Dodge Dakota (R1). Manual — part 105

Symptom:

REAR DUMP SOLENOID OPEN - EBC 2

When Monitored and Set Condition:

REAR DUMP SOLENOID OPEN - EBC 2

When Monitored:

ABS power relay closed. Valve command for the rear dump solenoid not

present (not trying to turn the valve on).

Set Condition:

Low feedback voltage from the low side of the solenoid and the when

monitored conditions have been satisfied for over 40 consecutive controller checks spaced
5 milliseconds (ms) apart.

POSSIBLE CAUSES

HCU 4-WAY HARNESS OR CONNECTOR DAMAGE

REAR DUMP SOLENOID OPEN

CAB-- INTERNAL FAULT

TEST

ACTION

APPLICABILITY

1

Turn the ignition off.
Disconnect the HCU harness connector.
Note: Check connectors - Clean/repair as necessary.
Inspect the HCU harness and connector for damage.
Is there any HCU connector, terminal or harness damage?

All

Yes

→

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

No

→

Go To

2

2

Turn the ignition off.
Disconnect the HCU harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance through the Rear Dump Valve Solenoid between Cavities B
and D.
Is the resistance between 1.0 and 2.0 ohms?

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.

No

→

Replace the Hydraulic Control Unit (HCU).
Perform ABS VERIFICATION TEST - VER 1.

39

BRAKES (CAB)

Symptom:

REAR DUMP SOLENOID SHORTED - EBC 2

When Monitored and Set Condition:

REAR DUMP SOLENOID SHORTED - EBC 2

When Monitored:

ABS power relay closed. Valve command for rear dump solenoid

present (trying to turn the valve on).

Set Condition:

High feedback voltage from the low side solenoid and the when monitored

conditions have been satisfied for over 200 milliseconds (ms).

POSSIBLE CAUSES

HCU 4-WAY HARNESS OR CONNECTOR DAMAGE

REAR DUMP SOLENOID SHORTED

CAB-- INTERNAL FAULT

TEST

ACTION

APPLICABILITY

1

Turn the ignition off.
Disconnect the HCU harness connector.
Note: Check connectors - Clean/repair as necessary.
Inspect the HCU harness and connector for damage.
Is there any HCU connector, terminal or harness damage?

All

Yes

→

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

No

→

Go To

2

2

Turn the ignition off.
Disconnect the HCU harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the Rear Dump Valve Control circuit.
Is the resistance below 5 ohms?

All

Yes

→

Replace the Hydraulic Control Unit (HCU).
Perform ABS VERIFICATION TEST - VER 1.

No

→

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.

40

BRAKES (CAB)

Symptom:

REAR ISOLATION SOLENOID OPEN - EBC 2

When Monitored and Set Condition:

REAR ISOLATION SOLENOID OPEN - EBC 2

When Monitored:

ABS power relay closed. Valve command for rear isolation solenoid not

present (not trying to turn the valve on).

Set Condition:

Low feedback voltage from the low side of the solenoid and the when

monitored conditions have been satisfied for over 40 consecutive controller checks spaced
5 milliseconds (ms) apart.

POSSIBLE CAUSES

HCU 4-WAY HARNESS OR CONNECTOR DAMAGE

REAR ISOLATION SOLENOID OPEN

CAB-- INTERNAL FAULT

TEST

ACTION

APPLICABILITY

1

Turn the ignition off.
Disconnect the HCU harness connector.
Note: Check connectors - Clean/repair as necessary.
Inspect the HCU harness and connector for damage.
Is there any HCU connector, terminal or harness damage?

All

Yes

→

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

No

→

Go To

2

2

Turn the ignition off.
Disconnect the HCU harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance through the Rear Isolation Valve Solenoid between Cavities
A and D.
Is the resistance between 2.5 and 5.0 ohms?

All

Yes

→

Test Complete.

No

→

Replace the Hydraulic Control Unit (HCU).
Perform ABS VERIFICATION TEST - VER 1.

41

BRAKES (CAB)

Symptom:

REAR ISOLATION SOLENOID SHORTED - EBC 2

When Monitored and Set Condition:

REAR ISOLATION SOLENOID SHORTED - EBC 2

When Monitored:

ABS power relay closed. Valve command for rear isolation solenoid

present (trying to turn the valve on).

Set Condition:

High feedback voltage from the low side solenoid and the when monitored

conditions have been satisfied for over 200 milliseconds (ms).

POSSIBLE CAUSES

HCU 4-WAY HARNESS OR CONNECTOR DAMAGE

REAR DUMP SOLENOID SHORTED

CAB-- INTERNAL FAULT

TEST

ACTION

APPLICABILITY

1

Turn the ignition off.
Disconnect the HCU harness connector.
Note: Check connectors - Clean/repair as necessary.
Inspect the HCU harness and connector for damage.
Is there any HCU connector, terminal or harness damage?

All

Yes

→

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

No

→

Go To

2

2

Turn the ignition off.
Disconnect the HCU harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the Rear Dump Valve Control circuit.
Is the resistance below 5 ohms?

All

Yes

→

Replace the Hydraulic Control Unit (HCU).
Perform ABS VERIFICATION TEST - VER 1.

No

→

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.

42

BRAKES (CAB)