DTC Description
DTC DETECTION LOGIC
DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condition |
P1148 | CLOSED LOOP-B1 (CLOSED LOOP-B1) | The closed loop control function does not operate even when vehicle is being driven in the specified condition. |
POSSIBLE CAUSE
FAIL-SAFE
Not applicable
Diagnosis Procedure
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.
Refer to EC-93, "DTC Index".
Changing engine oil
Changing engine oil
Park the vehicle on a level surface and apply
the parking brake.
Start the engine and let it idle until it reaches
operating temperature, then turn it off.
Remove the oil filler cap B by turning it
counterclockwise.
Place a large drain pan u ...
Sample/Wiring Diagram -Example-
Each section includes wiring diagrams.
Description
Number
Item
Description
1
Power supply
This means the power supply of fusible link or fuse.
2
Fuse
“/” means the fuse.
3
Current rating of fusible
...
ECU diagnosis information
EPS CONTROL UNIT
Reference Value
VALUES ON THE DIAGNOSIS TOOL
CAUTION:
The output signal indicates the EPS control unit calculation data. The normal
values will be displayed
even in the event that the output circuit (harness) is open.
NOTE:
The following table includes information (items) ...