Toyota CH-R Service Manual: Terminals Of Ecu

Toyota CH-R Service Manual / Networking / Lin Communication System / Terminals Of Ecu

TERMINALS OF ECU

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

1 Connector Type

2 Connector Type

(a) Disconnect the MB main body ECU (multiplex network body ECU) connector.

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(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.

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

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
3H-25 (LIN2) - Body ground	LG - Body ground	LIN communication line	Ignition switch ON	Pulse generation
3D-17 (LIN2) - Body ground*1	P - Body ground	LIN communication line	Ignition switch ON	Pulse generation

*1: w/ Double Locking System

CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door)

(a) Disconnect the J2 power window regulator motor assembly (for driver door) connector.

(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 connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
J2-2 (B) - Body ground	L - Body ground	Battery power supply	Always	11 to 14 V
J2-1 (GND) - 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
J2-9 (LIN) - Body ground	R - Body ground	LIN communication line	Ignition switch ON	Pulse generation

CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door)

(a) Disconnect the I2 power window regulator motor assembly (for front passenger door) connector.

(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 connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
I2-2 (B) - Body ground	L - Body ground	Battery power supply	Always	11 to 14 V
I2-1 (GND) - 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
I2-9 (LIN) - Body ground	P - Body ground	LIN communication line	Ignition switch ON	Pulse generation

CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door)

(a) Disconnect the K2 power window regulator motor assembly (for rear RH door) connector.

(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 connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
K2-2 (B) - Body ground	R - Body ground	Battery power supply	Always	11 to 14 V
K2-1 (GND) - 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
K2-9 (LIN) - Body ground	LG - Body ground	LIN communication line	Ignition switch ON	Pulse generation

CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door)

(a) Disconnect the L2 power window regulator motor assembly (for rear LH door) connector.

(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 connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
L2-2 (B) - Body ground	R - Body ground	Battery power supply	Always	11 to 14 V
L2-1 (GND) - 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
L2-9 (LIN) - Body ground	LG - Body ground	LIN communication line	Ignition switch ON	Pulse generation

CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

(a) Disconnect the J6 multiplex network master switch assembly connector.

(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 connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
J6-11 (B) - Body ground	B - Body ground	Battery power supply	Always	11 to 14 V
J6-12 (GND) - 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
J6-17 (LIN1) - Body ground	P - Body ground	LIN communication line	Ignition switch ON	Pulse generation
J6-16 (LIN2) - Body ground	R - Body ground	LIN communication line	Ignition switch ON	Pulse generation

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.

HINT:

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

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

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F1-13 (LIN) - Body ground	B - Body ground	LIN communication line	Ignition switch ON	Pulse generation

CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) (w/ Smart Key System)

(a) Disconnect the F78 steering lock ECU (steering lock actuator or upper bracket assembly) connector.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F78-1 (GND) - Body ground	W-B Body ground	Ground	Always	Below 1 Ω
F78-7 (B) - Body ground	L - Body ground	Battery power supply	Always	11 to 14 V

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F78-5 (LIN) - Body ground	V - Body ground	LIN communication line	Ignition switch ON	Pulse generation

CHECK ID CODE BOX (IMMOBILISER CODE ECU) (w/ Smart Key System)

(a) Disconnect the F21 ID code box (immobiliser code ECU) connector.

(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 connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F21-5 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
F21-1 (+B) - Body ground	W - Body ground	+B power supply	Always	11 to 14 V

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F21-2 (LIN1) - Body ground	B - Body ground	LIN communication line	Ignition switch ON	Pulse generation

CHECK DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY (w/ Double Locking System)

(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.

HINT:

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F14-12 (+B) - Body ground	BE - Body ground	Battery power supply	Always	11 to 14 V
F14-11 (CPUB) - Body ground	SB - Body ground	Battery power supply	Always	11 to 14 V
F14-7 (GND) - Body ground	LA - 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
F14-9 (LIN) - Body ground	P - Body ground	LIN communication line	Double lock unset	Pulse generation

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the LIN communication system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROU ...

Diagnosis System

DIAGNOSIS SYSTEM DESCRIPTION The main body ECU (multiplex network body ECU) and certification ECU (smart key ECU assembly) control the LIN communication system. LIN communication system data and ...

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