TEST
ACTION
APPLICABILITY
8
Turn the ignition off.
Disconnect Pump Motor Connector.
Connect a 10 gauge jumper wire between pump motor Fused B (+) circuit and a 40
Amp Fused B (+) circuit.
Connect a 10 gauge jumper wire between pump motor ground circuit and a known
good body ground.
Monitor Pump Motor operation.
Is the pump motor running?
All
Yes
→
Go To
9
No
→
Replace the ABS Pump Motor/Hydraulic Control Unit assembly.
Perform ABS VERIFICATION TEST - VER 1.
9
Turn the ignition off.
Remove the ABS PUMP Fuse #12 from the Power Distribution Center (PDC).
Disconnect the CAB connector.
Note: Check connector - Clean/repair as necessary.
Measure the resistance of the Fused B (+) circuit between the PDC Fuse Terminal
and the CAB connector.
Is the resistance below 10 ohms?
All
Yes
→
Go To
10
No
→
Repair the Fused B(+) circuit for an open.
Perform ABS VERIFICATION TEST - VER 1.
10
Turn the ignition off.
Disconnect CAB Connector.
Note: Check connector - Clean/repair as necessary.
Measure the resistance of the CAB ground circuits.
Is the resistance below 1.0 ohms?
All
Yes
→
Go To
11
No
→
Repair the ground circuit circuit for an open.
Perform ABS VERIFICATION TEST - VER 1.
11
Turn the ignition on.
With the DRBIII
t, enable pump motor actuation.
NOTE: Pump motor will not operate, but voltage will be applied.
Measure the voltage drop across the ABS ground circuit connection, with pump motor
actuation enabled.
Is the voltage below 0.1 volt?
All
Yes
→
Go To
12
No
→
Repair the Ground circuit for an open.
Perform ABS VERIFICATION TEST - VER 1.
12
If there are no potential causes remaining, view repair.
All
Repair
Replace the Controller Anti-Lock Brake in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
35
BRAKES (CAB)
PUMP MOTOR NOT WORKING PROPERLY —
Continued