Toyota Venza: Terminals Of Ecu

Toyota Venza Service Manual / Lighting (ext) / Lighting System / Terminals Of Ecu

TERMINALS OF ECU

1. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the 2A and 2F main body ECU (driver side junction block assembly) connectors.

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

Standard Voltage

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
2A-1 - Body ground	B - Body ground	Battery power supply	Always	11 to 14 V

Standard Resistance

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
2F-16 - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.

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

Standard Resistance

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D49-18 (CLTE) - Body ground	Y - Body ground	Automatic light control ground	Always	Below 1 Ω

Standard Voltage

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
2C-7 (PKB) - Body ground	G - Body ground	Parking brake switch input	Parking brake switch on	Below 1 V
2C-7 (PKB) - Body ground	G - Body ground	Parking brake switch input	Parking brake switch off	Pulse generation
2C-23 (DIM) - Body ground	GR - Body ground	High beam headlight drive output	Dimmer switch in high or high flash position	Below 1 V
2C-23 (DIM) - Body ground	GR - Body ground	High beam headlight drive output	Dimmer switch in low position	Pulse generation
2F-5 (LSR) - Body ground	Y - Body ground	Rear door unlock detection switch LH or RH input	Rear door LH and RH locked	Pulse generation
2F-5 (LSR) - Body ground	Y - Body ground	Rear door unlock detection switch LH or RH input	Rear door LH or RH unlocked	Below 1 V
2G-35 (HRLY) - Body ground	GR - Body ground	Headlight relay drive output	Light control switch in head position	Below 1 V
2G-35 (HRLY) - Body ground	GR - Body ground	Headlight relay drive output	Light control switch not in head position	11 to 14 V
2N-2 (HU) - Body ground	G - Body ground	Dimmer switch high position signal input	Dimmer switch in high or high flash position	Below 1 V
2N-2 (HU) - Body ground	G - Body ground	Dimmer switch high position signal input	Dimmer switch in low position	Pulse generation
2O-5 (LSR) - Body ground	BR - Body ground	Rear door unlock detection switch LH or RH input	Rear door LH and RH locked	Pulse generation
2O-5 (LSR) - Body ground	BR - Body ground	Rear door unlock detection switch LH or RH input	Rear door LH or RH unlocked	Below 1 V
2O-19 (LCTY) - Body ground	R - Body ground	Rear door courtesy light switch LH input	Rear door LH open	Below 1 V
2O-19 (LCTY) - Body ground	R - Body ground	Rear door courtesy light switch LH input	Rear door LH closed	Pulse generation
D49-3 (MILE)*1 - Body ground	LG - Body ground	Door mirror foot light drive output	Door mirror foot light off	Below 1 V
D49-3 (MILE)*1 - Body ground	LG - Body ground	Door mirror foot light drive output	Door mirror foot light on	11 to 14 V
D49-7 (RCTY) - Body ground	GR - Body ground	Rear door courtesy light switch RH input	Rear door RH open	Below 1 V
D49-7 (RCTY) - Body ground	GR - Body ground	Rear door courtesy light switch RH input	Rear door RH closed	Pulse generation
D49-17 (HEAD) - Body ground	V - Body ground	Light control switch head position input	Light control switch in head position	Below 1 V
D49-17 (HEAD) - Body ground	V - Body ground	Light control switch head position input	Light control switch not in head position	Pulse generation
D49-19 (CLTS) - Body ground	V - Body ground	Automatic light control sensor signal input	Ignition switch off	Below 1 V
