Toyota CH-R Service Manual: Terminals Of Ecu

Toyota CH-R Service Manual / Door Lock / Power Door Lock Control 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-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-31 (BECU) - Body ground	-	Battery power supply	Always	11 to 14 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 and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F15-2 (UL3) - Body ground	L - Body ground	Driver door key-linked unlock input	Driver door key cylinder in neutral position → on (unlock)	Pulse generation → Below 1 V
F15-29 (L2) - Body ground	G - Body ground	Driver door key-linked lock input	Driver door key cylinder in neutral position → on (lock)	Pulse generation → 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-8 (ACT-) - Body ground	LA-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
3H-9 (ACT-) - 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
3H-6 (ACT+) - Body ground	R - Body ground	Door lock motor lock drive output	Door control switch or driver door key cylinder off → on (lock)	Below 1 V → 11 to 14 V → 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 off → on (lock)	Below 1 V → 11 to 14 V → Below 1 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
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
3H-34 (BCTY) - Body ground	SB - Body ground	Back door courtesy light switch input	Back door open	Below 1 V
3H-34 (BCTY) - Body ground	SB - Body ground	Back door courtesy light switch input	Back door closed	Pulse generation
3H-20 (TR+) - Body ground	Y - Body ground	Back door lock motor drive output	Back door closed → open	Below 1 V → 11 to 14 V → Below 1 V
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
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-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
3A-39 (UL1) - Body ground	SB - Body ground	Door control switch input	Door control switch locked	Below 1 V
3A-39 (UL1) - Body ground	SB - Body ground	Door control switch input	Door control switch off	Pulse generation
3D-16 (L1) - Body ground	B - Body ground	Door control switch input	Door control switch unlocked	Below 1 V
3D-16 (L1) - Body ground	B - Body ground	Door control switch input	Door control switch off	Pulse generation
F15-18 (BDSU) - Body ground*1	LG - Body ground	Back door opener switch input	Back door opener switch pushed	Below 1 V
F15-18 (BDSU) - Body ground*1	LG - Body ground	Back door opener switch input	Back door opener switch not pushed	Pulse generation

*1: w/o Smart Key System

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Smart Key System)

(a) Disconnect the F1 certification ECU (smart key ECU assembly) connector.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F1-4 (+B) - Body ground	L - Body ground	Battery power supply	Always	11 to 14 V
F1-18 (E) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
M67-26 (TSW5) - Body ground	LG - Body ground	Back door opener switch input	Back door opener switch assembly (open switch) off → on	Below 1 V → Pulse generation

CHECK DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY (w/o Toyota Safety Sense P)

(a) Disconnect the F14 double lock door control relay assembly connector.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F14-12 (+B) - Body ground	BE - Body ground	Battery power supply	Ignition switch off	11 to 14 V
F14-11 (CPUB) - Body ground	SB - Body ground	Battery power supply	Ignition switch off	11 to 14 V
F14-7 (GND) - Body ground	LA - Body ground	Ground	Always	Below 1 Ω

(d) 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
F14-8 (ACTS) - Body ground	LG - Body ground	All door double lock motor set on output	Double lock unset	Below 1 V
F14-8 (ACTS) - Body ground	LG - Body ground	All door double lock motor set on output	Double lock set	11 to 14 V
F14-1 (ACTR) - Body ground	GR - Body ground	All door double lock motor set off output	Double lock set	Below 1 V
F14-1 (ACTR) - Body ground	GR - Body ground	All door double lock motor set off output	Double lock unset	11 to 14 V
F14-6 (DLPD) - Body ground	Y - Body ground	Front RH double lock position switch input	Double lock unset	Pulse generation
F14-6 (DLPD) - Body ground	Y - Body ground	Front RH double lock position switch input	Double lock set	Below 1 V
F14-5 (DLPP) - Body ground	V - Body ground	Front LH double lock position switch input	Double lock unset	Pulse generation
F14-5 (DLPP) - Body ground	V - Body ground	Front LH double lock position switch input	Double lock set	Below 1 V
F14-4 (DLPR) - Body ground	B - Body ground	Rear RH double lock position switch input	Double lock unset	Pulse generation
F14-4 (DLPR) - Body ground	B - Body ground	Rear RH double lock position switch input	Double lock set	Below 1 V
F14-3 (DLPL) - Body ground	L - Body ground	Rear LH double lock position switch input	Double lock unset	Pulse generation
F14-3 (DLPL) - Body ground	L - Body ground	Rear LH double lock position switch input	Double lock set	Below 1 V

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are lis ...

Data List / Active Test

DATA LIST / ACTIVE TEST DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any part ...

Other materials:

Toyota CH-R Service Manual > Steering Gear: Installation
INSTALLATION PROCEDURE 1. INSTALL TIE ROD END SUB-ASSEMBLY LH (a) Install the lock nut and tie rod end sub-assembly LH to the steering gear assembly until the matchmarks are aligned. HINT: After adjusting the toe-in, tighten the lock nut. ...

Toyota CH-R Service Manual > Audio And Visual System(for Radio And Display Type): Main Body ECU Vehicle Information Reading/Writing Process Malfunction (B15F6)
DESCRIPTION This DTC is stored when items controlled by the main body ECU (multiplex network body ECU) cannot be customized via the audio and visual system vehicle customization screen. HINT: The main body ECU (multiplex network body ECU) controls the items for the following systems that ar ...

Toyota CH-R Service Manual: Terminals Of Ecu

Problem Symptoms Table

Data List / Active Test

Other materials:

Toyota C-HR (AX20) 2023-2025 Owner's Manual

Toyota CH-R Owners Manual

Toyota CH-R Service Manual