Introduction
How To Read DTC And 1st Trip DTC (Overview)
DTC and 1st trip DTC can be read by the following methods.
1. The number of blinks of the malfunction indicator lamp in the Diagnostic Test Mode II (Self-Diagnostic Results) Examples: 0101, 0201, 1003, 1104, etc.
These DTCs are controlled by NISSAN.
2. CONSULT or GST (Generic Scan Tool) Examples: P0340, P1320, P0705, P0750, etc. These DTCs are prescribed by SAE J2012.
(CONSULT also displays the malfunctioning component or system.)
- 1st trip DTC No. is the same as DTC No.
- Output of a DTC indicates a malfunction. However, Mode II and GST do not indicate whether the malfunction is still occurring or has occurred in the past and has returned to normal.
CONSULT can identify malfunction status as shown below. Therefore, using CONSULT (if available) is recommended.
A sample of CONSULT display for DTC is shown at left. DTC or 1st trip DTC of a malfunction is displayed in SELF-DIAGNOSTIC RESULTS mode of CONSULT Time data indicates how many times the vehicle was driven after the last detection of a DTC.
If the DTC is being detected currently, the time data will be "0".
If a 1st trip DTC is stored in the ECM, the time data will be "[1t]".
SRT Items / Self-Diagnostic Test Items
Catalyst monitoring
- Three way catalyst function P0420 (0720)
Oxygen sensor monitoring
- Front heated oxygen sensor P0130 (0503)
- Rear heated oxygen sensor P0136 (0707)
Oxygen sensor heater monitoring
- Front heated oxygen sensor heater P0135 (0901)
- Rear heated oxygen sensor heater P0141 (0902)
EGR system monitoring
- EGR function P0400 (0302)
- EGRC-BPT valve function P0402 (0306)
How To Display SRT Code (Overview)
1. Selecting "SRT" in "SRT OBD TEST VALUE" mode with CONSULT
For items whose SRT codes are set, a "CMPLT" is displayed on the CONSULT screen; for items whose SRT codes are not set, "INCMP" is displayed.
2. Selecting Mode 1 with GST (Generic Scan Tool)
A sample of CONSULT display for SRT code is shown at left. "INCMP" means the self-diagnosis is incomplete and SRT is not set. "CMPLT" means the self-diagnosis is complete and SRT is set.
Driving Pattern:
How To Set SRT Code (Overview)
To set all SRT codes, self-diagnosis for the items indicated above must be performed two or more times. Each diagnosis may require a long period of actual driving under various conditions. The most efficient driving pattern in which SRT codes can be properly set is explained in the "driving pattern". The driving pattern should be performed two times or more to set all SRT codes. Self-diagnoses of "EVAP PURGE FLOW/MON" and "EVAP (SMALL LEAK)" are not provided for V40 models. Use driving patterns 1 through 3 for these items.
How To Erase Emission-Related Diagnostic Information (Overview)
The emission-related diagnostic information can be erased by the following methods.
Selecting "ERASE" in the "SELF-DIAG RESULTS" mode with CONSULT
Selecting Mode 4 with GST (Generic Scan Tool)
Changing the diagnostic test mode from Diagnostic Test Mode II to Mode I by turning the mode selector on the ECM.
- If the battery is disconnected, the emission-related diagnostic information will be lost after approx 24 hours
- Erasing the emission-related diagnostic information using CONSULT or GST is easier and quicker than switching the mode selector on the ECM
The following data are cleared when the ECM memory is erased.
1. Diagnostic trouble codes
2. 1st trip diagnostic trouble codes
3. Freeze frame data
4. 1st trip freeze frame data
5. System readiness test (SRT) codes
6. Test values
7. Others
NOTE: Actual work procedures are explained using a DTC as an example. Be careful so that not only the DTC, but all of the data listed above, are cleared from the ECM memory during work procedures.