Was the Data Link Connector Diagnostic System Check performed?

--

Go to Step 2

Go to Data Link Communications System Check

1. Connect the scan tool to another vehicle of the same model year in order to ensure proper operation of the scan tool.
2. Turn the ignition switch to RUN.
3. Attempt to establish communication with the vehicle.

Does the scan tool communicate with the vehicle?

--

Go to Step 4

Go to Step 3

The scan tool may be malfunctioning. Refer to the scan tool instruction manual. Ensure that the scan tool is functioning.

Does the scan tool operate properly?

--

Go to Data Link Communications System Check

--

1. Connect the scan tool to the original vehicle.
2. Verify that the scan tool connections are clean and tight.

Is the terminal contact between the DLC and the scan tool OK?

--

Go to Step 6

Go to Step 5

Repair the terminal contact at the DLC.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Connect the scan tool.
2. Turn the ignition switch to RUN, with the engine OFF.

Does the scan tool turn ON?

--

Go to Step 12

Go to Step 7

Measure the voltage between DLC terminal 16 and the chassis ground.

Is the voltage within the specified range?

10-15 V

Go to Step 9

Go to Step 8

Repair the open or the short to ground in CKT 40 (ORN).

Is the repair complete?

--

Go to Data Link Communications System Check

--

Measure the voltage between DLC terminal 16 and terminal 5.

Is the voltage within the specified range?

10-15 V

Go to Step 11

Go to Step 10

Repair the open in CKT 451 (BLK/WHT).

Is the repair complete?

--

Go to Data Link Communications System Check

--

Repair the open in CKT 1250 (BLK)

Is the repair complete?

--

Go to Data Link Communications System Check

--

Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 15

Go to Step 13

Measure the resistance from DLC terminal 9 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 28

Go to Step 14

Repair the open in CKT 800 (TAN) between DLC terminal 9 and S226.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the EBTCM.
2. Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 17

Go to Step 16

Replace the EBTCM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the PCM.
2. Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 19

Go to Step 18

Replace the PCM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the heater and the A/C programmer.
2. Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 21

Go to Step 20

Measure the voltage from the heater and A/C programmer connector terminal E11 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 41

Go to Step 42

1. Disconnect the transmission position decoder module.
2. Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 23

Go to Step 22

Replace the transmission position decoder module.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the instrument cluster.
2. Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 25

Go to Step 24

Replace the instrument cluster.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the SDM.
2. Measure the voltage from the DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 27

Go to Step 26

Replace the SDM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

Repair the short to battery positive voltage (B+) in CKT 800 (TAN).

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the EBTCM.
2. Measure the resistance from DLC terminal 9 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 30

Go to Step 29

Replace the EBTCM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the PCM.
2. Measure the resistance from DLC terminal 9 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 32

Go to Step 31

Replace the PCM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the heater and A/C programmer.
2. Measure the resistance from DLC terminal 9 to ground.

Is resistance within the specified range?

0-5 ohms

Go to Step 34

Go to Step 33

Measure the resistance from the heater and A/C programmer connector terminal E11 and ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 43

Go to Step 42

1. Disconnect the transmission position decoder module.
2. Measure the resistance from DLC terminal 9 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 36

Go to Step 35

Replace the transmission position decoder module.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the instrument cluster.
2. Measure the resistance from DLC terminal 9 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 38

Go to Step 37

Replace the instrument cluster.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the SDM
2. Measure the resistance from DLC terminal 9 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 40

Go to Step 39

Replace the SDM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

Repair the short to ground in CKT 800 (TAN).

Is the repair complete?

--

Go to Data Link Communications System Check

--

Repair the short to battery positive voltage (B+) in CKT 800 (TAN) between the EBTCM and the heater and A/C programmer.

Is the repair complete?

--

Go to Data Link Communications System Check

--

Replace the heater and A/C programmer.

Is the repair complete?

--

Go to Data Link Communications System Check

--

Repair the short to ground in CKT 800 (TAN) between the EBTCM and the heater and A/C programmer.

