Toyota CH-R Service Manual: Terminals Of Ecu

TERMINALS OF ECU

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (for TMMT Made)

(a) Disconnect the F72 air conditioning amplifier assembly connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

F72-5 (IG+) - Body ground

B - Body ground

Power source (IG)

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

F72-1 (B) - Body ground

V - Body ground

Battery power supply

Always

11 to 14 V

F72-29 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the F72 air conditioning amplifier assembly connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

F72-24 (FDEF) - Body ground

W - Body ground

Wiper deicer signal

Ignition switch ON, windshield deicer switch on

Below 1 V

Ignition switch ON, windshield deicer switch off

11 to 14 V

F72-3 (LIN1) - Body ground

L - Body ground

LIN communication line

Ignition switch ON

Pulse generation

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (for TMC Made)

(a) Disconnect the F139 air conditioning amplifier assembly connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

F139-2 (IG+) - Body ground

B - Body ground

Power source (IG)

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

F139-1 (B) - Body ground

V - Body ground

Battery power supply

Always

11 to 14 V

F139-4 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the F139 air conditioning amplifier assembly connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

F139-17 (FDEF) - Body ground

W - Body ground

Wiper deicer signal

Ignition switch ON, windshield deicer switch on

Below 1 V

Ignition switch ON, windshield deicer switch off

11 to 14 V

F139-14 (LIN1) - Body ground

BE - Body ground

LIN communication line

Ignition switch ON

Pulse generation

CHECK AIR CONDITIONING CONTROL ASSEMBLY

(a) Check for pulse according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F61-2 (LIN1) - F61-16 (GND)

L - W-B*1

BE - W-B*2

LIN communication line

Ignition switch ON

Pulse generation

  • *1: for TMMT Made
  • *2: for TMC Made
    Problem Symptoms Table
    PROBLEM SYMPTOMS TABLE NOTICE: If the battery voltage becomes low, windshield deicer operation is canceled to prioritize supplying power to the power steering system. Click here HINT: ...

    Data List / Active Test
    DATA LIST / ACTIVE TEST ACTIVE TEST HINT: Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive ...

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