Digital Diesel Electronics DDE 2.1 F0:DATA LIST
| No. | TECH 1-DISPLAY | Conditions for Checking | Nominal Value | Trouble Codes | Terminal |
|---|---|---|---|---|---|
| 13 | A/C INFORMAT. SW | Vehicles with AC: | - | 44, 16 | |
| Engine running at idle speed, operating | |||||
| temperature (AC switched off) | INACTIVE | ||||
| 0V | |||||
| Actuate AC switch | |||||
| (AC switched on) | ACTIVE 12V | ||||
| Vehicles without AC: | INACTIVE | ||||
| 0V | |||||
| Trouble-shooting | Nominal Value | Cause of Fault: |
(If nominal value is not attained)
· Disconnect wiring harness plug from pressure assy. switch S20
· Ignition ON
| · TECH 1 parameter A/C INFORMAT. SW | INACTIVE 0V | · Short circuit to voltage |
from: wiring harness plug for DDE control unit K70 Ter. 44
to: wiring harness plug for pressure assy. switch S20 Ter. 1
to: wiring harness plug for AC compressor speed relay K60 Ter. 8
· AC compressor speed relay K60 defective (see also test step 15 and Checking Procedures, Air Conditioning)
· DDE control unit K70 defective
· Bridge wiring harness plug for pressure assy. switch S20 with electrically fused jumper
from: wiring harness plug for pressure assy. switch S20 Ter. 1
to: battery positive terminal Ter. 30
| · TECH 1 parameter A/C INFORMAT. SW | ACTIVE 12V | · Short circuit to ground |
from: wiring harness plug for DDE control unit K70 Ter. 44
to: wiring harness plug for pressure assy. switch S20 Ter. 1
to: wiring harness plug for AC compressor speed relay K60 Ter. 8
| · Circuit interruption |
from: wiring harness plug for DDE control unit K70 Ter. 44
to: wiring harness plug for pressure assy. switch S20 Ter. 1
· AC compressor speed relay K60 defective (see also test step 15 and Checking Procedures, Air Conditioning)
· DDE control unit K70 defective
| If nominal values are attained | · Fault in air conditioning circuit (see Checking Procedures, Air Conditioning) |