Checking the TIP function
|
|
Checking the TIP function
|
|
Important
|
|
|
|
The following conditions must be fulfilled before activation of the TIP function in the
Cruise Control system control module will be possible:
|
|
Pin
A
(1): 0 V
|
|
Pin
B
(2): approx. 12 V
|
|
Pin
C
(3): approx. 12 V
|
|
|
|
1.
|
Connect the BOB and
check that about 12 V is present across terminals B and C of the Cruise Control connector
and a good ground. Also check that no voltage (0 V) is present across terminal A and a good
ground when the TIP button is held in the depressed position.
|
|
2.
|
If the voltage readings are not correct, check that about 12 V is present
across pin 7 of the switch connector and a good ground.
If the voltage is OK, continue with point 4.
|
|
3.
|
If the voltage is not OK, check the wiring for continuity or a short circuit
by measuring the resistance across the load side of the fuse and pin 7 of the switch
connector.
If the resistance is > 1 ohm, rectify the fault.
|
|
4.
|
Check the switch by holding it in the TIP position and measuring the
resistance across pins 7 and 9 and also across pins 7 and 10.
Hold the switch in the ON/OFF position and measure the resistance across pins 7
and 8.
If the resistance reading obtained during any measurement is > 1 ohm, fit a new
switch.
|
|
5.
|
If the resistance is > 1 ohm, check the wiring for continuity or a short
circuit by measuring the resistance across:
|
|
|
•
|
pin 10 of the switch connector and pin B (2) of the
Cruise Control connector.
|
|
|
•
|
pin 9 of the switch connector and pin C (3) of the Cruise Control connector.
|
|
|
•
|
pin 8 of the switch connector and pin A (1) of the Cruise Control connector. If the
resistance is > 1 ohm, check the wiring and rectify the fault.
|
|
6.
|
If it has not been possible to determine a fault using the above checks, continue
fault diagnosis with
.
|
