Inspection Procedure
NOTE:
- When replacing the tire pressure warning ECU, read the transmitter IDs stored in the old ECU using Techstream and note down before removal.
- It is necessary to perform initialization (See INITIALIZATION ) after registration (See REGISTRATION ) of the transmitter IDs into the tire pressure warning ECU if the ECU has been replaced.
- CHECK TIRE PRESSURE WARNING RESET SWITCH FUNCTION
- Perform the tire pressure warning reset switch test in TEST MODE PROCEDURE (See TEST MODE PROCEDURE ).
OK:
Reset switch ON:
Tire pressure warning light turns on.
Reset switch OFF:
Tire pressure warning light blinks at 0.125 second.
NG: Go to step 2
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
- INSPECT TIRE PRESSURE WARNING RESET SWITCH
- Remove the tire pressure warning reset switch (See REMOVAL ).
- Measure the resistance according to the value (s) in the table below.
Standard resistance
STANDARD RESISTANCE SPECIFICATIONTester Connection Switch Condition Specified Condition D32-1 - D32-2 ON Below 1 Ω OFF 10 kΩ or higher NG: REPLACE TIRE PRESSURE WARNING RESET SWITCH (See REMOVAL )
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (RESET SWITCH - ECU AND BODY GROUND)
- Disconnect the D32 reset switch connector.
- Disconnect the D33 ECU connector.
- Measure the resistance according to the value (s) in the table below.
Standard resistance
STANDARD RESISTANCE SPECIFICATIONTester Connection Condition Specified Condition D33-1 (CLSW) - D32-1 Always Below 1 Ω D33-1 (CLSW) - Body ground Always 10 kΩ or higher D32-2 - Body ground Always Below 1 Ω NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK: REPLACE TIRE PRESSURE WARNING ECU (See REMOVAL )