GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 S10 - Electric 🢒 Body and Accessories 🢒 Data Link Communications 🢒 Scan Tool Inoperative

Step

Action

Value(s)

Yes

No

Tools Required

    • Scan Tool
    • J 35616-200 Test Lamp
    • J 39200 Digital Multimeter (DMM)
    • J 35616 Connector Test Adapter Kit

1

Was the Data Link Communications System Check performed?

--

Go to Step 2

Go to Diagnostic System Check - Data Link Communications

2
  1. Install a scan tool.
  2. Turn the ignition switch to RUN.
  3. Turn ON the scan tool.

Does the scan tool turn ON?

--

Go to Diagnostic System Check - Data Link Communications

Go to Step 3

3
  1. Turn ignition OFF.
  2. Disconnect the scan tool from the DLC.
  3. Test battery positive voltage CKT for voltage. Refer to Troubleshooting with a Test Lamp in Wiring Systems.

Did the test lamp light?

--

Go to Step 5

Go to Step 4

4

Repair open battery positive voltage CKT. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Diagnostic System Check - Data Link Communications

--

5

Test ground CKT cavities 4 and 5 for continuity to ground. Refer to Testing for Continuity in Wiring Systems.

Is the resistance within the specified value?

0-5 ohms

Go to Step 7

Go to Step 6

6

Repair open ground CKT(s). Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Diagnostic System Check - Data Link Communications

--

7
  1. Check connections at DLC. Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems.
  2. Scan tool may be malfunctioning. Refer to scan tool instruction manual. Try using a different scan tool.

Is the replacement complete?

--

Go to Diagnostic System Check - Data Link Communications

--