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Transfer Case - Electrical Diagnostics: Diagnosis Dodge Cab & Chassis R3500 HD

Transfer Case 2 illustrations ~1009 words

DIAGNOSTIC CODE INDEX

DTCDescription
C1401TRANSFER CASE RANGE SELECT SWITCH CIRCUIT LOW (CCN)
C1402TRANSFER CASE RANGE SELECT SWITCH CIRCUIT HIGH (CCN)
C1404TRANSFER CASE RANGE POSITION SENSOR CIRCUIT LOW (TIPM)
C1405TRANSFER CASE RANGE POSITION SENSOR CIRCUIT HIGH (TIPM)
C1407TRANSFER CASE BRAKE CONTROL CIRCUIT LOW (TIPM)
C1408TRANSFER CASE BRAKE CONTROL CIRCUIT HIGH (TIPM)
C140BTRANSFER CASE MOTOR CONTROL CIRCUIT LOW (TIPM)
C140CTRANSFER CASE MOTOR CONTROL CIRCUIT HIGH (TIPM)
C140DTRANSFER CASE MOTOR CONTROL CIRCUIT OPEN (TIPM)
C1464FRONT AXLE DISCONNECT CONTROL CIRCUIT LOW (TIPM)
C1465FRONT AXLE DISCONNECT CONTROL CIRCUIT HIGH (TIPM)
C1468FRONT AXLE DISCONNECT RETURN CONTROL CIRCUIT LOW (TIPM)
C1469FRONT AXLE DISCONNECT RETURN CONTROL CIRCUIT HIGH (TIPM)
C146AFRONT AXLE DISCONNECT RETURN CONTROL CIRCUIT OPEN (TIPM)
C230ANEUTRAL INDICATOR CONTROL CIRCUIT LOW (CCN)
C230BNEUTRAL INDICATOR CONTROL CIRCUIT HIGH (CCN)

DIAGNOSTIC CODE INDEX

Scheme 225

Scheme 225: Circuit Schematic
Scheme 225: Circuit Schematic

Diagnostic Test

  1. ACTIVE DTC CAUTION: Before removing the TIPM harness connectors, 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 connector. Ignition on, engine not running. With the scan tool, read the TIPM DTCs. Is the status Active for this DTC? Yes Go To 2 . No Go To 9 .
  2. (A880) FUSED B+ OPEN Turn the ignition off to the lock position. Disconnect the FAD harness connector. Ignition on, engine not running. With the scan tool, actuate the Front Axle Lock Signal in the TIPM. Using a 12-volt test light connected to ground, check the (A880) Front Axle Lock Signal circuit in the FAD harness connector. Does the test light illuminate brightly? Yes Go To 3 . No Repair the (A880) Fused B+ circuit for an open. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) .
  3. (G304) FRONT AXLE LOCK CONTROL CIRCUIT Using a 12-volt test light, jump across from the (A880) Fused B+ circuit and the G304 Front Axle Lock Control circuit in the FAD harness connector. With the scan tool, actuate the Front Axle Lock in the TIPM. Does the test light illuminate brightly and flash on and off? Yes Go To 4 . No Go To 6 .
  4. (G303) FRONT AXLE LOCK SIGNAL CIRCUIT Turn the ignition off to the lock position. Connect the FAD harness connector. Using a 12-volt test light connected to ground, backprobe the (G303) Front Axle Lock Signal circuit in the TIPM C4 harness connector. Ignition on, engine not running. With the scan tool, actuate the Front Axle Lock in the TIPM. Does the test light illuminate brightly? Yes Go To 8 . No Go To 5 .
  5. (G303) FRONT AXLE SIGNAL CIRCUIT OPEN Turn the ignition off. Disconnect the FAD harness connector. Disconnect the TIPM C4 harness connector. Measure the resistance of the (G303) Front Axle Lock Signal circuit from the TIPM C4 harness connector to the FAD harness connector. Is the resistance below 5.0 ohms? Yes Go To 7 . No Repair the (G303) Front Axle Lock Signal for an open. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) .
  6. (G304) FRONT AXLE SIGNAL CIRCUIT OPEN Turn the ignition off to the lock position. Disconnect the TIPM C2 harness connector. Measure the resistance of the (G304) Front Axle Lock Signal circuit from the TIPM C2 harness connector to the FAD harness connector. Is the resistance below 5.0 ohms? Yes Go To 8 . No Repair the (G304) Front Axle Lock Control for an open. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) .
  7. FRONT AXLE DISCONNECT (FAD) MODULE Using the wiring diagram/schematic as a guide, inspect all wiring and connectors that pertain to this circuit. Were any problems found? Yes Repair as necessary. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Replace the Front Axle Disconnect (FAD) Module in accordance with the Service Information. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) .
  8. TOTALLY INTEGRATED POWER MODULE (TIPM) Using the wiring diagram/schematic as a guide, inspect all wiring and connectors that pertain to this circuit. Were any problems found? Yes Repair as necessary. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Replace the Totally Integrated Power Module (TIPM) in accordance with the Service Information. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) .
  9. 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 scan tool, monitor the data related to this circuit while performing the wiggle test. Look for the data to change or for the DTC to reset. Were there any problems found? Yes Repair as necessary. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Test Complete.

Scheme 226

Scheme 226: Circuit Schematic
Scheme 226: Circuit Schematic

TRANSFER CASE VERIFICATION TEST - VER 1

Disconnect all jumper wires and reconnect all previously disconnected components and connectors.

With the scan tool, select clear Stored DTCs.

Make sure that all accessories are turned off and that the battery is fully charged.

Test drive the vehicle in each Transfer Case range and verify proper operation in each range.

  1. To select or deselect 2WD, AWD or 4HI mode, vehicle speed must be below 88 Kmh (55 mph) with all wheels at vehicle speed.
  2. Shifts will not take place with a wheel speed difference of greater than 21 Kmh (13 mph) between the front and rear wheels.
  3. To select or deselect 4LO (if equipped), vehicle speed must be below 5 Kmh (3 mph) with the ignition ON and the transmission in neutral (auto trans) or the clutch pedal pressed (man trans).
  4. To select or deselect Transfer Case Neutral, vehicle speed must be 0 Kmh (0 mph) with the ignition ON, engine OFF, the brake pedal applied, and the transmission in neutral (auto trans) or the clutch pedal pressed (man trans). Press the Neutral button (if equipped) on the Transfer Case Selector Switch until the Neutral Indicator is illuminated. WARNING: Apply the parking brake. The vehicle may roll with the Transfer Case in neutral.
  5. To verify that the Transfer Case is in Neutral, shift the automatic transmission into reverse and release the brake pedal for three seconds or shift the manual transmission into gear and slowly release the clutch pedal. There should be no vehicle movement if the Transfer Case is in Neutral.

With the scan tool, select View DTCs in the Totally Integrated Power Module (TIPM) and in the Instrument Cluster (CCN).

Are there any DTCs present in the Totally Integrated Power Module (TIPM) or in the Instrument Cluster (CCN)?

Yes

  1. Return to the symptom list and perform the appropriate diagnostic test.

No

  1. Repair is complete.

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