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25 PERFORM IDLE AIR VOLUME LEARNING
Refer to “Idle Air Volume Learning”, EC-66.
Which is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT © GO TO 26.
INCMP © 1. Follow the construction of “Idle Air volume Learning”.
2. GO TO 25.
26 CHECK TARGET IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.
700±50 rpm (in “P” or “N” position)
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
700±50 rpm (in “P” or “N” position)
OK or NG
OK © GO TO 28.
NG © GO TO 27.
27 CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function.
(ECM may be the cause of a problem, but this is rarely the case.)
2. Perform initialization of IVIS (NATS) system and registration of IVIS (NATS) ignition key IDs. Refer to “IVIS (INFINITI
VEHICLE IMMOBILIZER SYSTEM — NATS)”, EC-82.
© GO TO 25.
28 CHECK IGNITION TIMING AGAIN
Check ignition timing again. Refer to Test No. 24.
OK or NG
OK © GO TO 30.
NG © GO TO 29.
29 CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to EM-29, “Installation”.
OK or NG
OK © GO TO 27.
NG © 1. Repair the timing chain installation.
2. GO TO 25.
30 ERASE UNNECESSARY DTC
After this inspection, unnecessary DTC No. might be displayed.
Erase the stored memory in ECM and TCM (Transmission control module).
Refer to “HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”, EC-80 and AT-38, “HOW TO ERASE
DTC”.
© INSPECTION END
TROUBLE DIAGNOSIS — BASIC INSPECTION
Basic Inspection (Cont’d)
EC-120
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