740 L4-2320cc 2.3L DOHC B234F (Can) (1992)
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Data Link Connector: Testing and Inspection
NB. Checking data link connector (DLC)
NB1
Checking LED
-
Ignition on.
-
Press the DLC button.
The LED should light when the button is down.
If the LED does not light
^ check battery power NB2.
If the LED lights
^ check the power supply from the control module NB4.
NB2
Checking the battery power
-
Ignition on.
Connect a voltmeter between terminal 4 in the connector and GND.
The voltmeter should read battery voltage.
If this value is OK
^ check the GND point NB3.
If the reading is incorrect
^ check the fuse and the wiring to it for breaks in accordance with NA2. See: Testing and Inspection/Component Tests and General Diagnostics/N.
Other Electrical Fault Tracing/NA. Checking the Wiring
NB3
Checking the GND point
-
Ignition off.
Connect an ohmmeter between terminal 8 in the connector and GND.
The ohmmeter should read approx. 0 ohms.
If this value is OK