CAN COMMUNICATION SYSTEM > Combination Meter ECU Communication Stop Mode

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DESCRIPTION


Detection Item
Symptom
Trouble Area
Combination Meter ECU Communication Stop Mode
  1. "Combination Meter" not displayed on "Communication Bus Check" screen of intelligent tester
  2. Applies to "Combination Meter ECU Communication Stop Mode" in "DTC combination table"
  1. Power source circuit of combination meter ECU
  2. Combination meter ECU main wire or connector
  3. Combination Meter Assembly (Combination meter ECU)

WIRING DIAGRAM


C140671E07


E196003E01


INSPECTION PROCEDURE

NOTICE:
  1. Inspect the fuses for circuit related to this system before performing the following inspection procedure.
  2. Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.
  3. After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.
  4. Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If doors need to be opened in order to check connectors, open the doors and leave them open.

HINT:
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

1.CHECK FOR OPEN IN CAN BUS WIRE (COMBINATION METER ECU MAIN WIRE)


    E175991E01

  1. Turn the ignition switch off.

  1. Disconnect the D1 combination meter assembly (combination meter ECU) connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D1-21 (CANH) - D1-20 (CANL)
    		Ignition switch off
    		108 to 132 Ω

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Combination Meter Assembly (Combination Meter ECU))

  1. Reconnect the combination meter assembly (combination meter ECU) connector.



NG
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CAN-H, CAN-L)
OK


2.CHECK HARNESS AND CONNECTOR (COMBINATION METER ECU - BATTERY AND BODY GROUND)


    E175991E02

  1. Disconnect the D1 combination meter assembly (combination meter ECU) connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D1-24 (ET) - Body ground
    		Always
    		Below 1 Ω

  1. Measure the voltage according to the value in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D1-2 (B) - Body ground
    		Always
    		11 to 14 V
    D1-1 (IG+) - Body ground
    		Ignition switch ON
    		11 to 14 V

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Combination Meter Assembly (Combination Meter ECU))

  1. Reconnect the combination meter assembly (combination meter ECU) connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE COMBINATION METER ASSEMBLY (Click here)