Acura NSX 1991 Manual page 528

Main Menu
ALB Checker
Function Test (cont'd)
4. Turn the Mode Selector switch further to "2".
5. Depress the brake pedal firmly and push the Start
Test switch
The ABS indicator light should not go on while the
Test in Progress light is ON. There should be
kickback on the brake pedal. If not as described, go
to troubleshooting, page
NOTE: The operation sequence simulated lby
Modes 2, 3, 4 and 5:
About 30 seconds
START
6. Turn the Mode Selector switch to 3, 4 and 5.
Perform step 5 for each of the test mode positions.
Mode 1:
Sends the simulated driving signal O mph (O km/h)
– > 113 mph (180 km/h) – > O mph (O km/h) of each
wheel to the ABS control unit. There should be NO
kickback.
Mode 2:
Sends the driving signal of each wheel, then sends
the lock signal of the rear left wheel to the ABS
control unit. There should be kickback.
Mode 3:
Sends the driving signal of each wheel, then sends
the lock signal of the rear right wheel to the ABS
control unit. There should be kickback.
Mode 4:
Sends the driving signal of each wheel, then sends
the lock signal of the front left wheel to the ABS
control unit. There should be kickback.
Table of Contents
19-44 ('91-'92) ('93-'96).
END
Mode 5:
Sends the driving signal of each wheel, then sends
the lock signal of the front right wheel to the ABS
control unit. There should be kickback.
NOTE: If little or no kickback is felt from the brake
pedal in modes 2 – 5, repeat the function test of
modes 1–5 several times before beginning to
troubleshoot other parts of the system.
Mode 6:
Not used on this model.
Inspection points:
1. The ABS indicator light goes ON in mode 1.
Check for DTCs, and refer to the appropriate
troubleshooting.
If ABS indicator light goes on 120 seconds later
but the pump motor stops, refer to page 19-47.
2. There is no kickback in modes 2 through 5.
Faulty pressure switch (remains closed)
Shorted wires
Faulty or disconnected pump motor connector
Faulty pump motor relay
3. Weak kickback in modes 2 through 5.
Bleed high pressure circuits.
4. Pump motor stops in mode 1, but it does not stop
and there is no kickback in modes 2 through 5.
Brake fluid leakage
Bleed power unit
Clogged power unit outlet
Clogged or deteriorated power unit hose