D49-19 (CLTS) - Body ground	V - Body ground	Automatic light control sensor signal input	Automatic light control system operates	Pulse generation (See waveform 1)
D49-20 (CLTB) - Body ground	GR - Body ground	Automatic light control sensor power supply output	Ignition switch off	Below 1 V
D49-20 (CLTB) - Body ground	GR - Body ground	Automatic light control sensor power supply output	Ignition switch ON and light control switch in AUTO position	11 to 14 V
D49-21 (PCTY) - Body ground	V - Body ground	Front passenger side door courtesy light switch input	Front passenger side door open	Below 1 V
D49-21 (PCTY) - Body ground	V - Body ground	Front passenger side door courtesy light switch input	Front passenger side door closed	Pulse generation
D49-25 (BCTY) - Body ground	GR - Body ground	Back door courtesy switch input	Back door open	Below 1 V
D49-25 (BCTY) - Body ground	GR - Body ground	Back door courtesy switch input	Back door closed	11 to 14 V
D49-27 (LSWP) - Body ground	P - Body ground	Front passenger side door unlock detection switch input	Front passenger side door locked	Pulse generation
D49-27 (LSWP) - Body ground	P - Body ground	Front passenger side door unlock detection switch input	Front passenger side door unlocked	Below 1 V
D49-28 (FFOG) - Body ground	R - Body ground	Front fog light switch input	Front fog light switch on	Below 1 V
D49-28 (FFOG) - Body ground	R - Body ground	Front fog light switch input	Front fog light switch off	Pulse generation
D50-4 (FFGO) - Body ground	GR - Body ground	Front fog light relay drive output	Light control switch in head position and front fog light switch on	Below 1 V
D50-4 (FFGO) - Body ground	GR - Body ground	Front fog light relay drive output	Front fog light switch off	11 to 14 V
D50-9 (LSWD) - Body ground	P - Body ground	Driver side door unlock detection switch input	Driver side door locked	Pulse generation
D50-9 (LSWD) - Body ground	P - Body ground	Driver side door unlock detection switch input	Driver side door unlocked	Below 1 V
D50-13 (HF) - Body ground	SB - Body ground	Dimmer switch high flash position signal input	Dimmer switch in high flash position	Below 1 V
D50-13 (HF) - Body ground	SB - Body ground	Dimmer switch high flash position signal input	Dimmer switch not in high flash position	Pulse generation
D50-21 (A) - Body ground	BR - Body ground	Light control switch AUTO position signal input	Light control switch in AUTO position	Below 1 V
D50-21 (A) - Body ground	BR - Body ground	Light control switch AUTO position signal input	Light control switch not in AUTO position	Pulse generation
D50-23 (TAIL) - Body ground	R - Body ground	Light control switch tail position signal input	Light control switch in tail or head position	Below 1 V
D50-23 (TAIL) - Body ground	R - Body ground	Light control switch tail position signal input	Light control switch in neither tail nor head position	Pulse generation
D50-24 (DCTY) - Body ground	V - Body ground	Driver side door courtesy light switch input	Driver side door open	Below 1 V
D50-24 (DCTY) - Body ground	V - Body ground	Driver side door courtesy light switch input	Driver side door closed	Pulse generation
D51-10 (DRL) - Body ground	G - Body ground	Daytime running light system drive output	Daytime running light system operating	Below 1 V
D51-10 (DRL) - Body ground	G - Body ground	Daytime running light system drive output	Daytime running light system not operating	11 to 14 V

