Toyota Venza manuals

Toyota Venza: Combination Meter ECU Communication Stop Mode

Toyota Venza Service Manual / Networking / Can Communication System / Combination Meter ECU Communication Stop Mode

DESCRIPTION

Detection Item

Symptom

Trouble Area

Combination Meter ECU Communication Stop Mode

  • "Combination Meter" is not displayed on "CAN Bus Check" screen of the Techstream.
  • Applies to Combination Meter ECU Communication Stop Mode in DTC Combination Table.
  • Power source circuit of combination meter
  • Combination meter main wire or connector
  • Combination meter

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

  • Turn the ignition switch off before measuring the resistances between CAN bus main wires and between CAN bus branch wires.
  • Turn the ignition switch off before inspecting CAN bus wires for a ground short.
  • After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not operating.
  • 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 connectors, open the doors and leave them open.

HINT:

  • 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.
  • 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.

PROCEDURE

1.

CHECK CAN BUS WIRE FOR DISCONNECTION (COMBINATION METER MAIN WIRE)

(a) Turn the ignition switch off.

(b) Disconnect the connector of the combination meter.

Text in Illustration

*1

Front view of wire harness connector

(to Combination Meter)


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

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

E1-1 (CANH) - E1-9 (CANL)

ignition switch off

108 to 132 Ω


NG

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


OK

2.

CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

E2-13 (IG+) - Body ground

Ignition switch ON

11 to 14 V

E2-14 (B) - Body ground

Always

11 to 14 V

Text in Illustration

*1

Front view of wire harness connector

(to Combination Meter)



NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)


OK

3.

CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)

(a) Turn the ignition switch off.


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

Standard Resistance:

Tester Connection

Condition

Specified Condition

E2-24 (ES) - Body ground

Always

Below 1 Ω

Text in Illustration

*1

Front view of wire harness connector

(to Combination Meter)


OK

REPLACE COMBINATION METER


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)

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