TERMINALS OF ECU
CHECK TIRE PRESSURE WARNING ECU AND RECEIVER
(a) Disconnect the M23 tire pressure warning ECU and receiver connector and measure the voltage or resistance on the wire harness side.
*a |
Front view of wire harness connector (to Tire Pressure Warning ECU and Receiver) |
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
M23-1 (IG) - M23-12 (GND) |
SB - W-B |
IG power source |
Ignition switch to ON |
10 to 16 V |
M23-7 (+B) - M23-12 (GND) |
R - W-B (*1) B - W-B (*2) |
Power supply (from battery) |
Always |
10 to 16 V |
M23-12 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
(b) Connect the M23 tire pressure warning ECU and receiver connector.
(c) Measure the voltage and resistance 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.
*a |
Component with harness connected (Tire Pressure Warning ECU and Receiver) |
- |
- |
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
M23-3 (CLSW) - M23-12 (GND) |
Y - W-B |
Tire pressure warning reset switch |
|
Below 1.5 V |
|
8 to 15 V |
|||
M23-4 (RDA) - M23-12 (GND) |
G - W-B |
Output signals |
Ignition switch to ON |
Pulse generation (see waveform 1) |
M23-5 (PRG) - M23-12 (GND) |
W - W-B |
Input signals |
Ignition switch to ON |
Pulse generation (see waveform 1) |
(d) Using an oscilloscope, check waveform 1.
*a |
Example |
*b |
GND |
Item |
Contents |
---|---|
Terminal |
M23-4 (RDA) - M23-12 (GND) M23-5 (PRG) - M23-12 (GND) |
Tool setting |
5 V/DIV, 5 ms./DIV. |
Vehicle condition |
Ignition switch to 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.
Toyota CH-R Service Manual > Navigation System: Satellite Radio Broadcast cannot be Selected or After Selecting Broadcast, Broadcast
cannot be Added into Memory
CAUTION / NOTICE / HINT
NOTICE:
Some satellite radio broadcasts require payment. A contract must be made between
a satellite radio company and the user. If the contract expires, it will not be
possible to listen to the broadcast.
PROCEDURE
1.
CHECK SATELLITE RADIO
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Toyota CH-R Service Manual > Audio And Visual System(for Radio Receiver Type): Terminals Of Ecu
TERMINALS OF ECU
Terminal No. (Symbol)
Wiring Color
Terminal Description
Condition
Specified Condition
F47-4 (MACC) - F48-7 (GND1)
B - LA
Microphone power supply
Ignition switch off
...