Terminals Of Ecu

Fig 1: Identifying ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the F28 and F30 display connectors.
2. Measure the resistance and voltage according to the value(s) in the table below.
   VOLTAGE SPECIFICATION
   
   

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   F28-1 (+B1) - F28-10 (GND1)	R - W-B	Battery	Always	10.5 to 16 V
   F28-2 (ACC) - F28-10 (GND1)	GR - W-B	Accessory (ON)	Engine switch off	Below 1 V
   			Engine switch on (ACC)	10.5 to 16 V
   F28-3 (IG) - F28-10 (GND1)	G - W-B	Ignition (ON)	Engine switch off	Below 1 V
   			Engine switch on (IG)	10.5 to 16 V
   F28-10 (GND1) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   F30-6 (GND2) - Body ground	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.

3. Reconnect the F28 and F30 display connectors.
4. Measure the voltage and waveform according to the value(s) in the table below.
   VOLTAGE SPECIFICATION
   
   

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   F30-1 (TX-) - F28-10 (GND1)	L - W-B	AVC-LAN communication signal	Engine switch on (ACC)	2.25 to 2.75 V
   F30-2 (TX+) - F28-10 (GND1)	W - W-B	AVC-LAN communication signal	Engine switch on (ACC)	2.25 to 2.75 V
   F27-3 (TX2-) - F28-10 (GND1)	L - W-B	AVC-LAN communication signal	Engine switch on (ACC)	2.25 to 2.75 V
   F27-4 (TX2+) - F28-10 (GND1)	W - W-B	AVC-LAN communication signal	Engine switch on (ACC)	2.25 to 2.75 V
   F27-5 (TSW-) - F28-10 (GND1)	BR - W-B	Telephone relation switch signal	Always	Below 1 V
   F27-9 (MACC) - F28-10 (GND1)	Y - W-B	Microphone amplifier power supply	Engine switch off	Below 1 V
   			Engine switch on (IG)	4.75 to 5.25 V
   F27-10 (MIN-) - F28-10 (GND1)	R - W-B	Microphone voice signal	See "Microphone & Voice Recognition Check" (See OPERATION CHECK  )	-
   F27-11 (MIN+) - F28-10 (GND1)	G - W-B	Microphone voice signal	See "Microphone & Voice Recognition Check" (See OPERATION CHECK  )	-
   F27-12 (SGND) - F28-10 (GND1)	BR - W-B	Signal ground	Always	Below 1 V
   F27-13 (CA+) - F28-10 (GND1)*1	B - W-B	Television camera power supply	Engine switch on (IG), shift lever moved to R	5.7 to 6.5 V
   F27-14 (CGND) - Body ground*1	W - Body ground	Ground	Always	Below 1 V
   F27-21 (IVO-) - F28-10 (GND1)	B - W-B	Voice guidance signal	Voice guidance provided	Waveform synchronized with sounds is output
   F27-22 (IVO+) - F27-10 (GND1)	W - W-B	Voice guidance signal	Voice guidance provided	Waveform synchronized with sounds is output
   F27-23 (SLD) - F28-10 (GND1)	Shielded - W-B	Shielded ground	Always	Below 1 V
   F27-27 (V+) - F27-14 (CGND)*1	R-W	Television camera image signal	Engine switch on (IG), shift lever moved to R	Pulse generation (refer to WAVEFORM 1 )
   F27-28 (V-) - F27-14 (CGND)*1	Shielded - W	Shielded ground	Always	Below 1 V
   F28-5 (HILL) - F28-10 (GND1)	W - W-B	Illumination signal	Light control switch off	Below 1 V
   			Light control switch on	10.5 to 16 V
   F28-7 (TC) - F28-10 (GND1)	V - W-B	Diagnosis ON signal	Engine switch on (IG)	9 to 14 V
   F28-8 (HAZ) - F28-10 (GND1)	O - W-B	Hazard warning signal	Hazard warning switch off	Below 1 V
   			Hazard warning switch on	11 to 14 V
   F28-9 (ARON) - F28-10 (GND1)	W - W-B	Front passenger side airbag ON/OFF indicator signal	Passenger airbag ON/OFF indicator off	Below 2 V
   			Passenger airbag ON/OFF indicator on	11 to 14 V
   F28-12 (ILL+) - F28-10 (GND1)	G - W-B	Illumination signal	Light control switch off	Below 1 V
   			Light control switch on	10.5 to 16 V
   F28-13 (REV) - F28-10 (GND1)	L - W-B	Reverse signal	See "Vehicle Signal Check" Mode (See OPERATION CHECK  )	-
   F28-14 (SPD) - F28-10 (GND1)	V - W-B	Speed signal from combination meter	See "Vehicle Signal Check" Mode (See OPERATION CHECK  )	-
   F28-19 (SEUC) - F28-10 (GND1)	V - W-B	Security indicator signal	Security indicator illuminates (illuminates only for 60 seconds in alarm sounding state and is blinking when system in alarm state)	10.5 to 16 V
   F28-20 (AIR) - F28-10 (GND1)	B - W-B	Front passenger side airbag ON/OFF indicator signal	Passenger airbag ON/OFF indicator off	Below 2 V
