Test 4A Fluid Level Switch Not Processable
NOTE:
For connector terminal identification, refer to CONNECTOR IDENTIFICATION
. For wiring diagram, see WIRING DIAGRAM
.
- Check CAB for correct application. See Figure . On models without LTCS, CAB has White part label. On models equipped with LTCS, CAB has Blue part label. If vehicle is not equipped with correct CAB, replace CAB. Perform VER-1A SYSTEM VERIFICATION TEST . If vehicle is equipped with correct CAB, go to next step.
- Using DRB-II, read FLS SW #2 input. Disconnect brake fluid level switch No. 2 connector. See Figure . If DRB-II displays CLOSED, go to step 6). If DRB-II displays OPEN, go to next step.
- Turn ignition off. Disconnect CAB 37-pin connector. Put DRB-II in ohmmeter mode. Using DRB-II, check resistance of CAB connector terminal No. 35 (Dark Blue/White wire). See Figure . If resistance is more than 5 ohms, repair short to ground in Dark Blue/White wire. Perform VER-1A SYSTEM VERIFICATION TEST . If resistance is less than 5 ohms, and vehicle is not equipped with LTCS, replace CAB. Perform VER-1A SYSTEM VERIFICATION TEST . If vehicle is equipped with LTCS, go to next step.
- Disconnect CAB from HCU. See Fig 1 . Inspect 14-pin connection terminals at CAB and valve block assembly. If connector is faulty, repair as necessary. Perform VER-1A SYSTEM VERIFICATION TEST . If valve block assembly terminals are backed-out, replace HCU. Perform VER-1A SYSTEM VERIFICATION TEST . If connector and terminals are okay, go to next step.
- Using an external ohmmeter, check resistance between CAB 14-pin terminal No. 8 and CAB 37-pin connector terminal No.17. See Fig 2 . If resistance is less than 5 ohms, replace HCU. Perform VER-1A SYSTEM VERIFICATION TEST . If resistance is more than 5 ohms, replace CAB. Perform VER-1A SYSTEM VERIFICATION TEST .
- Turn ignition off. Disconnect CAB 37-pin connector. Put DRB-II in ohmmeter mode. Using DRB-II, check resistance of CAB connector terminal No. 17 (Dark Green/White wire). If resistance is less than 5 ohms, repair short to ground in Dark Green/White wire. Perform VER-1A SYSTEM VERIFICATION TEST . If resistance is more than 5 ohms, go to next step.
- Disconnect CAB from HCU. See Fig 1 . Inspect 14-pin connection terminals at CAB and valve block assembly terminals. If connector is faulty, repair as necessary. Perform VER-1A SYSTEM VERIFICATION TEST . If valve block assembly terminals are backed-out, replace HCU. Perform VER-1A SYSTEM VERIFICATION TEST . If connector and terminals are okay, go to next step.
- Using an external ohmmeter, check resistance between CAB 14-pin connection terminal No. 8 and CAB 37-pin connector terminal No.17. See Fig 2 . If resistance is less than 5 ohms, replace HCU. Perform VER-1A SYSTEM VERIFICATION TEST . If resistance is more than 5 ohms, replace CAB. Perform VER-1A SYSTEM VERIFICATION TEST .