|
No.
|
TECH 1-Display
|
Conditions
for Checking
|
Nominal
Value
|
Trouble
Codes
|
Terminal
|
|
07
|
SELECT
ACTUATOR A / C CUTOFF REL
|
Vehicles with AC and
compressor relay (K 60)
Notes on checking:
Carry out check 1 if engine
does not start; otherwise proceed directly with check 2.
Check 1:
|
|
87,
88
|
5,
19
|
|
|
|
Ignition ON
Engine OFF
AC switch ON
|
The AC cutoff relay switches
alternately
INACTIVE 12 V
ACTIVE 0 V
|
|
|
|
|
|
Press key F5 in the system
main menu, select the desired test using the arrow keys and confirm with YES.
Follow the instructions in the
TECH 1 display.
|
Noise check:
clicking noise from AC clutch
|
|
|
|
|
|
Note:
After this check is started, the
AC cutoff relay is actuated at a frequency of 0.5 Hz.
The check is completed after a
maximum of 30 s.
|
|
|
|
|
|
|
Check 2:
Engine running at idle speed
AC switch ON
Press key F5 in the system
main menu, select the desired test using the arrow keys and confirm with YES.
Follow the instructions in the
TECH 1 display.
|
The AC cutoff relay
switches alternately
INACTIVE 12 V
ACTIVE 0 V
AC compressor switches ON and OFF
|
|
|
|
Notes on Trouble - shooting:
|
Nominal Value:
|
Cause of Fault:
|
|
· Ignition
OFF
· Disconnect
AC cutoff relay
· Disconnect
control unit K 61 from wiring harness
· Check
from AC cutoff unit relay base K 60 / Ter. 6 to control unit
K 61 / Ter. 25 for passage
|
approx. 0 W
|
· Short
circuit or lead interruption from control unit K 61 / Ter. 25
to AC cutoff relay base K 60 / Ter. 6
|
|
Nominal values are attained
|
|
· AC
cutoff relay K 60 defective
· Air
conditioning defective
· Control
unit K 61 defective
|
|
|
|
|
|
|
|
|
|
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|
