Toyota CH-R Service Manual: Terminals Of Ecu

Toyota CH-R Service Manual / Door Lock / Wireless Door Lock Control System(w/o Smart Key System) / Terminals Of Ecu

TERMINALS OF ECU

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

*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.

Click here

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

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 the instrument panel junction block assembly.

Click here

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
3H-8 (ACT-) - Body ground	LA-B - Body ground	Door lock motor unlock drive output	Door control switch or driver door key cylinder off	Below 1 V
3H-8 (ACT-) - Body ground	LA-B - Body ground	Door lock motor unlock drive output	Door control switch or driver door key cylinder unlocked	11 to 14 V
3H-9 (ACT-) - Body ground	B - Body ground	Door lock motor unlock drive output	Door control switch or driver door key cylinder off	Below 1 V
3H-9 (ACT-) - Body ground	B - Body ground	Door lock motor unlock drive output	Door control switch or driver door key cylinder unlocked	11 to 14 V
3H-6 (ACT+) - Body ground	R - Body ground	Door lock motor lock drive output	Door control switch or driver door key cylinder off	Below 1 V
3H-6 (ACT+) - Body ground	R - Body ground	Door lock motor lock drive output	Door control switch or driver door key cylinder locked	11 to 14 V
3H-18 (ACT+) - Body ground	R - Body ground	Door lock motor lock drive output	Door control switch or driver door key cylinder off	Below 1 V
3H-18 (ACT+) - Body ground	R - Body ground	Door lock motor lock drive output	Door control switch or driver door key cylinder locked	11 to 14 V
3D-4 (ACTD) - Body ground	B - Body ground	Door lock motor unlock drive output	Door control switch or driver door key cylinder off → on (unlock)	Below 1 V → 11 to 14 V → Below 1 V
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
F15-27 (FRCY) - Body ground	BR - Body ground	Front door courtesy light switch (for RH) input	Front door RH open	Below 1 V
F15-27 (FRCY) - Body ground	BR - Body ground	Front door courtesy light switch (for RH) input	Front door RH closed	Pulse generation
3H-24 (LCTY) - Body ground	BR - Body ground	Rear door courtesy light switch (for LH) input	Rear door LH open	Below 1 V
3H-24 (LCTY) - Body ground	BR - Body ground	Rear door courtesy light switch (for LH) input	Rear door LH closed	Pulse generation
3A-31 (RCTY) - Body ground	BR - Body ground	Rear door courtesy light switch (for RH) input	Rear door RH open	Below 1 V
3A-31 (RCTY) - Body ground	BR - Body ground	Rear door courtesy light switch (for RH) input	Rear door RH closed	Pulse generation
3D-13 (LSFL) - Body ground	B - Body ground	Front door LH unlock detection switch input	Front door LH unlocked	Below 1 V
3D-13 (LSFL) - Body ground	B - Body ground	Front door LH unlock detection switch input	Front door LH locked	Pulse generation
3D-12 (LSFR) - Body ground	GR - Body ground	Front door RH unlock detection switch input	Front door RH unlocked	Below 1 V
3D-12 (LSFR) - Body ground	GR - Body ground	Front door RH unlock detection switch input	Front door RH locked	Pulse generation
3D-14 (LSR) - Body ground	LG - Body ground	Rear door LH/RH unlock detection switch input	Rear door LH or RH unlocked	Below 1 V
3D-14 (LSR) - Body ground	LG - Body ground	Rear door LH/RH unlock detection switch input	Rear door LH and RH locked	Pulse generation
F15-5 (PRG) - Body ground	GR - Body ground	Signal output to door control and tire pressure monitoring system receiver assembly	Key inserted into ignition key cylinder → Key pulled out of ignition key cylinder	11 to 14 V → Pulse generation → 11 to 14 V
F15-4 (RDA) - Body ground	LG - Body ground	Signal input from door control and tire pressure monitoring system receiver assembly	Ignition switch off, all doors closed and door control transmitter assembly switch not pressed	11 to 14 V
F15-4 (RDA) - Body ground	LG - Body ground		Ignition switch off, all doors closed and door control transmitter assembly switch pressed	Pulse generation (0 to 12 V)
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
3F-29 (BZR) - Body ground*1	L - Body ground	Wireless door lock buzzer signal	Wireless door lock buzzer off	Below 1 V
3F-29 (BZR) - Body ground*1	L - Body ground	Wireless door lock buzzer signal	Wireless door lock buzzer on	Pulse generation

*1: w/ Toyota Safety Sense P

If the result is not as specified, the main body ECU (multiplex network body ECU) or instrument panel junction block assembly may be malfunctioning.

CHECK DOOR CONTROL AND TIRE PRESSURE MONITORING SYSTEM RECEIVER ASSEMBLY

(a) Disconnect the M23 door control and tire pressure monitoring system receiver assembly.

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

HINT:

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
M23-7 (+B) - Body ground	R - Body ground	Battery power supply	Always	11 to 14 V
M23-12 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
M23-5 (PRG) - M23-12 (GND)	W - W-B	Signal input from main body ECU (multiplex network body ECU)	Key inserted into ignition key cylinder → Key pulled out of ignition key cylinder	11 to 14 V → Pulse generation → 11 to 14 V
M23-4 (RDA) - M23-12 (GND)	G - W-B	Signal output to main body ECU (multiplex network body ECU)	Ignition switch off, all doors closed and door control transmitter assembly switch not pressed	11 to 14 V
Ignition switch off, all doors closed and door control transmitter assembly switch pressed	Pulse generation (0 to 12 V)

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

M23-5 (PRG) - M23-12 (GND)

W - W-B

Signal input from main body ECU (multiplex network body ECU)

Key inserted into ignition key cylinder → Key pulled out of ignition key cylinder

11 to 14 V → Pulse generation → 11 to 14 V

M23-4 (RDA) - M23-12 (GND)

G - W-B

Signal output to main body ECU (multiplex network body ECU)

Ignition switch off, all doors closed and door control transmitter assembly switch not pressed

11 to 14 V

Ignition switch off, all doors closed and door control transmitter assembly switch pressed

Pulse generation

(0 to 12 V)

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