Automatic Transmission Using Voltmeter
- Ensure ignition is off. Connect analog voltmeter negative lead to Data Link Connector (DLC) ground terminal and positive lead to terminal No. 6. See Figure .
- If trouble codes are stored in TCL module memory, voltmeter needle will begin to pulse. Long pulses represent tens; short pulses represent ones. For example, 4 long pulses and 3 short pulses indicate Code 43. If 2 or more codes are stored, lowest number will be displayed first.
- After recording trouble code(s), perform necessary testing. See the TRANSMISSION SERVICING article. If no codes are stored, voltmeter needle will pulse constantly.