*1: w/o Seat Position Memory

If the result is not as specified, the main body ECU (Driver side junction block assembly) may have a malfunction.

(1) Waveform 1

Item	Content
Tool setting	5 V/DIV., 5 ms./DIV.

HINT:

If the ambient light becomes brighter, width A becomes narrower.

2. CHECK HEADLIGHT LEVELING ECU ASSEMBLY

(a) Disconnect the A40 headlight leveling ECU assembly connector.

(b) Measure the voltage and resistance between the specified terminals of the wire harness side connectors and body ground.

Standard Voltage

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A40-1 (IG) - Body ground	L - Body ground	IG power supply	Ignition switch off	Below 1 V
A40-1 (IG) - Body ground	L - Body ground	IG power supply	Ignition switch ON	11 to 14 V

Standard Resistance

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A40-9 (E1) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.

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

Standard Resistance

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A40-21 (SGR) - Body ground	LG - Body ground	Rear height control sensor ground	Always	Below 1 Ω
A40-23 (RH-) - Body ground	Y - Body ground	Leveling motor RH ground	Always	Below 1 Ω
A40-24 (LH-) - Body ground	R - Body ground	Leveling motor LH ground	Always	Below 1 Ω

Standard Voltage

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A40-3 (B2) - Body ground	LG - Body ground	Low beam headlight signal input	Low beam headlights on	Below 1.5 V
A40-3 (B2) - Body ground	LG - Body ground	Low beam headlight signal input	Low beam headlights off	Above 5 V
A40-15 (PRST) - Body ground	Y - Body ground	Initialization signal input	Terminal LVL and terminal GND of DLC3 connected	Below 1 V
A40-15 (PRST) - Body ground	Y - Body ground	Initialization signal input	Terminal LVL and terminal GND of DLC3 not connected	Approx. 5 V
A40-6 (WNG) - Body ground	BR - Body ground	Indicator light drive output	Indicator light on	11 to 14 V
A40-6 (WNG) - Body ground	BR - Body ground	Indicator light drive output	Indicator light off	Below 1 V
A40-10 (RH+) - Body ground	R - Body ground	Leveling motor RH power supply	Ignition switch off	Below 1 V
A40-10 (RH+) - Body ground	R - Body ground	Leveling motor RH power supply	Ignition switch ON	10 to 16 V
A40-11 (LH+) - Body ground	P - Body ground	Leveling motor LH power supply	Ignition switch off	Below 1 V
A40-11 (LH+) - Body ground	P - Body ground	Leveling motor LH power supply	Ignition switch ON	10 to 16 V
A40-12 (SBR) - Body ground	BR - Body ground	Rear height control sensor power supply	Ignition switch off	Below 1 V
A40-12 (SBR) - Body ground	BR - Body ground	Rear height control sensor power supply	Ignition switch ON	4.75 to 5.25 V
A40-16 (SPDR) - Body ground	GR - Body ground	Vehicle speed signal input	Vehicle is driven at approx. 20 km/h (12mph)	Pulse generation (See waveform 1)
A40-17 (RHT) - Body ground	G - Body ground	Leveling motor RH operation signal input	With low beam headlights on, vehicle height not changed	Below 1 V
A40-17 (RHT) - Body ground	G - Body ground	Leveling motor RH operation signal input	With low beam headlights on, change vehicle height and keep for more than 3 seconds.	1.0 to 14.4 V
A40-18 (LHT) - Body ground	V - Body ground	Leveling motor LH operation signal input	With low beam headlights on, vehicle height not changed	Below 1 V
A40-18 (LHT) - Body ground	V - Body ground	Leveling motor LH operation signal input	With low beam headlights on, change vehicle height and keep for more than 3 seconds.	1.0 to 14.4 V
A40-19 (SHRL) - Body ground	BE - Body ground	Rear height control sensor signal input	Ignition switch off	Below 1 V
A40-19 (SHRL) - Body ground	BE - Body ground	Rear height control sensor signal input	Ignition switch ON	0.5 to 4.5 V

If the result is not as specified, the headlight leveling ECU assembly may have a malfunction.

(1) Waveform 1

Item	Content
Tool setting	2 V/DIV., 2 ms./DIV.

3. CHECK AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) (w/ Automatic High Beam System)

(a) Disconnect the D44 AFS ECU (headlight swivel ECU assembly) connector.

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

Standard Resistance

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D44-22 (E1) - Body ground	B - Body ground	AFS ECU (headlight swivel ECU assembly) ground	Always	Below 1 Ω

Standard Voltage

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D44-15 (IG) - Body ground	G - Body ground	AFS ECU (headlight swivel ECU assembly) power supply	Ignition switch off	Below 1 V
D44-15 (IG) - Body ground	G - Body ground	AFS ECU (headlight swivel ECU assembly) power supply	Ignition switch ON	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

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

Standard Voltage

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D44-7 (MPX2) - D44-22 (E1)	V - B	Operation check signal	Ignition switch ON, terminal LVL and GND of DLC3 connected	Below 1 V
D44-7 (MPX2) - D44-22 (E1)	V - B	Operation check signal	Ignition switch ON, terminal LVL and GND of DLC3 not connected	Approx. 5 V
D44-10 (SMR) - D44-22 (E1)	R - B	LIN communication	Ignition switch off	Below 1 V
D44-10 (SMR) - D44-22 (E1)	R - B	LIN communication	Ignition switch ON, inner rear view mirror connector disconnected	Pulse generation (See waveform 1)
D44-12 (CANH) - D44-22 (E1)	Y - B	CAN communication	Ignition switch off	Below 1 V
D44-12 (CANH) - D44-22 (E1)	Y - B	CAN communication	Ignition switch ON	Pulse generation
D44-13 (CANL) - D44-22 (E1)	W - B	CAN communication	Ignition switch off	Below 1 V
D44-13 (CANL) - D44-22 (E1)	W - B	CAN communication	Ignition switch ON	Pulse generation

If the result is not as specified, the ECU may have a malfunction.

