940 L4-2320cc 2.3L SOHC VIN 83 B230FD (1993)
Removing Protective Sleeve
5.
Remove connector protective sleeve and reinstall fuse #1 for testing.
CAUTION:^ Never check connections from the front. Connectors can get damaged and worsen the problem.
^ Check connections through the holes in the connector.
^ Connection pin numbers are printed on the connector side.
Checking Pins# 6 And 7
6.
Check air mass meter by connecting an ohmmeter between ECU connector pins 6 and 7.
Reading: 2.5 - 4.0 ohms
a. If reading is incorrect, replace air mass meter and retest.
b. If reading is correct, continue with next steps.
Checking Pin# 9
7.
To check the system relay (located in central electric unit behind ash tray), connect a voltmeter between ground and ECU connector pin 9.
8.
Connect a lead between ground and ECU connector pin 21. The relay should now close and the voltmeter should show:
Reading: approx. 12 volts
If reading is no or low voltage, check fuse #1 (located in central electric unit behind ash tray), battery, wiring to battery and connectors.