Toyota CH-R Service Manual: Terminals Of Ecu

TERMINALS OF ECU

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (for TMMT Made)

(a) Disconnect the 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

IG power supply

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

F72-29 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

F72-1 (B) - Body ground

V - Body ground

Battery power supply

Always

11 to 14 V

(c) Reconnect the air conditioning amplifier assembly connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

F72-3 (LIN1) - Body ground

L - Body ground

Seat heater switch signal

Ignition switch ON

Pulse generation

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (for TMC Made)

(a) Disconnect the 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

IG power supply

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

F139-4 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

F139-1 (B) - Body ground

V - Body ground

Battery power supply

Always

11 to 14 V

(c) Reconnect the air conditioning amplifier assembly connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

F139-14 (LIN1) - Body ground

BE - Body ground

Seat heater switch signal

Ignition switch ON

Pulse generation

CHECK AIR CONDITIONING CONTROL ASSEMBLY

(a) Disconnect the air conditioning control 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

F61-16 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

F61-10 (IG+) - F61-16 (GND)

BE - W-B

IG power supply

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

(c) Reconnect the air conditioning control assembly connector.

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

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

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

L - W-B

Seat heater switch signal

Ignition switch ON

Pulse generation

F61-4 (RV) - F61-16 (GND)

SB - W-B

Seat heater switch volume signal

Ignition switch ON, seat heater switch (for front passenger side) off

Below 0.6 V

Ignition switch ON, seat heater switch (for front passenger side) HI

3.9 to 5.5 V

Ignition switch ON, seat heater switch (for front passenger side) MID

3.4 to 4.7 V

Ignition switch ON, seat heater switch (for front passenger side) LO

2.5 to 3.5 V

F61-11 (SW) - F61-16 (GND)

R - W-B

Seat heater switch volume signal

Ignition switch ON, seat heater switch (for front passenger side) off

Below 1 V

Ignition switch ON, seat heater switch (for front passenger side) on

11 to 14 V

F61-6 (RV) - F61-16 (GND)

LG - W-B

Seat heater switch volume signal

Ignition switch ON, seat heater switch (for driver side) off

Below 0.6 V

Ignition switch ON, seat heater switch (for driver side) HI

3.9 to 5.5 V

Ignition switch ON, seat heater switch (for driver side) MID

3.4 to 4.7 V

Ignition switch ON, seat heater switch (for driver side) LO

2.5 to 3.5 V

F61-12 (SW) - F61-16 (GND)

P - W-B

Seat heater switch volume signal

Ignition switch ON, seat heater switch (for driver side) off

Below 1 V

Ignition switch ON, seat heater switch (for driver side) on

11 to 14 V

    Problem Symptoms Table
    PROBLEM SYMPTOMS TABLE NOTICE: If the battery voltage is low, the seat heater system may not operate. Refer to Data List for power steering system. Click here HINT: Use the table belo ...

    Diagnosis System
    DIAGNOSIS SYSTEM DESCRIPTION (a) Seat heater system data and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfun ...

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