Dodge Ram Truck 1500-2500-3500. Manual — part 17

C143F-STABILIZER SELECT SWITCH CIRCUIT HIGH (CONTINUED)

5.

(T531) STABILIZER BAR SWITCH SENSE CIRCUIT OPEN

Measure the resistance of the (T531) Stabilizer Bar Switch Sense cir-
cuit between the Disconnecting Stabilizer Bar Switch and the FDCM
harness connectors.

Is the resistance below 5.0 ohms?

Yes

>> Replace the FDCM in accordance with the Service Infor-

mation.

Perform FDCM VERIFICATION TEST.

No

>> Repair the open in the (T531) Stabilizer Bar Switch Sense

circuit.

Perform FDCM VERIFICATION TEST.

6.

INTERMITTENT WIRING AND CONNECTORS

The conditions necessary to set this DTC are not present at this time.

Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.

Wiggle test the wiring harness and connectors while checking for shorted and open circuits.

Using the DRBIII

T

, monitor the data related to this circuit while performing the wiggle test. Look for the data to

change or for the DTC to reset.

While monitoring the Stabilizer Bar State on the DRBIII

T

, move the switch to each position. The DRBIII

T

display

must match the position on the actual switch.

Were there any problems found?

Yes

>> Repair as necessary.

Perform FDCM VERIFICATION TEST.

No

>> Test Complete.

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ACTIVE CHASSIS - ELECTRICAL DIAGNOSTICS

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C2124-STABILIZER BAR INDICATOR CONTROL CIRCUIT

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ACTIVE CHASSIS - ELECTRICAL DIAGNOSTICS

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C2124-STABILIZER BAR INDICATOR CONTROL CIRCUIT (CONTINUED)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
Ignition on.

•

Set Condition:
The FDCM has detected a short to voltage, ground or an open in the Stabilizer Bar Disengage or Engage
Illumination Sense circuits.

Possible Causes

DISCONNECTING STABILIZER SWITCH

(T539) STABILIZER BAR DISENGAGE ILLUMINATION SENSE SHORT TO VOLTAGE

(T539) STABILIZER BAR DISENGAGE ILLUMINATION SENSE SHORT TO GROUND

(T539) STABILIZER BAR DISENGAGE ILLUMINATION SENSE OPEN

(T529) STABILIZER BAR ENGAGE ILLUMINATION SENSE SHRORT VOLTAGE

(T529) STABILIZER BAR ENGAGE ILLUMINATION SENSE SHRORT GROUND

(T529) STABILIZER BAR ENGAGE ILLUMINATION SENSE OPEN

FDCM

1.

DTC ACTIVE

CAUTION: Before removing the FDCM harness connector, clean the connector and locking cam area of dirt
and debris. Failure to do so can result in the connector being jammed or damage to the locking cams on
the harness connector or module. Do not force the assist arm when releasing or installing the harness con-
nector.

NOTE: If set along with this DTC, diagnostic any Locker/Differential Indicator Control Circuit DTC(s) first
before continuing.
Turn the ignition on, engine not running

With the DRBIII

T

, read FDCM DTC(s).

Is the DTC active at this time?

Yes

>> Go To 2

No

>> Go To 11

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ACTIVE CHASSIS - ELECTRICAL DIAGNOSTICS

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C2124-STABILIZER BAR INDICATOR CONTROL CIRCUIT (CONTINUED)

2.

(T530) STABILIZER BAR DISENGAGE ILLUMINATION SENSE OPERATION

NOTE: Before continuing with the below diagnostic test, ensure
the FDCM harness connector seal is installed correctly. Inspect
the terminals on both harness connector and the module for
damage. Failure to do so can result in misdiagnoses of the sys-
tem.
Turn the ignition off.

Disconnect the Disconnecting Stabilizer Bar Switch harness connector.

Using a 12–volt test light connected to battery voltage, probe the
(T530) Stabilizer Bar Disengage Illumination Sense circuit.

Turn the ignition on.

With the DRBIII

T

, actuate the Stabilizer Bar Disengage Illumination

Sense circuit.

Does the test light illuminate and flash on and off?

Yes

>> Go to 3

No

>> Go To 4

Perform FDCM VERIFICATION TEST.

3.

(T529) STABILIZER BAR ENGAGE ILLUMINATION SENSE OPERATION

Probe the Stabilizer Bar Disengage Illumination Sense circuit with the
test light.

With the DRBIII

T

, actuate the (T529) Stabilizer Bar Engage Illumina-

tion Sense circuit.

Does the test light illuminate and flash on and off?

Yes

>> Replace the Disconnecting Stabilizer Bar Switch.

Perform FDCM VERIFICATION TEST.

No

>> Go to 7

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ACTIVE CHASSIS - ELECTRICAL DIAGNOSTICS

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