|
No.
|
TECH 1 Display
|
Conditions for
Checking
|
Nominal Value
|
Trouble Codes
|
Terminal
|
|
|
25
|
A/C CUTOFF RELAY
|
Vehicles with AC:
Engine running at idle speed,
operating temperature AC switch ON
Note:
Vehicle interior should be
warm,set thermostat to "COLD", set ventilation to full load;
Compressor switches on
automatically;
In some vehicles it is necessary
to accelerate briefly or wait for a while until the compressor switches on;
|
INACTIVE 12V
AC operating
|
-
|
5,
35
|
|
|
|
|
Vehicle stationary
Selector lever in "N"
Engine running at idle speed
Depress accelerator pedal
briefly to full load stop (full throttle)
or
Vehicle on incline
Select "Winter
Program"
From a standstill, accelerate
with throttle valve aperture greater than 80 %
Vehicles without AC, always:
|
ACTIVE 0V
AC not operating
ACTIVE 0V
AC not operating
ACTIVE 0V
|
|
|
|
|
Trouble-shooting:
|
Nominal Value:
|
Cause of
Fault:
(If nominal
value is not attained)
|
|
|
· Ignition OFF
· Disconnect from
transmission control unit wiring harness plug
· Measure voltage:
from: transmission control unit wiring harness plug Ter. 5
to: ground, Ter. 31
|
less than 0.1
V
|
· Short circuit to voltage
from: transmission control unit wiring harness plug Ter. 5
to: relay K 90 Ter. 85
· Further causes of fault:
see Air Conditioning Checking Procedures, 01/93.
|
|
|
· Ignition ON
· Measure voltage:
from: transmission control unit wiring harness plug Ter. 5
to: ground, Ter. 31
|
greater than
11 V
|
· Short circuit to ground
from: transmission control unit wiring harness plug Ter. 5
to: relay K 90 Ter. 85
· Circuit interruption
from: transmission control unit wiring harness plug Ter. 5
to: relay K 90 Ter. 85
· Further causes of fault:
see Air Conditioning Checking Procedures, 01/93.
|
|
|
· Bridge transmission
control unit wirning harness plug:
from: transmission control unit wiring harness plug Ter. 5
to: ground, Ter. 31
|
Relay
K 90 switches |
· see Air Conditioning
Checking Procedures, 01/93.
|
|
|
|
If nominal
values are attained
|
· Transmission control unit
defective.
|
|
|
|
|
|
|
|
|
|
|
|
|
