Did you perform the Data Link Communications Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Data Link Communications

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?

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Go to Step 4

Go to Step 3

The scan tool may be malfunctioning. Refer to the scan tool instruction manual in order to ensure that the scan tool is functioning.

Does the scan tool operate properly?

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Go to Step  37

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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?

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Go to Step 6

Go to Step 5

Repair the terminal contact at the DLC.

Is the repair complete?

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Go to Step  37

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Turn the ignition switch to RUN with the engine off.

Does the scan tool turn ON?

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Go to Step 12

Go to Step 7

Measure the voltage between DLC terminal 1.

Is the voltage within the specified range?

10-15 V

Go to Step 9

Go to Step 8

Repair the open or short to ground in CKT 1140 (ORN).

Is the repair complete?

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Go to Step  37

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Measure the voltage from the DLC terminal 16 to 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 351 (BLK/WHT).

Is the repair complete?

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Go to Step  37

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Repair the open in CKT 350 (BLK).

Is the repair complete?

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Go to Step  37

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Measure the voltage from the DLC terminal 14 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 15

Go to Step 13

Measure the resistance from the DLC terminal 14 to ground.

Is the resistance within the specified value?

0-5 ohms

Go to Step 26

Go to Step 14

Repair the open in CKT 835 (DK GRN).

Is the repair complete?

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Go to Step  37

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1. Disconnect the compact disc (CD) changer.
2. Measure the voltage from the DLC terminal 14 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 17

Go to Step 16

Replace the compact disc changer. Refer to Remote CD Changer Replacement in Entertainment.

Is the repair complete?

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Go to Step  37

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1. Disconnect the radio.
2. Measure the voltage from the DLC terminal 14 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 19

Go to Step 18

Replace the radio. Refer to Radio Replacement in Entertainment.

Is the repair complete?

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Go to Step  37

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1. Disconnect the heater and A/C programmer.
2. Measure the voltage from the DLC terminal 14 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 21

Go to Step 20

Replace the heater and A/C programmer. Refer to Programmer Replacement in HVAC--System Automatic.

Is the repair complete?

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Go to Step  37

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1. Disconnect IP junction block C4.
2. Measure the voltage from the DLC terminal 14 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 23

Go to Step 22

Repair the short to battery positive voltage (B+) in CKT 835 (DK GRN) between IP junction block connector C4 terminal F8 and compact disc (CD) changer connector terminal 10.

Is the repair complete?

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Go to Step  37

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1. Disconnect IP junction block C1.
2. Measure the voltage from the DLC terminal 14 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 25

Go to Step 24

Repair the short to battery positive voltage (B+) in CKT 835 (DK GRN) between IP junction block connector C1 terminal E5 and radio terminal E1 or heater and A/C programmer terminal C4.

Is the repair complete?

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Go to Step  37

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Repair the short to battery positive voltage (B+) in CKT 835 (DK GRN) between IP junction block connector C1 terminal F5 and the DLC connector terminal 14.

Is the repair complete?

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Go to Step  37

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1. Disconnect the compact disc (CD) changer.
2. Measure the resistance from the DLC terminal 14 to ground.

Is the resistance within the specified value?

0-5 ohms

Go to Step 28

Go to Step 27

Replace the compact disc (CD) changer. Refer to Remote CD Changer Replacement in Entertainment.

Is the repair complete?

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Go to Step  37

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1. Disconnect the radio.
2. Measure the resistance from the DLC terminal 14 to ground.

Is the resistance within the specified value?

0-5 ohms

Go to Step 30

Go to Step 29

Replace the radio. Refer to Radio Replacement in Entertainment.

Is the repair complete?

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Go to Step  37

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1. Disconnect the heater and A/C programmer.
2. Measure the resistance from the DLC terminal 14 to ground.

Is the resistance within the specified value?

0-5 ohms

Go to Step 32

Go to Step 31

Replace the heater and A/C programmer. Refer to Programmer Replacement in HVAC--System Automatic.

Is the repair complete?

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Go to Step  37

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1. Disconnect IP junction block C4
2. Measure the resistance from the DLC terminal 14 to ground.

Is the resistance within the specified value?

0-5 ohms

Go to Step 34

Go to Step 33

Repair the short to ground in CKT 835 (DK GRN) between the IP junction block connector C4 terminal F8 and compact disc (CD) changer terminal 10.

Is the repair complete?

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Go to Step  37

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1. Disconnect IP junction block C1.
2. Measure the resistance from the DLC terminal 14 to ground.

Is the resistance within the specified value?

0-5 ohms

Go to Step 36

Go to Step 35

Repair the short to ground in CKT 835 (DK GRN) between the IP junction block connector C1 terminal E5 and the radio terminal E1 or the heater and A/C programmer terminal C4.

Is the repair complete?

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Go to Step  37

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Repair the short to ground in CKT 835 (DK GRN) between the IP junction block connector C1 terminal F5 and the DLC connector terminal 14.

Is the repair complete?

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Go to Step  37

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1. Turn the ignition switch OFF.
2. Reconnect or install any connectors or components that were disconnected or removed.
3. Turn the ignition switch ON.
4. Clear any DTCs.

Is the repair complete?

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Go to Diagnostic System Check - Data Link Communications

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