System Readiness Test (SRT), Drive Pattern and Test Value and Limits (GST)

SYSTEM READINESS TEST (SRT) CODE
System Readiness Test (SRT) code is specified in Mode 1 of SAE J1979. It indicates whether the self-diagnostic tests for non-continuously monitored items have been completed or not. Inspection/Maintenance (I/M) tests of the on board diagnostic (OBD) II system may become the legal requirements in some states/areas. All SRT codes must be set in this case. Unless all SRT codes are set, conducting the I/M test may not be allowed. SRT codes are set after diagnosis has been performed two or more times. This occurs regardless of whether the diagnosis results in "OK" or "NG", and whether or not the diagnosis is performed in consecutive trips. The table below lists the five SRT items (9 diagnoses) for the ECCS used in B14 models.




SRT ITEMS / SELF-DIAGNOSTIC TEST ITEMS
Together with the DTC, the SRT code is cleared from the ECM memory using the method described later. In addition, after ECCS components/systems are repaired or if the battery terminals remain disconnected for more than 24 hours, all SRT codes may be cleared from the ECM memory.

How To Display SRT Code
1. Selecting "SRT" in "SRT OBT 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. "INCMP" means the self-diagnosis is incomplete and SRT is not set. "CMPLT" means the self-diagnosis is complete and SRT is set.

How To Set SRT Code
To set all SRT codes, all diagnoses 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 "Driving Patterns". This type of driving pattern should be performed two times or more to set all SRT codes.

NOTE: Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.

DRIVING PATTERN




Driving Pattern
- The time required for each diagnosis varies with road surface conditions, weather, altitude, individual driving habits, etc.
Zone A refers to the range where the time required, for the diagnosis under normal conditions*, is the shortest. Zone B refers to the range where the diagnosis can still be performed if the diagnosis is not completed within zone A.
Normal conditions refer to the following:
- Sea level
- Flat road
- Ambient air temperature: 20 - 30°C (68 - 86°F)
- Diagnosis is performed as quickly as possible under normal conditions.
Under different conditions [For example: ambient air temperature other than 20 - 30°C (68 - 86°F)], diagnosis may also be performed.
Pattern 1:
- The engine is started at the engine coolant temperature of -10 to 35°C (14 to 95°F) (where the voltage between the ECM terminals (51) and (50) is 3.0 - 4.3V).
- The engine must be operated at idle speed until the engine coolant temperature is greater than 70°C (158°F) (where the voltage between the ECM terminals (51) and (50) is lower than 1.4V).
Pattern 2:
- When steady-state driving is performed again even after it is interrupted, each diagnosis can be conducted. In this case, the time required for diagnosis may be extended.
Pattern 3:
- The driving pattern outlined in *2 must be repeated at least 3 times.On M/T models, shift gears following "suggested upshift speeds" schedule at right.
Pattern 4:
- Tests are performed after the engine has been operated for at least 12 minutes.
- The accelerator pedal must be held very steady during steady-state driving.
- If the accelerator pedal is moved, the test must be conducted all over again.
*1: Depress the accelerator pedal until vehicle speed is 90 km/h (56 MPH), then release the accelerator pedal and keep it released for more than 10 seconds. Depress the accelerator pedal until vehicle speed is 90 km/h (56 MPH) again.
*2: Operate the vehicle in the following driving pattern.




*3: The driving pattern may be omitted when EVAP (SMALL LEAK) checks are performed using the FUNCTION TEST mode of CONSULT.
*4: Checking the vehicle speed with CONSULT or GST is advised.

Suggested Transmission Gear Position For A/T Models
Set the selector lever in the "D" position with the overdrive on-off switch turned on.

Suggested Upshift Speeds For M/T Models
Shown below are suggested vehicle speeds for shifting into a higher gear. These suggestions relate to fuel economy and vehicle performance. Actual upshift speeds will vary according to road conditions, the weather and individual driving habits.

For normal acceleration in low altitude areas [less than 1,219 m (4,000 ft)]:

Gear change / ACCEL shift point km/h (MPH)
1st to 2nd / 24 (15)
2nd to 3rd / 40 (25)
3rd to 4th / 65 (40)
4th to 5th / 70 (43)

For quick acceleration in low altitude areas and high altitude areas [over 1,219 m (4,000 ft)]:

Gear change / km/h (MPH)
1st to 2nd / 25 (16)
2nd to 3rd / 55 (34)
3rd to 4th / 75 (47)
4th to 5th / 80 (50)

Suggested Maximum Speed In Each Gear
Downshift to a lower gear if the engine is not running smoothly, or if you need to accelerate.
Do not exceed the maximum suggested speed (shown below) in any gear. For level road driving, use the highest gear suggested for that speed. Always observe posted speed limits, and drive according to the road conditions, which will ensure safe operation. Do not over-rev the engine when shifting to a lower gear as it may cause engine damage or loss of vehicle control.

Gear km/h (MPH)
1st / 50 (31)
2nd / 90 (56)
3rd / 135 (84)
4th / -
5th / -




TEST VALUE AND TEST LIMIT
The following is the information specified in Mode 6 of SAE J 1979. The test value is a parameter used to determine whether a system/circuit diagnostic test is "OK" or "NG" while being monitored by the ECM during self-diagnosis. The test limit is a reference value which is specified as the maximum or minimum value and is compared with the test value being monitored. Items for which these data (test value and test limit) are displayed are the same as SRT code items (9 test items).
These data (test value and test limit) are specified by Test ID (TID) and Component ID (CID) and can be displayed on the CONSULT screen or GST.