Toyota Venza manuals

Toyota Venza: ECU Power Source Circuit

DESCRIPTION

This is the power source for the tire pressure warning ECU.

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the tire pressure warning ECU, read the transmitter IDs stored in the old ECU using the Techstream and write them down before removal.
  • It is necessary to perform registration (See page ) of the transmitter IDs into the tire
    pressure warning ECU after the ECU has been replaced.

PROCEDURE

1.

INSPECT FUSE (ECU-IG NO. 2)

(a) Remove the ECU-IG No. 2 fuse from the driver side junction block.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

ECU-IG No. 2 fuse

Always

Below 1 Ω


NG

REPLACE FUSE


OK

2.

INSPECT IGNITION RELAY NO. 1

(a) Remove the IG1 relay from the driver side junction block.


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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 - 5

Battery voltage is not applied between terminals 1 and 2

10 kΩ or higher

Battery voltage is applied between terminals 1 and 2

Below 1 Ω


NG

REPLACE IGNITION RELAY NO. 1


OK

3.

CHECK HARNESS AND CONNECTOR (ECU - BATTERY AND BODY GROUND)

(a) Disconnect the D31 ECU connector.


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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

D31-7 (IG) - Body ground

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

Text in Illustration

*1

Front view of wire harness connector

(to Tire Pressure Warning ECU)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D31-9 (GND) - Body ground

Always

Below 1 Ω


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Transmitter ID1 Operation Stop (C2111/11-C2114/14)
DESCRIPTION The tire pressure warning valve and transmitter installed in each tire and wheel assembly measures the tire pressures. The measured values are transmitted as radio waves to the tire p ...

Tire Pressure Warning Light Circuit
DESCRIPTION If the tire pressure warning ECU detects a malfunction, the tire pressure warning light blinks for 1 minute then stays on and tire pressure monitor is canceled at the same time. At th ...

Other materials about Toyota Venza:

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" ...

Terminals Of Ecu
TERMINALS OF ECU HINT: Check from the rear of the connector while it is connected to the components. 1. NAVIGATION RECEIVER ASSEMBLY Terminal No. (Symbol) Wiring Color Terminal Description Condition ...

Precaution
PRECAUTION 1. NOTICE FOR INITIALIZATION HINT: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected. System Name See procedure Back Door ...

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