normal,
check the wiring according following procedure.
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]
LB lead (ECU terminal 60) [C]
GY/BL lead (ECU terminal 61) [D]
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 in the Fuel System (DFI) chapter).