| Test | TECH 1 | Notes | Nominal Values | Possible |
|---|---|---|---|---|
| Step | Display | Trouble | ||
| No. | Codes | |||
| 22 | A/C COMPRESS.SW. | Ignition ON | INACTIVE 0 V | - |
| Engine idling | INACTIVE 0 V | |||
| On vehicles with AC | ACTIVE 12 V | |||
| actuate AC switch: | Compressor switches | |||
| on automatically |
Note: Before trouble-shooting make sure that the correct coding is present, - see Table 3 -.
Ter. 32 is installed in the wiring harness at the factory only on vehicles with AC.
Trouble-shooting: Nominal Value: Cause of Trouble:
(if nominal value not attained)
Vehicles without AC
· Remove control unit plug lead 0 V · Short circuit against voltage in
cover. Measure voltage at control unit to Ter. 32
Ter. 32 with multimeter
· Control unit defective
Vehicles with AC
· Remove control unit plug lead · Short to ground or interruption in
cover. Check voltage at lead from control unit Ter. 32 to
Ter. 32 with multimeter compressor (plug connection X7/Ter.D)
- AC OFF 0 V · Short to ground or lead interruption
- AC ON 12 V in wiring harness instrument panel, AC
Compressor switches on
· Control unit defective