Check Speedometer Signal; Automatic Transmission: Check Gear Selector Signal; Check Lambda-Sond Current Feed And Pre-Heating Resistance - Volvo 240 1989 Service Manual

Checks
34
BL
2~~
20:1
BL- GN
Fllel system LH2.4 - 240
E21
Check speedo meter signal
Remove panel under instrument panel on driverside.
Disconnect 12 terminal connector from speedome­
ter. Connect ohm meter between blue (BL) cable and
no .
34
connection on control unit connector. Reading
should be
0 U_
If fault code series 3-1-' has flashed and resistance
is 0 the speedometer signal is missing.
Reconnec! speedometer cable and remount panel
under instrument panel.
E22
Aut om atic transmission :
Check gear selector signal
Put gear selector in position N (Neutral). Connect
ohm meter between gro und and no. 30 connection on
conlrol unit conne clor. Re ading should be
0 U.
Move gear selecto r 10 position D (Drive). Reading
should be - resistance.
The reading should be 0 in all gears for vehicles with
manual lransmission.
E23
Check Lambda-sand current feed and p r e- heat­
Ing re sistance
1.
Ground connections 20 and 21 on control unit con­
nector in order to slart fuel pumps.
47