Test 26 - 30
TEST 26Inlet and outlet valve function
Bridge ABS module terminals 1,21 and 38
Ignition OFF, apply and hold foot brake
- RH front wheel should be locked
Switch ignition ON
- Wheel must now rotate
- Brake pedal must not go to the floor
If an incorrect result is obtained
- Renew valve block
- Check electric / hydraulic interconnection
TEST 27
Inlet and outlet valve function
Bridge ABS module terminals 1,36 and 54
Ignition OFF, apply and hold foot brake
- Both rear wheels should be locked
Switch ignition ON
- Road wheels must now rotate
- Brake pedal must not go to the floor
If an incorrect result is obtained
- Renew valve block
- Check electric/hydraulic interconnection
TEST 28
Fluid level warning indicator and pressure warning switch continuity
Connect continuity tester to ABS terminals 8 and 51
Switch ignition ON and wait for pump to stop running
Switch ignition OFF
^ Should have continuity
If incorrect:
- Disconnect reservoir plug, check for continuity between reservoir pins 1 and 2
- Disconnect pressure warning switch
- Check plug for continuity between Pressure warning switch pins 3 and 5
- Check fluid level
- Check wiring between terminals 8 and 51
TEST 29
Pressure warning switch operation
With the ignition switched OFF, pump the brake pedal 20 times until the pedal becomes hard
Connect continuity test to ABS terminals 8 and 51
^ Should be no continuity at pins 1 and 2 of fluid level reservoir switch
If incorrect:
- Check for NO continuity at pins 3 and 5 of pressure warning switch
- If continuity exists, renew pressure switch
TEST 30
Ground short to pressure warning switch, fluid level switch circuit.
Ohm-meter connected to ABS module connector terminals 8 and 1; then 51 and 1.
^ Should be no continuity
If incorrect:
- Check pressure warning and fluid level switches, wiring between switches and ABS connectors 8 and 51, and switches themselves for ground short.