Is the repair complete?

--

Go to Data Link Communications System Check

--

Was the Data Link Connector System Check performed?

--

Go to Step 2

Go to Data Link Communications System Check

1. Connect the scan tool to another vehicle of the same model year in order to ensure proper operation of the scan tool.
2. Turn the ignition switch to RUN.
3. Attempt to establish communication with the vehicle.

Does the scan tool communicate with the vehicle?

--

Go to Step 4

Go to Step 3

The scan tool may be malfunctioning. Refer to the scan tool instruction manual. Ensure that the scan tool is functioning.

Does the scan tool operate properly?

--

Go to Data Link Communications System Check

--

1. Connect the scan tool to the original vehicle.
2. Verify the scan tool connections are clean and tight.

Is the terminal contact between the DLC and the scan tool OK?

--

Go to Step 6

Go to Step 5

Repair the terminal contact at the DLC.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Connect the scan tool.
2. Turn the ignition switch to RUN, with the engine OFF.

Will the scan tool turn ON?

--

Go to Step 12

Go to Step 7

Measure the voltage between DLC terminal 16 and chassis ground.

Is the voltage within the specified range?

10-15 V

Go to Step 9

Go to Step 8

Repair the open or the short to ground in CKT 40 (ORN).

Is the repair complete?

--

Go to Data Link Communications System Check

--

Measure the voltage between DLC terminal 16 and terminal 5.

Is the voltage within the specified range?

10-15 V

Go to Step 11

Go to Step 10

Repair the open in CKT 451 (BLK/WHT).

Is the repair complete?

--

Go to Data Link Communications System Check

--

Repair the open in CKT 1250 (BLK)

Is the repair complete?

--

Go to Data Link Communications System Check

--

Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 15

Go to Step 13

Measure the resistance from DLC terminal 9 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 26

Go to Step 14

Repair the open in CKT 800 (TAN) between DLC terminal 9 and S226.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the EBTCM.
2. Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 17

Go to Step 16

Replace the EBTCM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the PCM.
2. Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 19

Go to Step 18

Replace the PCM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the heater and A/C programmer.
2. Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 21

Go to Step 20

Measure the voltage from the heater and A/C programmer connector terminal C11 and ground.

Is the voltage within the specified range?

10-15 V

Go to Step 37

Go to Step 38

1. Disconnect the SDM.
2. Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 23

Go to Step 22

Replace the SDM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the transmission position indicator lamp.
2. Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 25

Go to Step 24

Replace the transmission position decoder module.

Is the repair complete?

--

Go to Data Link Communications System Check

--

Repair the short to battery positive voltage (B+) in CKT 800 (TAN).

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the EBTCM.
2. Measure the resistance from DLC terminal 9 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 28

Go to Step 27

Replace the EBTCM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the PCM.
2. Measure the resistance from DLC terminal 9 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 30

Go to Step 29

Replace the PCM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the heater and the A/C programmer.
2. Measure the resistance from DLC terminal 9 to ground.

Is resistance within the specified range?

0-5 ohms

Go to Step 32

Go to Step 31

Measure the resistance from the heater and A/C programmer connector C11 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 39

Go to Step 38

1. Disconnect the SDM.
2. Measure the resistance from DLC terminal 9 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 34

Go to Step 33

Replace the SDM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the transmission position decoder module.
2. Measure the resistance from DLC terminal 9 to ground.

Is the resistance within the specified range?

--

Go to Step 36

Go to Step 35

Replace the transmission position decoder module.

Is the repair complete?

--

Go to Data Link Communications System Check

--

Repair the short to ground in CKT 800 (TAN).

Is the repair complete?

--

Go to Data Link Communications System Check

--

Repair the short to battery positive voltage (B+) in CKT 800 (TAN) between the EBTCM and the heater and A/C programmer.

Is the repair complete?

--

Go to Data Link Communications System Check

--

Replace the heater and A/C programmer.

Is the repair complete?

