How To Read DTC And 1ST Trip DTC: Notes

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

DTC and 1st trip DTC can be read by the following methods.

(with CONSULT-II or GST) CONSULT-II or GST (Generic Scan Tool) Examples: P0705, P0720 etc.

These DTC are prescribed by SAE J2012.

(CONSULT-II also displays the malfunctioning component or system.)

1st trip DTC No. is the same as DTC No.
Output of the diagnostic trouble code indicates that the indicated circuit has a malfunction. However, in case of the Mode II and GST, they do not indicate whether the malfunction is still occurring or occurred in the past and returned to normal.
CONSULT-II can identify them as shown below, therefore, CONSULT-II (if available) is recommended.

A sample of CONSULT-II display for DTC and 1st trip DTC is shown on the next page. DTC or 1st trip DTC of a malfunction is displayed in SELF-DIAGNOSTIC RESULTS mode for "ENGINE" with CONSULT-II. Time data indicates how many times the vehicle was driven after the last detection of a DTC.

Fig 1: Identifying Display - Select System

Courtesy of NISSAN MOTOR CO., U.S.A.

If the DTC is being detected currently, the time data will be "0".

Fig 2: Identifying Display - Self Diag Result

Courtesy of NISSAN MOTOR CO., U.S.A.

If a 1st trip DTC is stored in the ECM, the time data will be "1t".

Fig 3: Identifying Display - Self Diag Result

Courtesy of NISSAN MOTOR CO., U.S.A.