Malfunction Indicator Lamp (Mil): Notes

Description

The MIL is located on the combination meter.

1. The MIL will illuminate when the ignition switch is turned ON without the engine running. This is a bulb check.

   If the MIL does not illuminate, chekc MIL circuit. Refer to "COMPONENT FUNCTION CHECK ".

2. When the engine is started, the MIL should go off.

   If the MIL remains illuminating, the on board diagnostic system has detected an engine system malfunction.

   Fig 1: Identifying Malfunction Indicator Lamp (MIL)

   Courtesy of NISSAN NORTH AMERICA, INC.

On Board Diagnostic System Function

The on board diagnostic system has the following three functions.

Diagnostic Test Mode	KEY and ENG. Status	Function	Explanation of Function
Mode I	Ignition switch in ON position Courtesy of NISSAN NORTH AMERICA, INC.NISSAN NORTH AMERICA, INC. Engine stopped Courtesy of NISSAN NORTH AMERICA, INC.NISSAN NORTH AMERICA, INC.	BULB CHECK	This function checks the MIL bulb for damage (blown, open circuit, etc.). If the MIL does not come illuminate, check MIL circuit.
	Engine running Courtesy of NISSAN NORTH AMERICA, INC.	MALFUNCTION WARNING	When a malfunction is detected twice in two consecutive driving cycles (two trip detection logic), the MIL will illuminate to inform the driver that a malfunction has been detected. The following malfunctions will illuminate or blink the MIL in the 1st trip. Misfire (Possible three way catalyst damage) One trip detection diagnoses
Mode II	Ignition switch in ON position Courtesy of NISSAN NORTH AMERICA, INC.NISSAN NORTH AMERICA, INC. Engine stopped Courtesy of NISSAN NORTH AMERICA, INC.NISSAN NORTH AMERICA, INC.	SELF-DIAGNOSTIC RESULTS	This function allows DTCs and 1st trip DTCs to be read.

Diagnostic Test Mode I - Bulb Check

In this mode, the MIL on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to "COMPONENT FUNCTION CHECK ".

Diagnostic Test Mode I - Malfunction Warning

MIL	Condition
ON	When the malfunction is detected.
OFF	No malfunction.

This DTC number is clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC RESULTS)

Diagnostic Test Mode II - Self-diagnostic Results

In this mode, the DTC and 1st trip DTC are indicated by the number of blinks of the MIL as shown below.

The DTC and 1st trip DTC are displayed at the same time. If the MIL 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 MIL illuminates 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 unidentified codes can be identified by using the CONSULT-III 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 per the following.

Number	0	1	2	3	4	5	6	7	8	9	A	B	C	D	E	F
Flashes	10	1	2	3	4	5	6	7	8	9	11	12	13	14	15	16

The length of time the 1, 000th-digit numeral flashes on and off is 1.2 seconds consisting of an ON (0.6-seconds) - OFF (0.6-seconds) cycle.

The 100th-digit numeral and lower digit numerals consist of a 0.3-seconds ON and 0.3-seconds OFF cycle.

A change from one digit numeral to another occurs at an interval of 1.0-second OFF. In other words, the later 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-seconds OFF.

In this way, all the detected malfunctions are classified by their DTC numbers. The DTC 0000 refers to no malfunction. (See "DTC INDEX ")

How to Switch Diagnostic Test Mode