--

Go to Data Link Communications System Check

--

Repair the short to ground in CKT 800 (TAN) between the EBTCM and the heater and A/C programmer.

Is the repair complete?

--

Go to Data Link Communications System Check

--

Was the Data Link Connector System Check performed?

--

Go to Step 2

Go to Data Link Communications System Check

1. Connect the scan tool to another vehicle of the same model year in order to ensure proper operation of the scan tool.
2. Turn the ignition switch to RUN.
3. Attempt to establish communication with the vehicle.

Does the scan tool communicate with the vehicle?

--

Go to Step 4

Go to Step 3

The scan tool may be malfunctioning. Refer to the scan tool instruction manual. Ensure that the scan tool is functioning.

Does the scan tool operate properly?

--

Go to Data Link Communications System Check

--

1. Connect the scan tool to the original vehicle.
2. Verify the scan tool connections are clean and tight.

Is the terminal contact between the DLC and the scan tool OK?

--

Go to Step 6

Go to Step 5

Repair the terminal contact at the DLC.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Connect the scan tool.
2. Turn the ignition switch to RUN, with the engine off.

Does the scan tool turn on?

--

Go to Step 12

Go to Step 7

Measure the voltage between DLC terminal 16 and chassis ground.

Is the voltage within the specified range?

10-15 V

Go to Step 9

Go to Step 8

Repair the open or the short to ground in CKT 40 (ORN).

Is the repair complete?

--

Go to Data Link Communications System Check

--

Measure the voltage between DLC terminal 16 and terminal 5.

Is the voltage within the specified range?

10-15 V

Go to Step 11

Go to Step 10

Repair the open in CKT 451 (BLK/WHT).

Is the repair complete?

--

Go to Data Link Communications System Check

--

Repair the open in CKT 1250 (BLK)

Is the repair complete?

--

Go to Data Link Communications System Check

--

Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 15

Go to Step 13

Measure the resistance from DLC terminal 9 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 24

Go to Step 14

Repair the open in CKT 800 (TAN) between DLC terminal 9 and S226.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the EBTCM.
2. Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 17

Go to Step 16

Replace the EBTCM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the PCM.
2. Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 19

Go to Step 18

Replace the PCM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the heater and A/C programmer.
2. Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 21

Go to Step 20

Measure the voltage from the heater and A/C programmer connector terminal E11 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 34

Go to Step 33

1. Disconnect the SDM.
2. Measure the voltage from DLC terminal 9 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 23

Go to Step 22

Replace the SDM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

Repair the short to battery positive voltage (B+) in CKT 800 (TAN).

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the EBTCM.
2. Measure the resistance from DLC terminal 9 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 26

Go to Step 25

Replace the EBTCM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the PCM.
2. Measure the resistance from DLC terminal 9 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 28

Go to Step 27

Replace the PCM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

1. Disconnect the heater and A/C programmer.
2. Measure the resistance from DLC terminal 9 to ground.

Is the resistance within the specified?

0-5 ohms

Go to Step 30

Go to Step 29

Measure the resistance from the heater and A/C programmer connector terminal E11 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 30

Go to Step 29

1. Disconnect the SDM.
2. Measure the resistance from DLC terminal 9 to ground.

Is the resistance within the specified range?

0-5 ohms

Go to Step 32

Go to Step 31

Replace the SDM.

Is the repair complete?

--

Go to Data Link Communications System Check

--

Repair the short to ground in CKT 800 (TAN/BLK).

Is the repair complete?

--

Go to Data Link Communications System Check

--

Replace the heater and A/C programmer.

Is the repair complete?

--

Refer to Data Link Communications System Check

--

Repair the short to battery positive voltage in CKT 800 (TAN) between the EBTCM and the heater and A/C programmer.

Is the repair complete?

--

Go to Data Link Communications System Check

--

Repair the short to ground in CKT 800 (TAN) between the EBTCM and the heater and A/C programmer.

Is the repair complete?

--

Go to Data Link Communications System Check

--