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CONSULT-II Reference Value in Data Monitor
Mode
NHEC0250
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
IACV-AAC/V
I Engine: After warming up
I Air conditioner switch: “OFF”
I Shift lever: “N”
I No-load
Idle 2 - 10 step
2,000 rpm —
On Board Diagnosis Logic
NHEC0252
Malfunction is detected when
(Malfunction A) the IACV-AAC valve does not operate properly,
(Malfunction B) the IACV-AAC valve does not operate properly.
Possible Cause
NHEC0515
MALFUNCTION A
NHEC0515S01
I Harness or connectors
(The IACV-AAC valve circuit is open.)
I IACV-AAC valve
MALFUNCTION B
NHEC0515S02
I Harness or connectors
(The IACV-AAC valve circuit is shorted.)
I Air control valve (Power steering)
I IACV-AAC valve
DTC Confirmation Procedure
NHEC0253
NOTE:
I If “DTC Confirmation Procedure” has been previously
conducted, always turn ignition switch “OFF” and wait at least
10 seconds before conducting the next test.
I Perform “PROCEDURE FOR MALFUNCTION A” first. If 1st
trip DTC cannot be confirmed, perform “PROCEDURE
FOR MALFUNCTION B”.
I If the target idle speed is out of the specified value, per-
form “Idle Air Volume Learning”, EC-66, before conducting
“DTC Confirmation Procedure”. For the target idle speed,
refer to the “Service Data and Specifications (SDS)”,
EC-644.
DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL
(AAC) VALVE
CONSULT-II Reference Value in Data Monitor Mode
EC-430
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