Diagnostic Test Mode I — Bulb Check
NCEC0032S03
In this mode, the MI on the instrument panel should stay ON. If it remains OFF, check the MI bulb. Refer to
EL section (“WARNING LAMPS”) or see EC-QG-354.
Diagnostic Test Mode I — Malfunction Warning
NCEC0032S04
MI
Condition
ON
When the malfunction is detected or the ECM’s CPU is malfunctioning.
OFF
No malfunction.
I
These DTC numbers are clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC RESULTS).
Diagnostic Test Mode II — Self-diagnostic Results
NCEC0032S05
In this mode, the DTC and 1st trip DTC are indicated by the number of blinks of the MI.
The DTC and 1st trip DTC are displayed at the same time. If the MI does not illuminate in diagnostic test mode
I (Malfunction warning), all displayed items are 1st trip DTCs. If only one code is displayed when the MI illu-
minates in diagnostic test mode II (SELF-DIAGNOSTIC RESULTS), it is a DTC; if two or more codes are
displayed, they may be either DTCs or 1st trip DTCs. DTC No. is same as that of 1st trip DTC. These uni-
dentified codes can be identified by using the CONSULT-II or GST. A DTC will be used as an example for how
to read a code.
A particular trouble code can be identified by the number of four-digit numeral flashes. The “zero” is indicated
by the number of ten flashes. The length of time the 1000th-digit numeral flashes on and off is 1.2 seconds
consisting of an ON (0.6-second)-OFF (0.6-second) cycle.
The 100th-digit numeral and lower digit numerals consist of a 0.3-second ON and 0.3-second OFF cycle.
A change from one digit numeral to another occurs at an interval of 1.0 second OFF. In other words, the lat-
ter numeral appears on the display 1.3 seconds after the former numeral has disappeared.
A change from one trouble code to another occurs at an interval of 1.8 second off.
In this way, all the detected malfunctions are classified by their DTC numbers. The DTC “0000” refers to no
malfunction. (See TROUBLE DIAGNOSIS — INDEX, EC-QG-6.)
How to Erase Diagnostic Test Mode II (Self-diagnostic results)
NCEC0032S0501
The DTC can be erased from the backup memory in the ECM when the diagnostic test mode is changed from
Diagnostic Test Mode II to Diagnostic Test Mode I. (Refer to “HOW TO SWITCH DIAGNOSTIC TEST
MODES”.)
I
If the battery is disconnected, the DTC will be lost from the backup memory after approx. 24 hours.
I
Be careful not to erase the stored memory before starting trouble diagnoses.
SEF952W
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
QG16
I
18DE
Malfunction Indicator (MI) (Cont’d)
EC-49