940 L4-2320cc 2.3L DOHC VIN 89 B234F FI (1991)
Checking Diagnostic Socket Ground
16.
Connect ohmmeter between black wire and ground.
Reading: approx. 0 ohm
Checking Diagnostic Socket Wire
17.
Connect the ohmmeter between selector cable and pin #8 (selector button) under diagnostic socket.
a. Reading: infinite
b. When the button is depressed;
Reading: 0 ohm
Checking Diagnostic Socket Diode
18.
Connect a diode tester between the diagnostic socket diode and the selector wire. Tester red (+) lead connects under diode, black (-) lead connects
to the selector wire.
19.
If a reading is obtained, diode is operating correctly.
20.
If diagnostic socket fails any test between step 13 and 16, check wiring and connectors. Replace as needed.
21.
If the socket fails test 17 to 19, replace diagnostic socket and retest.
22.
Disconnect the test equipment. Remove the #1 fuse and reconnect the ECU and all other connectors, install the kick panel and glove compartment.
Ensure that the rubber seal in the ECU connector is installed before it is connected to the unit.
23.
Reinstall the #1 fuse.
