Toyota CH-R Service Manual: Terminals Of Ecu

Toyota CH-R Service Manual / Door Lock / Key Reminder Warning System / Terminals Of Ecu

TERMINALS OF ECU

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*A	Main Body ECU (Multiplex Network Body ECU) with 2 Connectors	-	-
*1	Main Body ECU (Multiplex Network Body ECU)	-	-
*a	2 Connectors	-	-

*A	Main Body ECU (Multiplex Network Body ECU) with 1 Connector	-	-
*1	Main Body ECU (Multiplex Network Body ECU)	-	-
*a	1 Connector	-	-

(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.

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	-	ACC power supply	Ignition switch ACC	11 to 14 V
MB-30 (ACC) - Body ground	-	ACC power supply	Ignition switch off	Below 1 V
MB-32 (IG) - Body ground	-	IG power supply	Ignition switch ON	11 to 14 V
MB-32 (IG) - Body ground	-	IG power supply	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 and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F15-6 (FLCY) - Body ground	R - Body ground	Front door courtesy light switch (for LH) input	Front door LH open	Below 1 V
F15-6 (FLCY) - Body ground	R - Body ground	Front door courtesy light switch (for LH) input	Front door LH closed	Pulse generation
3A-41 (KSW) - Body ground	V - Body ground	Key unlock warning switch input	No key in ignition key cylinder	Pulse generation
3A-41 (KSW) - Body ground	V - Body ground	Key unlock warning switch input	Key in ignition key cylinder	Below 1 V

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