ENGINE GENERAL INFORMATION AND DIAGNOSIS (G16/J20 ENGINES) 6-9
WARM-UP CYCLE
A “warm-up cycle” means sufficient vehicle operation such that
the coolant temperature has risen by at least 22
°
C (40
°
F) from
engine starting and reaches a minimum temperature of 70
°
C
(158
°
F).
DRIVING CYCLE
A “driving cycle” consists of two parts, engine startup and engine
shutoff.
2 DRIVEING CYCLE DETECTION LOGIC
The malfunction detected in the first driving cycle is stored in
ECM (PCM) memory (in the form of pending DTC) but the mal-
function indicator lamp does not light at this time. It lights up at the
second detection of same malfunction also in the next driving
cycle.
PENDING DIAGNOSTIC TROUBLE CODE (DTC)
Pending DTC means a DTC detected and stored temporarily at 1
driving cycle of the DTC which is detected in the 2 driving cycle
detection logic.
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