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.

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(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.

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(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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