   			Passenger airbag ON/OFF indicator on	10.5 to 16 V
   F28-21 (PBEW) - F28-10 (GND1)	Y - W-B	Passenger seat belt signal	Passenger seat occupied, seat belt fastened	11 to 14 V
   			Passenger seat occupied, seat belt unfastened	Below 2 V
   F28-23 (PKB) - F28-10 (GND1)	Y - W-B	Parking brake signal	See "Vehicle Signal Check" Mode (See OPERATION CHECK  )	-
   F29-1 (W+) - F28-10 (GND1)	W - W-B	DVD image signal	DVD played on radio receiver	Pulse generation (refer to WAVEFORM 2 )
   F29-4 (W-) - F28-10 (GND1)	B - W-B	Signal ground	Always	Below 1 V
   F30-1 (TX4-) - F28-10 (GND1)	L - W-B	AVC-LAN communication signal	Engine switch on (ACC)	2.25 to 2.75 V
   F30-2 (TX4+) - F28-10 (GND1)	W - W-B	AVC-LAN communication signal	Engine switch on (ACC)	2.25 to 2.75 V
   F30-3 (SGND) - F28-10 (GND1)	Shielded - W-B	Shielded ground	Always	Below 1 V
   F30-4 (MCO-) - F28-10 (GND1)	W - W-B	Microphone voice signal	See "Microphone & Voice Recognition Check" (See OPERATION CHECK  )	-
   F30-5 (MCO+) - F28-10 (GND1)	B - W-B	Microphone voice signal	See "Microphone & Voice Recognition Check" (See OPERATION CHECK  )	-
   F30-7 (ACC2) - F28-10 (GND1)	GR - W-B	Accessory (ON)	Engine switch off	Below 1 V
   			Engine switch on (ACC)	10.5 to 16 V
   F30-10 (SI-) - F28-10 (GND1)	W - W-B	Voice guidance signal	Voice guidance provided	Waveform synchronized with sounds is input
   F30-11 (SI+) - F28-10 (GND1)	B - W-B	Voice guidance signal	Voice guidance provided	Waveform synchronized with sounds is input
   F30-15 (REV2) - F28-10 (GND1)	L - W-B	Reverse signal	See "Vehicle Sensors" Mode (See OPERATION CHECK  )	-
   F30-16 (SPD2) - F28-10 (GND1)	V - W-B	Speed signal	See "Vehicle Sensors" Mode (See OPERATION CHECK  )	-
   F31-2 (TEC+) - F28-10 (GND1)	R - W-B	Temperature up switch signal	Switch not pressed	Below 1 V
   			Switch pressed	Alternating between 3.5 V or higher and below 1 V
   F31-3 (TES+) - F28-10 (GND1)	L - W-B	Temperature up switch signal	Switch not pressed	Below 1 V
   			Switch pressed	Alternating between 3.5 V or higher and below 1 V
   F31-5 (AGND) - F28-10 (GND1)	B - N-B	Signal ground	Always	Below 1 Ω
   F31-6 (TEC-) - F28-10 (GND1)	G - W-B	Temperature down switch signal	Switch not pressed	Below 1 V
   			Switch pressed	Alternating between 3.5 V or higher and below 1 V
   F31-7 (TES-) - F28-10 (GND1)	W - W-B	Temperature down switch signal	Switch not pressed	Below 1 V
   			Switch pressed	Alternating between 3.5 V or higher and below 1 V
   F31-8 (BGND) - F28-10 (GND1)	GR - W-B	Signal ground	Always	Below 1 Ω
   F37-1 (GVIF) - F28-10 (GND1)*2	B - W-B	Digital image signal	Navigation display ON	-
   HINT: *1: w/Rear View Monitor System *2: w/Rear Seat Entertainment System

   If the result is not as specified, the multi-display may have a malfunction.

5. Using an oscilloscope, check waveform 1.

   Waveform 1 (reference) 

   WAVEFORM REFERENCE
   
   

   Item	Content
   Terminal No. (Symbol)	F27-27 (V+) - F27-14 (CGND)
   Tool Setting	0.2 V/DIV., 0.2 s/DIV.
   Condition	Engine switch on (IG), shift lever moved to R

   Fig 2: Identifying Waveform 1

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Using an oscilloscope, check waveform 2.

   Waveform 2 (reference) 

Fig 3: Identifying Waveform 2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Identifying Navigation ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the F32 ECU connector.
2. Measure the resistance and voltage according to the value(s) in the table below.
   VOLTAGE AND RESISTANCE REFERENCE
   
   

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   F32-1 (+B) - F32-15 (GND1)	L - B	Battery	Always	11 to 14 V
   F32-13 (ACC) - F32-15 (GND1)	GR - B	Accessory (ON)	Engine switch off	Below 1 V
   			Engine switch on (ACC)	11 to 14 V
   F32-15 (GND1) - Body ground	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.

3. Reconnect the F32 ECU connector.
4. Measure the voltage according to the value(s) in the table below.

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