Toyota CH-R Service Manual: Terminals Of Ecu

Toyota CH-R Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System / Terminals Of Ecu

TERMINALS OF ECU

TERMINALS OF ECU

Component without harness connected

(Skid Control ECU (Brake Actuator Assembly))

Terminal No. (Symbol)	Terminal Description
1 (+BM)	ABS motor relay power supply
2	-
3	-
4	- (Not used)
5 (CANH)	CAN communication line H
6 (CSW)	VSC OFF switch input
7 (FL-)	Front wheel speed LH (-) signal input
8	- (Not used)
9	- (Not used)
10 (STPO)	Stop light control relay output
11	- (Not used)
12	-
13	-
14 (GND2)	Pump motor ground
15	-
16	-
17 (FSW+)	Brake pedal load sensing switch input
18	- (Not used)
19 (CANL)	CAN communication line L
20	- (Not used)
21 (FR+)	Front wheel speed RH (+) signal input
22 (RR+)	Rear wheel speed RH (+) signal input
23 (RL-)	Rear wheel speed LH (-) signal input
24 (FL+)	Front wheel speed LH (+) signal input
25	- (Not used)
26 (FR-)	Front wheel speed RH (-) signal input
27	- (Not used)
28	- (Not used)
29	- (Not used)
30 (+BS)	ABS solenoid relay power supply
31	-
32	-
33	-
34 (SP1)	Speed signal output for speedometer
35	-
36 (IG1)	IG1 power source input
37 (RR-)	Rear wheel speed RH (-) signal input
38	- (Not used)
39 (RL+)	Rear wheel speed LH (+) signal input
40	- (Not used)
41	- (Not used)
42 (STP)	Stop light control relay input
43 (HZRI)	Brake hold switch input
44 (STP2)	Stop light switch input
45	-
46 (GND1)	Skid control ECU ground

TERMINAL INSPECTION

(a) Disconnect the connector and measure the voltage and resistance on the wire harness side.

HINT:

The voltage cannot be measured with the connector connected to the skid control ECU (brake actuator assembly) because the connector is watertight.

Standard

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A42-1 (+BM) - Body ground	L - Body ground	ABS motor relay power supply	Always	11 to 14 V
A42-6 (CSW) - Body ground	R - Body ground	VSC OFF switch input	VSC OFF switch ON → OFF (Pressed → not pressed)	Below 1 Ω → 10 kΩ or higher
A42-10 (STPO) - Body ground	R - Body ground	Stop light control relay (stop light switch assembly) output	Ignition switch ON	11 to 14 V
A42-14 (GND2) - Body ground	W-B - Body ground	Pump motor ground	Always	Below 1 Ω
A42-17 (FSW+) - Body ground	GR - Body ground	Brake pedal load sensing switch input	Brake pedal load sensing switch OFF → ON (Brake pedal depressed → released)	950 to 1050 Ω → 203 to 223 Ω
A42-30 (+BS) - Body ground	W - Body ground	ABS solenoid relay power supply	Always	11 to 14 V
A42-36 (IG1) - Body ground	B - Body ground	IG1 power source input	Ignition switch ON	11 to 14 V
A42-42 (STP) - Body ground	SB - Body ground	Stop light control relay (stop light switch assembly) output	Stop light switch ON → OFF (Brake pedal depressed → released)	11 to 14 V* → Below 1.5 V
A42-43 (HZRI) - Body ground	B - Body ground	Brake hold switch input	Brake hold switch ON → OFF (Pressed → not pressed)	Below 1 Ω → 10 kΩ or higher
A42-44 (STP2) - Body ground	L - Body ground	Stop light switch input	Stop light switch assembly ON → OFF (Brake pedal depressed → released)	11 to 14 V* → Below 1.5 V
A42-46 (GND1) - Body ground	W-B - Body ground	Skid control ECU ground	Always	Below 1 Ω

HINT:

*: The standard voltage value varies depending on the +BS terminal voltage value. The standard voltage is 85% of the +BS terminal voltage.

*a	Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

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