Dodge Nitro. Manual — part 218

When Monitored:

Continuously, with ignition on.

Set Condition:

If the Anti-Lock Brakes Module detects bus messages from the Engine Control Module (ECM) or
Powertrain Control Module (PCM) are of improper data length.

Diagnostic Test

1) VERIFY DTC IS ACTIVE

Turn the ignition on.

With the scan tool, read and record ABS DTCs.

With the scan tool, read and record Environmental Data (EV Data).

With the scan tool, erase ABS DTCs.

Cycle the ignition switch.

With the scan tool, read ABS DTCs.

Does this DTC reset?

Yes

Go to 2).

No

The condition that caused the symptom is currently not present. Inspect the related wiring for a
possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.

Refer to the ABS INTERMITTENT CONDITION.

2) CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCs

Possible Causes

WIRING HARNESS, TERMINAL, CONNECTOR DAMAGE
DTCs RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
CAN C BUS CIRCUITS OPEN OR SHORTED
ECM OR PCM DTCs PRESENT
ECM OR PCM
ANTI-LOCK BRAKES MODULE

2007 Dodge Nitro R/T

2007 BRAKES ABS - Electrical Diagnostics - Nitro

With the scan tool, read all active DTCs from all CAN C Bus modules.

Does the scan tool display any active DTCs related to the conditions listed above?

Yes

Diagnose and repair the DTC(s). Refer to the DIAGNOSTIC CODE INDEX .

No

Go to 3).

3) CHECK IF ECM OR PCM DTCs ARE PRESENT

With the scan tool, read ECM or PCM DTCs.

Are any DTCs present?

Yes

Diagnose and repair the DTC(s). Refer to the appropriate Engine ELECTRICAL DIAGNOSTICS
article .

Perform ABS VERIFICATION TEST.

No

Go to 4).

4) CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCs

With the scan tool, select Network View and select Advanced.

Is there more than one module with active DTCs "Logged Against" the ECM or PCM?

Yes

Replace/update the ECM or PCM in accordance with the service information.

Perform POWERTRAIN VERIFICATION TEST . .

Perform ABS VERIFICATION TEST.

No

Using the schematics as a guide, check the Anti-Lock Brakes Module pins, terminals, and
connectors for corrosion, damage, and terminal push out. Pay particular attention to all

NOTE:

Check for CAN C hardware electrical, VIN Missing/Mismatch, battery or
ignition related DTCs.

2007 Dodge Nitro R/T

2007 BRAKES ABS - Electrical Diagnostics - Nitro

Communication circuits. If no problems are found, replace the Anti-Lock Brakes Module in
accordance with the Service Information.

Perform ABS VERIFICATION TEST.

U1502-IMPLAUSIBLE MESSAGE DATA LENGTH RECEIVED FROM TCM

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

When Monitored:

Continuously, with ignition on.

Set Condition:

If the Anti-Lock Brakes Module detects bus messages from the Transmission Control Module (TCM) are
of improper data length.

Diagnostic Test

1) VERIFY DTC IS ACTIVE

Turn the ignition on.

With the scan tool, read and record ABS DTCs.

With the scan tool, read and record Environmental Data (EV Data).

With the scan tool, erase ABS DTCs.

Cycle the ignition switch.

With the scan tool, read ABS DTCs.

Does this DTC reset?

Yes

Go to 2).

Possible Causes

WIRING HARNESS, TERMINAL, CONNECTOR DAMAGE
DTCs RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
CAN C BUS CIRCUITS OPEN OR SHORTED
TCM DTCs PRESENT
TCM
ANTI-LOCK BRAKES MODULE

2007 Dodge Nitro R/T

2007 BRAKES ABS - Electrical Diagnostics - Nitro

No

The condition that caused the symptom is currently not present. Inspect the related wiring for a
possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.

Refer to the ABS INTERMITTENT CONDITION.

2) CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCs

With the scan tool, read all active DTCs from all CAN C Bus modules.

Does the scan tool display any active DTCs related to the conditions listed above?

Yes

Diagnose and repair the DTC(s). Refer to the DIAGNOSTIC CODE INDEX .

No

Go to 3).

3) CHECK IF TCM DTCs ARE PRESENT

With the scan tool, read TCM DTCs.

Are any TCM DTCs present?

Yes

Diagnose and repair the DTC(s).

Perform 42RLE TRANSMISSION VERIFICATION TEST .

No

Using the schematics as a guide, check the Anti-Lock Brakes Module pins, terminals, and
connectors for corrosion, damage, and terminal push out. Pay particular attention to all
Communication circuits. If no problems are found, replace the Anti-Lock Brakes Module in
accordance with the Service Information.

Perform ABS VERIFICATION TEST.

U1503-IMPLAUSIBLE MESSAGE DATA LENGTH RECEIVED FROM FCM

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

When Monitored:

NOTE:

Check for CAN C hardware electrical, VIN Missing/Mismatch, battery or
ignition related DTCs.

2007 Dodge Nitro R/T

2007 BRAKES ABS - Electrical Diagnostics - Nitro