(1) Waveform 1

Item	Content
Tool setting	2 V/DIV., 20 ms./DIV.

4. CHECK INNER REAR VIEW MIRROR ASSEMBLY

(a) Disconnect the P12 inner rear view mirror assembly connector.

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

Standard Resistance

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
P12-2 (E)*1 - Body ground	W-B - Body ground	Inner rear view mirror assembly ground	Always	Below 1 Ω

Standard Voltage

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
P12-1 (IG)*1 - Body ground	Y - Body ground	Inner rear view mirror assembly power supply	Ignition switch off	Below 1 V
P12-1 (IG)*1 - Body ground	Y - Body ground	Inner rear view mirror assembly power supply	Ignition switch ON	11 to 14 V

*1: Automatic Glare-resistant EC Mirror

If the result is not as specified, there may be a malfunction on the wire harness side.

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

Standard Voltage

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
P12-3 (LIN)*2 - P12-2 (E)	R - W-B	LIN communication	Ignition switch off	Below 1 V
Automatic high beam system operates	Pulse generation (See waveform 1)

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

P12-3 (LIN)*2 - P12-2 (E)

R - W-B

LIN communication

Ignition switch off

Below 1 V

Automatic high beam system operates

Pulse generation

(See waveform 1)

*2: w/ Automatic High Beam System

If the result is not as specified, the inner rear view mirror assembly may have a malfunction.

(1) Waveform 1

Item	Content
Tool setting	2 V/DIV., 20 ms./DIV.

5. CHECK OUTER MIRROR CONTROL ECU ASSEMBLY LH (w/ Seat Position Memory)

(a) Disconnect the I13 outer mirror control ECU assembly LH connector.

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

HINT:

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

Standard Voltage

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
I13-14 (BDR) - Body ground	V - Body ground	Battery power supply	Ignition switch off	11 to 14 V
I13-6 (CPUB) - Body ground	LG - Body ground	Battery power supply	Ignition switch off	11 to 14 V
I13-5 (SIG) - Body ground	L - Body ground	Ignition power supply	Ignition switch ON	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

HINT:

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

Standard Resistance

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
I13-7 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.

(d) Reconnect the I13 outer mirror control ECU assembly LH connector.

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

Standard Voltage

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
I12-2 (LP) - I12-12 (HTR-)	SB - V	Door mirror foot light (LH) drive output	Door mirror foot light off	Below 1 V
I12-2 (LP) - I12-12 (HTR-)	SB - V	Door mirror foot light (LH) drive output	Door mirror foot light on	11 to 14 V

6. CHECK OUTER MIRROR CONTROL ECU ASSEMBLY RH (w/ Seat Position Memory)

(a) Disconnect the H13 outer mirror control ECU assembly RH connector.

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

HINT:

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

Standard Voltage

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
H13-14 (BDR) - Body ground	R - Body ground	Battery power supply	Ignition switch off	11 to 14 V
H13-6 (CPUB) - Body ground	B - Body ground	Battery power supply	Ignition switch off	11 to 14 V
H13-5 (SIG) - Body ground	L - Body ground	Ignition power supply	Ignition switch ON	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

HINT:

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

Standard Resistance

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
H13-7 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.

(d) Reconnect the H13 outer mirror control ECU assembly RH connector.

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

Standard Voltage

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
H12-2 (LP) - H12-12 (HTR-)	SB - V	Door mirror foot light (RH) drive output	Door mirror foot light off	Below 1 V
H12-2 (LP) - H12-12 (HTR-)	SB - V	Door mirror foot light (RH) drive output	Door mirror foot light on	11 to 14 V

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