RM3660EC _53 Suspension _080780 TIRE PRESSURE MONITORING _0592791 TIRE PRESSURE WARNING SYSTEM(for Gasoline Model (for Type B)) U

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


CHECK TIRE PRESSURE WARNING ECU AND RECEIVER


C436222C29
2.167,0.417 2.583,0.667 0.417,0.25 2.167,0.781 2.583,1.031 0.417,0.25 2.167,1.125 2.583,1.375 0.417,0.25 2.208,0.813 2.552,1 0.344,0.188 10 false O161 0.156,0.135 0.469,0.333 0.313,0.198 10 false *a 2.229,0.458 2.688,0.656 0.458,0.198 10 false O18 2.625,0.479 2.938,0.677 0.313,0.198 10 false *1 2.635,0.823 2.948,1.021 0.313,0.198 10 false *2 2.208,1.167 2.823,1.365 0.615,0.198 10 false O192 2.635,1.146 2.948,1.344 0.313,0.198 10 false *3
*1 w/ Smart Entry and Start System (for M20C-FKS) *2 w/ Smart Entry and Start System (except M20C-FKS)
*3 w/o Smart Entry and Start System - -
*a Front view of wire harness connector
(to Tire Pressure Warning ECU and Receiver) 		- -


a.

Disconnect the O18*1, O161*2 or O192*3 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 (for M20C-FKS)

*2: w/ Smart Entry and Start System (except M20C-FKS)

*3: w/o Smart Entry and Start System


w/ Smart Entry and Start System (for M20C-FKS)
Terminal No. (Symbol) Terminal Description Condition Specified Condition
O18-1 (IGR) - O18-12 (GND) IG power source Ignition switch ON 10 to 16 V
O18-7 (+B) - O18-12 (GND) Power supply (from battery) Always 10 to 16 V
O18-9 (CANH) - O18-10 (CANL) CAN communication line Ignition switch off 54 to 69 Ω
O18-12 (GND) - Body ground Ground Always Below 1 Ω

w/ Smart Entry and Start System (except M20C-FKS)
Terminal No. (Symbol) Terminal Description Condition Specified Condition
O161-1 (IGR) - O161-12 (GND) IG power source Ignition switch ON 10 to 16 V
O161-7 (+B) - O161-12 (GND) Power supply (from battery) Always 10 to 16 V
O161-9 (CANH) - O161-10 (CANL) CAN communication line Ignition switch off 54 to 69 Ω
O161-12 (GND) - Body ground Ground Always Below 1 Ω

w/o Smart Entry and Start System
Terminal No. (Symbol) Terminal Description Condition Specified Condition
O192-1 (IGR) - O192-12 (GND) IG power source Ignition switch ON 10 to 16 V
O192-7 (+B) - O192-12 (GND) Power supply (from battery) Always 10 to 16 V
O192-9 (CANH) - O192-10 (CANL) CAN communication line Ignition switch off 54 to 69 Ω
O192-12 (GND) - Body ground Ground Always Below 1 Ω


b.

w/o Smart Entry and Start System:

Connect the O192 tire pressure warning ECU and receiver connector and 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.


C484065C11
1.969,0.76 2.51,0.99 0.542,0.229 0.188,0.135 0.5,0.333 0.313,0.198 10 false *a 2.052,0.792 2.458,0.948 0.406,0.156 10 false O192
*a Component with harness connected
(Tire Pressure Warning ECU and Receiver) 		- -


Terminal No. (Symbol) Terminal Description Condition Specified Condition
O192-4 (RDA) - O192-12 (GND) Output signals Ignition switch ON Pulse generation (see waveform 1)
O192-5 (PRG) - O192-12 (GND) Input signals Ignition switch ON Pulse generation (see waveform 1)


c.
C240058C03
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.

Item Contents
Terminal O192-4 (RDA) - O192-12 (GND)
O192-5 (PRG) - O192-12 (GND)
Tool setting 5 V/DIV, 5 ms./DIV.
Vehicle condition Ignition switch ON

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.