Hey all, I was hoping you guys could help me out. I have a 1997 Elantra GLS, and recently failed a Connecticut Emissions Test due to a Communication Failure with the OBD-II connector.

I took it home and tried to scan it with my Snap On Solus Pro, and got the same error. No Communication.

Any ideas?

-Anthony

 

Maybe you can get another opinion? Go to Autozone, they'll do it for free. Tell them you have a "check engine" light, or they might not want to do it..

Another possibility is the fuse is blown. Check the cigarette lighter fuse and make sure it's working. Another thing you can do is unscrew the mounting and physically look at the connector and make sure it's not corroded, or somehow smashed.

 

well it failed at emissions and at my house. I'll swing by an autozone. I unscrewed and inspected it. it looks fine. The cigarette lighter also works. Cant think of anything else.

 

Test your Snap On scanner on another car just to verify it works ok. Then the chances are high there's a problem with your car. Did you recently disconnect the battery, or did the battery die? If so, it takes a while for the ODB II to reset and produce a reading.

 

I use the snap on daily it works with other cars. The cars battery did die a few weeks ago because it was at the shop getting some work done. I just acquired this car recently as I got rid of my lease to trade up for a mortgage. I would eventually like to turn this car around as it has very low mileage for the year, but this is preventing the emissions to Pass.

 

From HMA Service:

This TSB describes Drive Cycles which may assist the vehicle's OBD-II system to complete the necessary emissions systems tests and set the OBD-II Readiness Monitors to display READY (or COMPLETED -- described simply as "READY" in this TSB).

This TSB specifically covers the 1996-2000 ELANTRA And1997-2001 TIBURON.

The drive cycles described below are specifically designed to set the following items:

*
CATALYST
*
EVAP. PURGE
*
02 SENSOR
*
02 SENSOR HEATER

READINESS MONITOR:

The readiness monitors indicate if all the necessary emissions systems tests have been completed by the ECM.

This feature is a part of the OBD-II system.

It ensures that vehicles have had sufficient time to conduct all necessary emissions related diagnostics:

*
after a repair which resulted in the power to the ECM being interrupted
*
or resulted in clearing of Diagnostic Trouble Codes (DTCs) using a scan tool.

REPAIR PROCEDURE:

Depending on the model year of the vehicle, follow the correct Drive Cycle pattern.

IMPORTANT
In order to set the Readiness Monitors to READY, the vehicle must successfully complete the appropriate Drive Cycle TWO TIMES
.
DEFINITION OF TWO CONSECUTIVE DRIVE CYCLES:

That is, the vehicle must:

1.
Complete the Drive Cycle.
2.
The ignition key must be turned to the OFF position and stay off for at least 30 seconds.
3.
Complete the Drive Cycle a second time.

IMPORTANT
The two Drive Cycles MUST be completed on two CONSECUTIVE drives.

CONSECUTIVE
means that the two successful OBD-II Readiness Drive Cycles cannot be interrupted by any other kind of driving between them.

WARNING:
PRE-EXISTING CONDITIONS ON THE VEHICLE:

The vehicle will not set the Readiness Monitors even if the Drive Cycles are performed correctly, if the vehicle has certain pre-existing conditions.

Such as:

*
Stuck Open Thermostat:
If the thermostat is stuck open, the Engine Coolant Temperature (ECT) reading may drop below 176 degrees F. If the ECT reading drops below 176 F (especially during the steady state highway driving where the airflow across the radiator will cool the coolant quickly), the Drive Cycle will NOT be effective. In order for the Drive Cycle to "count," the ECT reading must be above 176 F.
*
Radiator Fans Stuck ON:
If the radiator fans are stuck ON, the ECT reading may drop below 176 F during the Drive Cycle. As with the stuck open thermostat, this condition will negate the Drive Cycle.

ROAD CONDITIONS:

The type of road that the Drive Cycle is performed on is important.

The BEST
type of road for performing the Drive Cycle is one that is as Level (Flat)
as possible.

If the Drive Cycle is performed in an area with hilly terrain
, it will be more difficult to successfully perform the Drive Cycle. In this case, it may require that the Drive Cycle be performed more than two times
to ensure success.

1996 and 1997 DRIVE CYCLE:

The chart on page 7 of this TSB shows the drive cycle for the 1996 MY and 1997 MY Elantra and Tiburon. The information below discusses, step-by-step, the procedure to be followed.

