Lexus ES: 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: | -
Tire pressure warning ECU and receiver branch line or connector
-
Power source circuit of tire pressure warning ECU and receiver
-
Tire pressure warning ECU and receiver ground circuit
-
Tire pressure warning ECU and receiver
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
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 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 N8 tire pressure warning ECU and receiver connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection | Condition | Specified Condition | N8-9 (CANH) - N8-10 (CANL) | Cable disconnected from negative (-) battery terminal | 54 to 69 Ω | | | *a | Front view of wire harness connector (to Tire Pressure Warning ECU and Receiver) | | |
NG | | REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (TIRE PRESSURE WARNING ECU AND RECEIVER) |
OK | | |
2. | CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection | Condition | Specified Condition | N8-12 (GND) - Body ground | Cable disconnected from negative (-) battery terminal | Below 1 Ω | | | *a | Front view of wire harness connector (to Tire Pressure Warning ECU and Receiver) | | |
(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 |
N8-1 (IG) - Body ground | Engine switch on (IG) | 11 to 14 V |
N8-7 (+B) - Body ground | Always | 11 to 14 V |
NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
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SEE MORE:
PARTS LOCATION ILLUSTRATION *A w/o AVS *B for 2WD *C for AWD - - *1 FRONT AXLE HUB SUB-ASSEMBLY RH - FRONT SPEED SENSOR ROTOR RH *2 FRONT SPEED SENSOR RH *3 FRONT AXLE HUB SUB-ASSEMBLY LH - FRONT SPEED SENSOR ROTOR LH *4 FRONT SPEED SENSOR LH *5 REAR AXL
PRECAUTION PRECAUTION (a) Before disassembling the transfer assembly, thoroughly clean it to remove any foreign matter. This will help prevent contamination inside the transfer during disassembly and reassembly. (b) When removing the transfer cover or any other light alloy parts, do not pry them off
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