DTC DETECTION LOGIC
NOTE:

DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON, and wait for 0.5 seconds or more.
2. Check "Self-diagnosis result" of BCM with CONSULT.
Is DTC detected?
YES >> Go to PCS "Diagnosis Procedure".
NO >> Inspection End.
Regarding Wiring Diagram information, refer to PCS "Wiring Diagram".
1. CHECK SELF DIAGNOSTIC RESULT FOR IPDM E/R
Perform self diagnostic result for IPDM E/R.
Are any DTCs detected?
YES >> Refer to PCS"DTC Index".
NO >> GO TO 2
2. CHECK IGNITION RELAY-1 POWER SUPPLY (IPDM E/R)
Check voltage between IPDM E/R connector E47 terminal 90 and ground.
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS "Removal and Installation".
NO >> GO TO 3.
3. CHECK IGNITION RELAY-1 POWER SUPPLY (BCM)
Check voltage between BCM connector M98 terminal 98 and ground.
Is the inspection result normal?
YES >> Refer to GI "Intermittent Incident".
NO >> Replace BCM. Refer to BCS "Removal and Installation".
P0506 ISC system
Description
The ECM controls the engine idle speed to a specified level through the fine
adjustment of the air, which is let
into the intake manifold, by operating the electric throttle control actuator.
The operating of the throttle valve is
varied to allow for optimum control of the engine ...
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 ...