|
No.
|
TECH 1 Display
|
Conditions for
Checking
|
Nominal Value
|
Trouble Codes
|
Terminal
|
|
42
|
SWITCHED
|
Ignition ON
|
|
-
|
INTERN.
|
|
|
AERIAL
|
Radio OFF
|
INACTIVE 0V
|
|
|
|
|
|
Radio ON
|
ACTIVE 12V
|
|
|
|
|
|
Carry out F5:ACTUATOR TEST according to table 5,
no. 01 RADIO BUS TEST.
|
|
|
|
|
|
|
|
|
|
|
|
Notes for Trouble-shooting:
|
Nominal Value:
|
Cause of Fault:
(If nominal value is not attained)
|
|
· Ignition OFF
|
|
|
|
· Remove radio H1
|
|
|
|
· Ignition ON
|
INACTIVE 0V
|
If nominal value is attained and
TECH 1 displayed ACTIVE with radio OFF:
|
|
|
|
· Radio defective
|
|
· Release and disconnect 2-pin
|
INACTIVE 0V
|
If nominal
value is attained:
|
|
wiring
harness plug from antenna amplifier U18
|
|
· Antenna amplifier U18 defective
|
|
|
|
|
|
· Connect wiring harness plug to antenna
amplifier U18 again
|
|
|
|
|
|
|
|
· Disconnect telephone (if present)
|
INACTIVE 0V
|
If nominal
value is attained:
|
|
|
|
· Telephone defective
|
|
· Disconnect CD changer (if present)
|
INACTIVE 0V
|
If nominal
value is attained:
|
|
|
|
· CD changer defective
|
|
· Ignition OFF
|
|
|
|
· Remove instrument assembly
|
|
|
|
· Release and disconnect 26-pin MID
wiring harness plug
|
|
|
|
· Ignition ON
|
|
|
|
· At 26-pin MID wiring harness plug
Ter. 8:
|
|
|
|
measure
voltage to ground:
|
lower than 0.5 V
|
|
|
measure
resistance to ground:
|
higher than 20 kW
|
· Lead from 26-pin MID wiring harness
plug Ter. 8 to radio plug Ter. 7 has short circuit to + battery voltage or to
ground
|
|
· Connect radio plug Ter. 7 to ground
|
|
|
|
· Measure resistance to ground at 26-pin
MID wiring harness plug Ter. 8:
|
lower than 2 W
|
· Lead from 26-pin MID wiring harness
plug Ter. 8 to radio plug Ter. 7 is interrupted
|
|
|
|
If nominal
values are attained:
|
|
|
|
· MID defective
|
|
|
|
|
|
|
|
|
|
|
|
