Toyota CH-R Service Manual: Terminals Of Ecu

TERMINALS OF ECU

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (w/ Retract Mirror)

(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

Click here

(b) Reconnect the instrument panel junction block assembly connectors.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

MB-11 (GND1) - Body ground

-

Ground

Always

Below 1 Ω

MB-31 (BECU) - Body ground

-

Battery power supply

Always

11 to 14 V

MB-30 (ACC) - Body ground

-

Ignition power supply (ACC signal)

Ignition switch ACC

11 to 14 V

MB-30 (ACC) - Body ground

-

Ignition power supply (ACC signal)

Ignition switch off

Below 1 V

MB-32 (IG) - Body ground

-

Ignition power supply (IG signal)

Ignition switch ON

11 to 14 V

MB-32 (IG) - Body ground

-

Ignition power supply (IG signal)

Ignition switch off

Below 1 V

(d) Install the main body ECU (multiplex network body ECU) to instrument panel junction block assembly.

Click here

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F16-14 (RET) - Body ground

B - Body ground

Power retract mirror motor drive voltage

Mirror retract switch on outer mirror switch assembly retracted position.

Below 1 V

Mirror retract switch on outer mirror switch assembly driving position.

11 to 14 V

F16-15 (RTR) - Body ground

P - Body ground

Power retract mirror motor drive voltage

Mirror retract switch on outer mirror switch assembly auto retracted position.

Below 1 V

Mirror retract switch on outer mirror switch assembly driving position.

11 to 14 V

F16-19 (RETR) - Body ground

L - Body ground

Power retract mirror motor drive voltage

Outer rear view mirror assembly moves to the retracted position.

Below 1 V

Outer rear view mirror assembly not move.

11 to 14 V

F16-20 (RTRR) - Body ground

R - Body ground

Power retract mirror motor drive voltage

Outer rear view mirror assembly moves to the driving position.

Below 1 V

Outer rear view mirror assembly not move.

11 to 14 V

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

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CHECK AIR CONDITIONING CONTROL ASSEMBLY

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