Content .. 99 100 101 102 ..

Dodge Dakota (R1). Manual - part 101

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Inspect the Right Front Wheel Speed Sensor and Connector.
Is the Sensor or Connector Damaged?

All

Yes

→

Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.

→

Go To

Turn the ignition off.
Inspect the Tone Wheel for damaged or missing teeth, cracks, or looseness.
Note: The Tone Wheel Teeth should be perfectly square, not bent or nicked.
Is the Tone Wheel OK?

All

Yes

→

Go To

→

Replace the Tone Wheel.
Perform ABS VERIFICATION TEST - VER 1.

Turn the ignition off.
Using a Feeler Gauge, measure the Wheel Speed Sensor Air Gap.
NOTE: The Air Gap should be checked in at least four places on the Tone
Wheel.
Is the Air Gap between 0.42 mm - 1.71 mm (0.017

9 - 0.0689) ?

All

Yes

→

Go To

→

Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.

Turn the ignition off.
Disconnect the CAB harness connector C2.
Set up a voltmeter to measure AC voltage on the Right Front Wheel Speed Sensor
Signal Circuits at the CAB connector.
Raise the right front wheel off the ground.
Spin the wheel by hand at the rate of at least 1.0 rev/sec.
Measure the AC voltage on the Right Front Wheel Speed Sensor (+) and (-) Signal
Circuits.
Does the voltage go above 408 mV (2WD) or 460 mV (4WD) as the wheel is rotated?

All

Yes

→

Replace the Controller Antilock Brake in accordance with the
Service Information. Refer to the symptom *Replacing the Con-
troller Antilock Brake for additional information.
Perform ABS VERIFICATION TEST - VER 1.

→

Replace the Right Front Wheel Speed Sensor.
Perform ABS VERIFICATION TEST - VER 1.

Turn the ignition off.
Visually inspect wheel speed sensor.
Visually inspect tone wheel.
Visually inspect wiring harness.
Visually inspect brakes for locking up due to lining contamination or overheating.
Inspect all Components for defects which may cause a Signal DTC to set.
Is any Component Damaged?

All

Yes

→

Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.

→

Test Complete.

BRAKES (CAB)

INTERMITTENT SIGNAL FROM RIGHT FRONT SENSOR —

Continued

Symptom List:

INTERNAL CAB FAULT
INTERNAL MAIN RELAY

Test Note:

All symptoms listed above are diagnosed using the same tests.

The title for the tests will be INTERNAL CAB FAULT.

When Monitored and Set Condition:

INTERNAL CAB FAULT

When Monitored:

Ignition on. The CAB monitors the Fused B(+) circuit at all times for

proper system voltage.

Set Condition:

If the Fused B(+) voltage is missing when the CAB detects that an internal

main driver is not

9on9, the Diagnostic Trouble Code (DTC) is set.

INTERNAL MAIN RELAY

When Monitored:

Vehicle speed above 6 km/h (4 mph) for 2 seconds.

Set Condition:

Low feedback voltage from the Brake Pressure Switch Sense circuit. The

above criteria satisfied for 255 consecutive checks spaced 5 milliseconds apart (1.3 seconds
total).

POSSIBLE CAUSES

CONNECTOR CONCERN

INTERMITTENT DTC

BLOWN FUSE - FUSED B(+) CIRCUIT

NO B+ SUPPLY TO FUSE

FUSED B(+) CIRCUIT OPEN

B(+) CIRCUIT INTERMITTENTLY SHORTED TO GROUND

B(+) CIRCUIT SHORTED TO GROUND

CAB - FUSED B(+) CIRCUIT OPEN

CAB - FUSED B(+) CIRCUIT SHORTED TO GROUND

BRAKES (CAB)

TEST

ACTION

APPLICABILITY

Turn the ignition on.
With the DRBIII

t, erase DTC’s.

Turn the ignition off.
Turn the ignition on.
Drive the vehicle above 25 km/h (15 mph) for at least 10 seconds.
Stop the vehicle.
With the DRBIII

t, read DTC’s.

Does the DRBIII

t display CAB Power Feed Circuit DTC present right now?

All

Yes

→

Go To

→

Go To

Turn the ignition off.
On EBC 2 systems, inspect the HCU-to-CAB connector for disconnect, pin damage,
corrosion etc.
Inspect the CAB harness connectors for broken, bent, pushed out, or corroded
terminals.
Were any problems found?

All

Yes

→

Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.

→

Go To

Turn the ignition off.
Remove and Inspect the ABS Fuse 3 in the Junction Block.
Is the Fuse blown?

All

Yes

→

Go To

→

Go To

Turn the ignition off.
Visually inspect the B(+) Circuit in the wiring harness from the Junction Block to the
CAB. Look for any sign of an intermittent short to ground.
Is the wiring harness OK?

All

Yes

→

Go To

→

Repair the Fused B(+) Circuit Shorted to Ground.
Perform ABS VERIFICATION TEST - VER 1.

Turn the ignition off.
Remove the ABS Fuse 3 from the Junction Block.
Disconnect the CAB harness connector C1.
Note: Check connector - Clean/repair as necessary.
Using a test light connected to 12 volts, probe the Fused B(+) Circuit.
Is the test light on?

All

Yes

→

Repair the Fused B(+) Circuit Shorted to Ground.
Perform ABS VERIFICATION TEST - VER 1.

→

Go To

BRAKES (CAB)

INTERNAL CAB FAULT —

Continued

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Remove the ABS Fuse 3 from the Junction Block.
The CAB must be connected for the results of this test to be valid.
Using a test light connected to 12 volts, probe the Fused B(+) Circuit at the Junction
Block fuse 3 terminal.
Is the test light on?

All

Yes

→

Go To

Turn the ignition off.
If there are no potential causes remaining, view repair.

All

Repair

Replace the Fuse.
Perform ABS VERIFICATION TEST - VER 1.

Remove the ABS Fuse 3 from the Junction Block.
Turn the ignition on.
Measure the voltage of the Fused B+ supply to Fuse 3 in the Junction Block.
Is the voltage above 10 volts?

All

Yes

→

Go To

→

Repair the B+ Supply circuit for an open.
Perform ABS VERIFICATION TEST - VER 1.

Turn the ignition off.
Remove the ABS Fuse 3 from the Junction Block.
Disconnect the CAB harness connector C1.
Note: Check connector - Clean/repair as necessary.
Measure the resistance of the Fused B(+) circuit between Junction Block Fuse
terminal 3 and the CAB connector.
Is the resistance below 5 ohms?

All

Yes

→

Go To

→

Repair Fused B(+) Circuit Open.
Perform ABS VERIFICATION TEST - VER 1.

If there are no potential causes remaining, view repair.

All

Repair

BRAKES (CAB)

INTERNAL CAB FAULT —

Continued

Content .. 99 100 101 102 ..