Can Communication System Combination Meter Ecu Communication Stop Mode

Power Source Network. Corolla. Zre142 Aze141
Networking. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR OPEN IN CAN NO. 1 BUS WIRE (COMBINATION METER MAIN BUS WIRE)

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

CAN COMMUNICATION SYSTEM - Combination Meter ECU Communication Stop Mode


DESCRIPTION


Detection Item
Symptom
Trouble Area
Combination Meter ECU Communication Stop Mode
  1. "Combination Meter" is not displayed on the "CAN Bus Check" screen of the Techstream
  2. Applies to "Combination Meter ECU Communication Stop Mode" in "DTC Combination Table"
  1. Power source circuit of the combination meter
  2. Combination meter main wire or connector
  3. Combination meter

WIRING DIAGRAM


Corolla. Zre142 Aze141.Networking.Lin Communication System.Can Communication System Combination Meter Ecu Communication Stop Mode


INSPECTION PROCEDURE

NOTICE:
  1. Turn the ignition switch off before measuring the resistance between main CAN bus wires and CAN Bus branch wires.
  2. After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not operating.
  3. 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 any doors need to be opened in order to check the connectors, open the doors and leave them open.
HINT:
  1. Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
1.CHECK FOR OPEN IN CAN NO. 1 BUS WIRE (COMBINATION METER MAIN BUS WIRE)


    Corolla. Zre142 Aze141.Networking.Lin Communication System.Can Communication System Combination Meter Ecu Communication Stop Mode

  1. Turn the ignition switch off.

    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Combination Meter)

  1. Disconnect the combination meter connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E46-27 (CANH) - E46-28 (CANL)
    		Ignition switch off
    		108 to 132 Ω


NG
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (COMBINATION METER MAIN BUS WIRE)
OK


2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    Corolla. Zre142 Aze141.Networking.Lin Communication System.Can Communication System Combination Meter Ecu Communication Stop Mode

  1. Disconnect the combination meter connector.

    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Combination Meter)

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E46-30 (ET) - Body ground
    		Always
    		Below 1 Ω

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E46-33 (IG+) - Body ground
    		Ignition switch ON
    		10 to 14 V
    E46-32 (B) - Body ground
    		Always
    		10 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE COMBINATION METER ASSEMBLY (COROLLA_ZRE142 RM0000024D7032X.html)