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12 CHECK IGNITION TIMING
1. Start engine and let it idle.
2. Check ignition timing at idle using a timing light.
SEF572X
Ignition timing:
15°±5° BTDC (in “P” or “N” position)
OK or NG
OK © GO TO 18.
NG © GO TO 13.
13 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 14.
INCMP © 1. Follow the construction of “Idle Air volume Learning”.
2. GO TO 13.
14 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 16.
NG © GO TO 15.
15 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 13.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
BASIC SERVICE PROCEDURE
Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)
EC-59
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