How To Read Diagnostic Trouble Codes And 1ST Trip Diagnostic Trouble Codes: Notes

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: Display SELECT SYSTEM Screen

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

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

Fig 2: Display SELF-DIAG RESULTS Screen (1 Of 2)

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: Display SELF-DIAG RESULTS Screen (2 Of 2)

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