RM3660EC _53 Suspension _080780 TIRE PRESSURE MONITORING _0393955 TIRE PRESSURE WARNING SYSTEM(for Gasoline Model (for Type A)) U

TIRE PRESSURE MONITORING TIRE PRESSURE WARNING SYSTEM(for Gasoline Model (for Type A)) TERMINALS OF ECU

CHECK TIRE PRESSURE WARNING ECU AND RECEIVER

0.208,0.844 0.615,1.073 0.406,0.229 0.208,1.198 0.615,1.427 0.406,0.229 0.115,0.115 0.427,0.313 0.313,0.198 10 false *a 0.271,0.865 0.729,1.063 0.458,0.198 10 false O18 0.25,1.229 0.708,1.427 0.458,0.198 10 false O124 0.688,0.875 1,1.073 0.313,0.198 10 false *A 0.688,1.219 1,1.417 0.313,0.198 10 false *B

*A	w/ Smart Entry and Start System
*B	w/o Smart Entry and Start System
*a	Front view of wire harness connector (to Tire Pressure Warning ECU and Receiver)

Disconnect the O18*1, O124*2 tire pressure warning ECU and receiver connector and measure the voltage or resistance on the wire harness side.

*1: w/ Smart Entry and Start System

*2: w/o Smart Entry and Start System

w/ Smart Entry and Start System
Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
O18-1 (IG) - O18-12 (GND)	SB - W-B	IG power source	Ignition switch ON	10 to 16 V
O18-7 (+B) - O18-12 (GND)	BR - W-B	Power supply (from battery)	Always	10 to 16 V
O18-9 (CANH) - O18-10 (CANL)	L - W	CAN communication line	Ignition switch off	54 to 69 Ω
O18-12 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

w/o Smart Entry and Start System
Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
O124-1 (IG) - O124-12 (GND)	SB - W-B	IG power source	Ignition switch ON	10 to 16 V
O124-7 (+B) - O124-12 (GND)	P - W-B	Power supply (from battery)	Always	10 to 16 V
O124-9 (CANH) - O124-10 (CANL)	L - W	CAN communication line	Ignition switch off	54 to 69 Ω
O124-12 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

Connect the O18*1 or O124*2 tire pressure warning ECU and receiver connector.

*1: w/ Smart Entry and Start System

*2: w/o Smart Entry and Start System

Measure the voltage according to the value(s) in the table below. If the result is not as specified, the ECU may be malfunctioning.

HINT:: Measure the values on the wire harness side while the connector is connected.

1.927,0.927 2.333,1.135 0.406,0.208 1.927,0.646 2.333,0.854 0.406,0.208 0.115,0.094 0.438,0.344 0.323,0.25 10 false *a 1.99,0.677 2.281,0.875 0.292,0.198 10 false O18 1.958,0.958 2.354,1.146 0.396,0.188 10 false O124 2.396,0.677 2.688,0.875 0.292,0.198 10 false *A 2.406,0.938 2.698,1.135 0.292,0.198 10 false *B

*A	w/ Smart Entry and Start System	*B	w/o Smart Entry and Start System
*a	Component with harness connected (Tire Pressure Warning ECU and Receiver)	-	-

w/ Smart Entry and Start System
Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
O18-3 (CLSW) - O18-12 (GND)	B - W-B	Tire pressure warning reset switch	· Ignition switch ON · Steering pad switch assembly operated, "Set Pressure" selected on the multi-information display and "OK" switch (steering pad switch assembly) pressed and held	Below 1.5 V
O18-3 (CLSW) - O18-12 (GND)	B - W-B	Tire pressure warning reset switch	· Ignition switch ON · "OK" switch (steering pad switch assembly) off	8 to 15 V
O18-4 (RDA) - O18-12 (GND)	LG - W-B	Output signals	Ignition switch ON	Pulse generation (see waveform 1)
O18-5 (PRG) - O18-12 (GND)	GR - W-B	Input signals	Ignition switch ON	Pulse generation (see waveform 1)

w/o Smart Entry and Start System
Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
O124-3 (CLSW) - O124-12 (GND)	B - W-B	Tire pressure warning reset switch	· Ignition switch ON · Steering pad switch assembly operated, "Set Pressure" selected on the multi-information display and "OK" switch (steering pad switch assembly) pressed and held	Below 1.5 V
O124-3 (CLSW) - O124-12 (GND)	B - W-B	Tire pressure warning reset switch	· Ignition switch ON · "OK" switch (steering pad switch assembly) off	8 to 15 V
O124-4 (RDA) - O124-12 (GND)	LG - W-B	Output signals	Ignition switch ON	Pulse generation (see waveform 1)
O124-5 (PRG) - O124-12 (GND)	GR - W-B	Input signals	Ignition switch ON	Pulse generation (see waveform 1)

2.875,1.229 3.115,1.438 0.24,0.208 10 false *b 0.115,0.104 0.323,0.323 0.208,0.219 10 false *a

*a	Example
*b	GND

Using an oscilloscope, check waveform 1.

Waveform 1:
Item	Contents
Terminal	O18-4 (RDA) - O18-12 (GND)1 O124-4 (RDA) - O124-12 (GND)2 O18-5 (PRG) - O18-12 (GND)1 O124-5 (PRG) - O124-12 (GND)2
Tool setting	5 V/DIV, 5 ms./DIV.
Vehicle condition	Ignition switch ON

*1: w/ Smart Entry and Start System

*2: w/o Smart Entry and Start System

HINT:: The waveform shown in the illustration is an example. If the tester displays a waveform that alternates between high and low, where high is a voltage that is between the IG power source voltage and a voltage 2.2 V lower than the IG power source voltage, and where low is a voltage of between 0 and 1.2 V, the ECU can be judged normal.