IMPORTANT
In the case of the 1996 and 1997 Elantra and Tiburon, in order to set the CATALYST, EVAP. PURGE, O2 SENSOR and O2 SENSOR HEATER monitors to READY, ALL FOUR of these diagnostic tests must be completed on the same drive
. If only three of the four monitors' diagnostics are completed on a test drive, NONE of the Readiness Monitors will indicate READY, and the drive cycle must be repeated.
The drive cycle described below covers the conditions required to run ALL four diagnostic tests.
STEP 1: (STARTING PROCEDURE)

*
Check to make sure that there are no DTCs stored in the ECM (using the Hi-Scan Pro) and that the Check Engine Light is OFF. If there is a DTC, repair the vehicle first.
*
Check the Readiness Status. The items indicating NOT READY should be CATALYST, EVAP. PURGE, O2 SENSOR and O2 SENSOR HEATER.
*
If the MISFIRE, FUEL SYSTEM OR COMPONENT monitors are not ready, then repair any conditions related to these items first.
*
Start the engine.
*
Warm up the engine (coolant temperature at least 176 degrees F).
*
Turn OFF the A/C.

STEP 2: (TRANSIENT TO STEADY STATE DRIVING)

*
Connect the Hi-Scan Pro and go to the current data menu. The two items to monitor during the drive cycle are the Engine RPM and Engine Load (displayed in milliseconds).
*
IMPORTANT:
Two people should conduct the drive cycle, one person to drive and the other person to monitor the Hi-Scan Pro readings and keep track of the driving time.
*
Drive the vehicle to a light traffic road where the required steady state driving condition can be duplicated.
*
Any kind of driving is OK before the steady state driving is conducted.

STEP 3: (STEADY STATE DRIVING - THIS IS THE MAIN PART OF THE DRIVE CYCLE)

*
Drive the vehicle at a steady state where the engine speed is between 2,000 and 2,400 RPM in high gear (5th speed in a manual transmission equipped vehicle and "D" position in an automatic). The engine load should be between 2.0 and 3.0 ms. To drive the vehicle in this steady state mode, very little throttle is required.
*
Drive in the Steady State Mode for a minimum of 10 minutes.
*
Note: During this phase of the drive cycle, if the vehicle "falls out" of the steady state zone criteria (in terms of engine RPM and engine load), the accumulated time does not increase; however, there is no need to restart the steady state mode. 10 minutes is the required ACCUMULATED time. If the vehicle "falls out" of the criteria, simply stop counting the time and restart counting the time when able to again meet the required criteria.

STEP 4: (TRANSIENT FROM STEADY STATE DRIVING TO AN IDLE STATE)

*
After accumulating at least 10 minutes of Steady State driving, continue driving the vehicle so that the total driving time (from STEP 1
, the start of the actual driving) is at least 17 minutes.
*
Any kind of driving is OK during this step.
*
Bring the vehicle to a stop at a location where the vehicle may idle.

STEP 5: (IDLE-STATE - THIS IS THE LAST PHASE OF THE DRIVE CYCLE)

*
After coming to a stop, allow the vehicle to idle for one minute (the transmission may be placed in Neutral or Park).
*
After one minute of idling, tip the throttle in and out (to take the engine out of idle-state briefly).
*
Allow the vehicle to idle for one more minute.

STEP 6: (ENGINE STOP)

*
The drive cycle is completed.
*
Turn off the engine (key in the OFF position) and wait 30 seconds.
*
After 30 seconds, restart the engine.
*
IF ONLY ONE DRIVE CYCLE HAS BEEN COMPLETED, CONDUCT ONE MORE DRIVE CYCLE.
*
After the conclusion of the second drive cycle, turn the key to the ON position. Check to see if the Readiness Monitors for the CATALYST, EVAP. PURGE, O2 SENSOR and O2 SENSOR HEATER indicate READY.
*
If not, then check to see if there are any DTC codes or if the Check Engine Light is ON. If yes, then repair the vehicle. After repair is completed, conduct the drive cycle two times.
*
If, after the conclusion of the second drive cycle, the Readiness Monitors for CATALYST, EVAP. PURGE, O2 SENSOR and O2 SENSOR HEATER still indicate NOT READY (or NOT COMPLETED), then conduct the drive cycle one more time and check the Readiness Codes again (the previous attempts at the drive cycle may not have been successfully completed).

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