Service Manual (KLZ1000C) — page 662 of 762

Self-Diagnosis System › ECU Communication Line Circuit
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17-60 SELF-DIAGNOSIS SYSTEM
ECU Communication Error (Service Code 39) (DTC U0001)
ECU Communication Line Inspection
○When the data is not sent from the ECU to the meter unit,
 the service code 39 is displayed.
○The data is sent through the CAN communication line.
○The service code 39 is detected with the meter unit.
• Remove    the ECU, and inspect the CAN communication
  line resistance.
• Connect   a digital meter [A] to the ECU connector [B].
• resistor. the resistance of the CAN communication line
  Measure

 CAN Communication Line Resistance (at ECU Connector)
  Connections: Terminal 63 ←→Terminal 64
    Standard:      123  125 Ω
 If the reading is out of the standard, replace the ECU.
 If the reading is within the standard, resistor of the ECU
 for CAN communication line is normal. Check the wiring
 according following procedure.

• Remove   the ECU and meter unit, and check the wiring for
  continuity between harness connectors.
○Disconnect the ECU and meter unit connectors.
 Wiring Continuity Inspection
  ECU Connector [A] ←→ Meter Unit Connector [B]
        ECU Terminal 63 [C] ←→ Meter Unit Terminal [D]
        ECU Terminal 64 [E] ←→ Meter Unit Terminal [F]
 If the wiring is good, check the meter unit (see Meter Unit
 Inspection(16-76)).
 If the meter unit is normal, replace the ECU.
ECU Communication Line Circuit

   1. Meter Unit
   2. Joint Connector (2)
   3. ECU