Toyota Camry (XV70): Tire Pressure Monitor ECU Communication Stop Mode
DESCRIPTION
|
Detection Item | Symptom |
Trouble Area |
|---|---|---|
| Tire Pressure Monitor ECU Communication Stop Mode |
Any of the following conditions are met:
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
NOTICE:
- Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.
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- Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
- After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
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- After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
- After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.
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- Inspect the fuses for circuits related to this system before performing the following procedure.
HINT:
- Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
- When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.
PROCEDURE
|
1. | CHECK VEHICLE TYPE |
(a) Check vehicle type.
|
Result | Proceed to |
|---|---|
|
w/ Smart Key System | A |
|
w/o Smart Key System |
B |
| B |
.gif) | GO TO STEP 4 |
|
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| 2. |
CHECK FOR OPEN IN CAN BUS LINES (TIRE PRESSURE WARNING ECU AND RECEIVER BRANCH LINE) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the R127 tire pressure warning ECU and receiver connector.
| (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG | | REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (TIRE PRESSURE WARNING ECU AND RECEIVER) |
|
| 3. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
| (a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(b) Reconnect the cable to the negative (-) battery terminal.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
R127-1 (IG) - Body ground |
Ignition switch ON | 11 to 14 V |
|
R127-7 (+B) - Body ground |
Always | 11 to 14 V |
| OK | | REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
| 4. |
CHECK FOR OPEN IN CAN BUS LINES (TIRE PRESSURE WARNING ECU AND RECEIVER BRANCH LINE) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the R128 tire pressure warning ECU and receiver connector.
| (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
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| NG | | REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (TIRE PRESSURE WARNING ECU AND RECEIVER) |
|
| 5. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
| (a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(b) Reconnect the cable to the negative (-) battery terminal.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
R128-1 (IG) - Body ground |
Ignition switch ON | 11 to 14 V |
|
R128-7 (+B) - Body ground |
Always | 11 to 14 V |
| OK | | REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
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Precaution
PRECAUTION PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL
NOTICE: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the c
Parts Location
PARTS LOCATION ILLUSTRATION
*1 MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY
*2 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
- ECU-B NO. 2 FUSE - DOOR F/L FUSE - DOOR F/R FUSE - DOOR R/L
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Abbreviations Used In Manual
ABBREVIATIONS USED IN MANUAL
Abbreviation Meaning
ABS Anti-Lock Brake System
A/C Air Conditioner
AC Alternating Current
ACC Accessory
ACIS Acoustic Control Induction System
ACM Active Control Engine Mount
ACSD Automatic Co
