Component Function Check
1.CHECK THE ILLUMINATION OF THE LOW TIRE PRESSURE WARNING LAMP
Check that the low tire pressure warning lamp is turned OFF after illuminating for approximately 1 second, when the ignition switch is turned ON.
Is the inspection result normal?
YES >> Inspection End.
NO >> Perform trouble diagnosis. Refer to WT "Diagnosis Procedure".
Diagnosis Procedure
1.PERFORM SELF DIAGNOSTIC RESULT
With CONSULT
Are any DTCs detected?
YES >> Refer to BCS "DTC Index" or BCS "DTC Index".
NO >> GO TO 3.
2.CHECK LOW TIRE PRESSURE WARNING LAMP SIGNAL
With CONSULT
Is the inspection result normal?
YES >> Check the combination meter. Refer to MWI, "CONSULT Function" (type B) or MWI "CONSULT Function" (type A).
NO >> Replace the BCM. Refer to BCS "Removal and Installation" or BCS "Removal and Installation".
P1148 closed loop control
DTC Logic
DTC DETECTION LOGIC
NOTE:
DTC P1148 is displayed with DTC for A/F sensor 1.
When the DTC is detected, perform the trouble diagnosis of DTC corresponding to
A/F sensor 1.
DTC No.
Trouble diagnosis
(Trouble diagnosis content)
DTC detecting condition
Possible cause ...
S connector circuit
Description
The starter motor magnetic switch is supplied with power when the ignition
switch is turned to the START position
while the selector lever is in the P (Park) or N (Neutral) position.
Diagnosis Procedure
Regarding Wiring Diagram information, refer to STR, "Wiring Diagram - Wit ...