Hyundai transaxle DTCs

This TSB applies to Hyundai vehicles equipped with an automatic transaxle where DTCs P0715, P0716, P0717, P0720, P0721 and P0722 are present.

Models include 1999-2005 Sonata, 2006 and later Sonata, 2001-2006 Elantra, 2007 & later Elantra, 2001-2006 Santa Fe, 2007 and later Santa Fe, 2001-2005 XG300/350, 2006 and later Azera, 2003 and later Tiburon, 2005-2009 Tucson and 2007 and later Entourage.

An improperly functioning input speed sensor or output speed sensor may result in the following conditions:

-          Check engine light on

-          Harsh P-R or P-D engagement shock

-          Transaxle in 3^rd gear fail-safe

-          DTCs present

PARTS INFORMATION

Input speed sensor…………42620-39051 / 42620-39200

Output speed sensor……….42621-39052 / 42621-39200

(Refer to parts catalog)

SERVICE PROCEDURE

1. Using a GDS, check for DTCs in both the “Engine” and “Automatic Transaxle” menus. Record the DTC and description.
2. From the GDS, select:

-          Vehicle

-          “Auto Transaxle” menu

-          “Current Data”

-          Input speed sensor” and “output speed sensor.” Drive the vehicle and monitor the input and output speed sensors. If the sensors show continuous output, the wiring currently has no open/shorts. Go to Step 6. If no output, go to Step 3.

3. Check the wiring harness visually for an open or short circuit to ground. Check for a pinched harness at the PCM/TCM attachment bolts.
4. Disconnect the connectors at the input and output speed sensor and PCM/TCM. Check for bent pins or pins not fully inserted into the connector.
5. If a harness open/short is found, repair or replace the ECM control harness between the PCM/TCM and transaxle, and go to Step 8. If not, go to Step 6.
6. P0722 ONLY: For 2006 and later Sonata, 2007 and later Entourage and 2006 and later Azera vehicles, check the ground bolt at the location shown in the accompanying photo. Confirm that the threads are clean and that the bolt is tight.
7. If the ground bolts are clean and tight, perform the following repair:

DTC                   DESCRIPTION                                          REPAIR PROCEDURE

P0715……..Input speed sensor – no signal …………….Replace input speed sensor

P0716…….Input speed sensor range/performance……..Replace input speed sensor

P0717…….Input speed sensor no signal ……………….Replace input speed sensor

P0720…….Output speed sensor circuit…………………Replace output speed sensor

P0721…….Output speed sensor open/short…………….Replace output speed sensor

P0722…….Output speed sensor no signal………………Replace output speed sensor

P0700/P1529…TCM MIL request to ECM …………....…..Erase code

8. Drive the vehicle for two key-on to key-off driving cycles. If the codes do not set again, return the vehicle to the customer. If set again, go to Step 9.
9. Exchange a PCM or TCM from a similar year and model vehicle (excluding vehicles with immobilizer). If the codes set again, replace the control wiring harness. If they do not set again, replace the PCM or TCM.