- Power switch on (IG)
- Steering pad switch assembly operated, "Set Pressure" selected on the multi-information display and "OK" switch (steering pad switch assembly) pressed and held
| Last Modified: 11-20-2023 | 6.11:8.1.0 | Doc ID: RM100000001KX3Y |
| Model Year Start: 2020 | Model: Camry HV | Prod Date Range: [09/2019 - ] |
| Title: TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: TERMINALS OF ECU; 2020 - 2024 MY Camry HV [09/2019 - ] | ||
TERMINALS OF ECU
CHECK TIRE PRESSURE WARNING ECU AND RECEIVER (BEFORE SEP. 2021 PRODUCTION)
(a) Disconnect the R9 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 |
|---|---|---|---|---|
|
R9-1 (IG) - R9-12 (GND) |
LA-B - W-B |
IG power source |
Power switch on (IG) |
10 to 16 V |
|
R9-7 (+B) - R9-12 (GND) |
LA-R - W-B |
Power supply (from auxiliary battery) |
Always |
10 to 16 V |
|
R9-9 (CANH) - R9-10 (CANL)* |
L - W |
CAN communication line |
Power switch off |
54 to 69 Ω |
|
R9-12 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
- *: w/ Tire Inflation Pressure Display Function
(b) Connect the R9 tire pressure warning ECU and receiver connector.
(c) 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.
|
*a |
Component with harness connected (Tire Pressure Warning ECU and Receiver) |
- |
- |
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
R9-3 (CLSW) - R9-12 (GND) |
SB - W-B |
Tire pressure warning reset switch |
|
Below 1.5 V |
|
8 to 15 V |
|||
|
R9-4 (RDA) - R9-12 (GND) |
GR - W-B |
Output signals |
Power switch on (IG) |
Pulse generation (see waveform 1) |
|
R9-5 (PRG) - R9-12 (GND) |
R - W-B |
Input signals |
Power switch on (IG) |
Pulse generation (see waveform 1) |
(d) Using an oscilloscope, check waveform 1.
|
*a |
Example |
|
*b |
GND |
Waveform 1:
|
Item |
Contents |
|---|---|
|
Terminal |
R9-4 (RDA) - R9-12 (GND) R9-5 (PRG) - R9-12 (GND) |
|
Tool setting |
5 V/DIV, 5 ms./DIV. |
|
Vehicle condition |
Power switch on (IG) |
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.
CHECK TIRE PRESSURE WARNING ECU AND RECEIVER (FROM SEP. 2021 PRODUCTION)
(a) Disconnect the R127 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 |
|---|---|---|---|---|
|
R127-1 (IG) - R127-12 (GND) |
LA-B - W-B |
IG power source |
Power switch on (IG) |
10 to 16 V |
|
R127-7 (+B) - R127-12 (GND) |
LA-R - W-B |
Power supply (from auxiliary battery) |
Always |
10 to 16 V |
|
R127-9 (CANH) - R127-10 (CANL)* |
L - W |
CAN communication line |
Power switch off |
54 to 69 Ω |
|
R127-12 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
- *: w/ Tire Inflation Pressure Display Function
(b) Connect the R127 tire pressure warning ECU and receiver connector.
(c) 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.
|
*a |
Component with harness connected (Tire Pressure Warning ECU and Receiver) |
- |
- |
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
R127-3 (CLSW) - R127-12 (GND) |
SB - W-B |
Tire pressure warning reset switch |
|
Below 1.5 V |
|
8 to 15 V |
|||
|
R127-4 (RDA) - R127-12 (GND) |
GR - W-B |
Output signals |
Power switch on (IG) |
Pulse generation (see waveform 1) |
|
R127-5 (PRG) - R127-12 (GND) |
R - W-B |
Input signals |
Power switch on (IG) |
Pulse generation (see waveform 1) |
(d) Using an oscilloscope, check waveform 1.
|
*a |
Example |
|
*b |
GND |
Waveform 1:
|
Item |
Contents |
|---|---|
|
Terminal |
R127-4 (RDA) - R127-12 (GND) R127-5 (PRG) - R127-12 (GND) |
|
Tool setting |
5 V/DIV, 5 ms./DIV. |
|
Vehicle condition |
Power switch on (IG) |
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.
|
|