940 L4-2320cc 2.3L SOHC VIN 83 B230FD (1993)
Checking Resistance At Oxygen Sensor (Lambda Sond) Heating Element
9.
Connect an ohmmeter between ground and terminal #1 (pink wire) at the two prong oxygen sensor connector.
a. With sensor cold (68°F or 20°C):
Reading: approx. 2 - 3 ohms
b. With sensor hot (over 660°F or 350°C which is the temperature of the sensor when the engine is hot during idle):
Reading: approx. 7 - 14 ohms
10.
If reading is correct, heating element is O.K., proceed with step 13.
If reading is incorrect, proceed with next step.
Checking Oxygen Sensor (Lambda Sond) Ground Connection
11.
Connect an ohmmeter between ground and terminal #2 (black wire) at the two prong oxygen sensor connector.
Reading: 0 ohm
a. If reading is correct, replace and retest with new oxygen sensor (lambda sond).
b. If reading is incorrect, repair wire or connector leading to ground and retest.
12.
Disconnect ground lead from pin 21 and ohmmeter.