Chrysler 1998 Voyager Service Manual page 101

NS
DIAGNOSIS AND TESTING (Continued)
(5) With the aid of a helper, apply pressure to the
brake pedal until a pressure of 6895 kPa (1000 psi) is
obtained on the proportioning valve inlet gauge.
Then based on the type of brake system the vehicle is
equipped with and the pressure specification shown
on the following table, compare the pressure reading
on the outlet gauge to the specification. If outlet
pressure at the proportioning valve is not within
specification when
obtained, replace the proportioning valve.
(6) Remove the pressure test fittings and pressure
gauges from the proportioning valve.
(7) Install the chassis brake lines in the correct
ports of the proportioning valve.
(8) Install the pressure test fittings and pressure
gauges in the opposite inlet and outlet port of the
height sensing proportioning valve. Repeat steps 4
and 5 for the other proportioning valve.
(9) Remove the pressure test fittings and pressure
gauges from the proportioning valve.
(10) Install the chassis brake lines in the correct
ports of the proportioning valve.
(11) Install the actuator (Fig. 22) on the height
sensing proportioning valve. Adjust the proportioning
valve actuator. See Height Sensing Proportioning
Valve in the Adjustment Section in this group of the
service manual for the adjustment procedure.
(12) Bleed both rear hydraulic circuits at the rear
brakes.
(13) Road test vehicle.
BRAKE FLUID CONTAMINATION
Indications of fluid contamination are swollen or deteri-
orated rubber parts.
Swollen rubber parts indicate the presence of
petroleum in the brake fluid.
WHEEL DRIVE
SALES CODE
BASE TRAIN
SWB FWD BRA+BGF
BRA+BGF
SWB FWD BRB+BGF
BRV+BGF
LWB FWD BRA+BGF
BRA+BGF
LWB FWD BRB+BGF
BRV+BGF
SWB AWD BRE+BGF
LWB AWD BRE+BGF
required inlet pressure
BRAKE SYS-
TEM
14 DISC/DRUM
W/O ANTILOCK
14 ,15 ,15 HD
DISC/DRUM
WITH ANTILOCK
14 DISC/DRUM
W/O ANTILOCK
14 ,15 ,15 HD
DISC/DRUM
WITH ANTILOCK
15 DISC/DISC
WITH ANTILOCK
15 DISC/DISC
WITH ANTILOCK
To test for contamination, put a small amount of
drained brake fluid in clear glass jar. If fluid sepa-
rates into layers, there is mineral oil or other fluid
contamination of the brake fluid.
If brake fluid is contaminated, drain and thor-
oughly flush system. Replace master cylinder, propor-
tioning valve, caliper seals, wheel cylinder seals,
Antilock Brakes hydraulic unit and all hydraulic
is fluid hoses.
RED BRAKE WARNING LAMP TEST
For diagnosis of specific problems with the red
brake warning lamp system, refer to Brake System
Diagnostics Chart 2, located in the Diagnosis And
Testing section in this group of the service manual.
TRACTION CONTROL LAMP TEST
The traction control light is tested by cycling the
traction control switch on and off. The traction con-
trol switch used on this vehicle is a momentary con-
tact type switch. The test procedure for the traction
control light is performed as follows: Press the trac-
tion control switch once and the "Trac Off" lamp will
illuminate. With the "Trac Off" lamp illuminated,
press the traction control switch again and the "Trac
Off" lamp will turn off.
If the traction control lamp does not function as
described in the test above, diagnosis of the traction
control switch, lamp, wiring and other related compo-
nents of the traction control system is required.
STOP LAMP SWITCH TEST PROCEDURE
The required procedure for testing the stop lamp
switch is covered in Group 8H, Vehicle Speed Control
System in this service manual. The electrical circuit
tests for stop lamps is covered in Group 8W Rear-
Lighting in this service manual.
SPLIT POINT SLOPE
VAR. .30
25 BAR .59
VAR. .30
25 BAR .59
25 BAR .36
41 BAR .36
BRAKES
OUTLET
INLET PRES-
PRESSURE
SURE PSI
PSI
1000 PSI 250-350 PSI
660-780
1000 PSI
1000 PSI 250-350 PSI
1000 PSI 660-780 PSI
1000 PSI 525-640 PSI
1000 PSI 690-800 PSI
5 - 19
PSI