Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: It is necessary to perform initialization (See INITIALIZATION ) after registration (See REGISTRATION ) of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU has been replaced.

CHECK TIRE PRESSURE WARNING RESET SWITCH FUNCTION

Turn the engine switch on (IG)
Check that the tire pressure warning light comes on for 3 seconds

Perform the tire pressure warning reset switch test in Test Mode Procedure (See TEST MODE PROCEDURE )

Result

RESULT REFERENCE

Result	Proceed to
Reset switch ON	Tire pressure warning light comes on.
Reset switch OFF	Tire pressure warning light blinks.

NG: Go to step 2

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )

CHECK TIRE PRESSURE WARNING RESET SWITCH
1. Using the satellite switch, check that the switch operates normally in the other modes. (For example: TACH INDICATOR mode)
  OK: The satellite switch operates normally.
NG: Go to step 4

OK: Go to next step.

CHECK HARNESS AND CONNECTOR (COMBINATION METER - TIRE PRESSURE WARNING ECU AND RECEIVER)

Disconnect the tire pressure warning ECU and receiver J49 connector and combination meter J34 connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
J49-4 (CLSW) - J34-15 (INT)	Always	Below 1 Ω
J49-4 (CLSW) - Body ground	Always	10 kΩ or higher

Fig 1: Identifying Terminals Of Tire Pressure Warning ECU And Receiver J49 And Combination Meter J34 Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER (See REMOVAL )

INSPECT TIRE PRESSURE WARNING RESET SWITCH

Disconnect the satellite J16 connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Switch Position	Tester Connection	Specified Condition
Left switch on	J16-2 (LSFT) - J16-5 (E)	Below 1 Ω
Set switch on	J16-3 (SET) - J16-5 (E)	Below 1 Ω
Right switch on	J16-4 (RSEL) - J16-5 (E)	Below 1 Ω
Left switch off	J16-2 (LSFT) - J16-5 (E)	10 kΩ or higher
Set switch off	J16-3 (SET) - J16-5 (E)	10 kΩ or higher
Right switch off	J16-4 (RSEL) - J16-5 (E)	10 kΩ or higher

HINT:

The satellite switch is used as the tire pressure warning reset switch As a result, the inspection above describes inspection of the satellite switch. If a fault is confirmed in the above inspection, replace the satellite switch.

Fig 2: Identifying Terminals Of Satellite J16 Connector

NG: REPLACE TIRE PRESSURE WARNING RESET SWITCH (SATELLITE SWITCH) (See TIRE PRESSURE WARNING RESET SWITCH )

OK: Go to next step.

CHECK HARNESS AND CONNECTOR (COMBINATION METER - SATELLITE SWITCH)

Disconnect the satellite switch J16 connector and combination meter J35 connector.

Measure the resistance according to the value(s) in the table below

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
J35-6 (LSEL) - J16-2 (LSFT)	Always	Below 1 Ω
J35-7 (SET) - J16-3 (SET)	Always	Below 1 Ω
J35-5 (RSEL) - J16-4 (RSEL)	Always	Below 1 Ω
J16-5 (E) - Body ground	Always	Below 1 Ω
J35-6 (LSEL) - Body ground	Always	10 kΩ or higher
J35-7 (SET) - Body ground	Always	10 kΩ or higher
J35-5 (RSEL) - Body ground	Always	10 kΩ or higher

Fig 3: Identifying Terminals Of Satellite Switch J16 Connector And Combination Meter J35 Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE COMBINATION METER (See REMOVAL )