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

Monitor Conditions

1. When Monitored: With the ignition on.

Set Conditions

1. Set Condition: Transfer Case Range Select Switch voltage less than 0.1568 volts for 5 seconds

Possible Causes

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1. TRANSFER CASE SWITCH VOLTAGE LESS THAN 0.2 VOLTS Ignition on, engine not running. With the scan tool under CCN, read the Transfer Case Switch voltage. Is the voltage less than 0.2 volts? Yes Go To 2 . No Go To 8 .
2. (K77) 5 VOLT SELECTOR SWITCH SUPPLY CIRCUIT VOLTAGE LESS THAN 0.2 VOLTS Turn the ignition off to the lock position. Disconnect the Transfer Case Selector Switch harness connector. Ignition on, engine not running. Measure the voltage of the (K77) 5 Volt Selector Switch Supply circuit. Is the voltage less than 0.2 volts? Yes Go To 3 . No Go To 5 .
3. (K77) 5 VOLT SELECTOR SWITCH SUPPLY CIRCUIT OPEN Turn the ignition off to the lock position. Disconnect the Cluster C4 connector. Measure the resistance of the (K77) 5 Volt Selector Switch Supply circuit between the Instrument Cluster C4 harness connector and the Transfer Case Selector Switch harness connector. Is the resistance greater than 5.0 ohms? Yes Repair the (K77) 5 Volt Selector Switch Supply circuit for an open. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 4 .
4. (K77) 5 VOLT SELECTOR SWITCH SUPPLY CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K77) 5 Volt Selector Switch Supply circuit. Is the resistance less than 5.0 ohms? Yes Repair the (K77) 5 Volt Selector Switch Supply circuit for a short to ground. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Replace the Instrument Cluster in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) .
5. TRANSFER CASE SELECTOR SWITCH Turn the ignition off to the lock position. Connect a jumper wire between the (K77) 5 Volt Selector Switch Supply circuit and the (K977) Mode Select circuit in the Transfer Case Selector Switch harness connector. Ignition on, engine not running. With the scan tool in Data Display, read the Range Switch voltage. NOTE: The switch voltage should be approximately 5.0 volts ( ±.05 volts). Does the voltage display as described? Yes Replace the Transfer Case Selector Switch in accordance with the Service Information. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 6 .
6. (K977) MODE SELECT CIRCUIT SHORT TO GROUND Disconnect the Cluster C3 connector. Measure the resistance between ground and the (K977) Mode Select circuit. Is the resistance less than 5.0 ohms? Yes Repair the (K977) Mode Select circuit for a short to ground. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 7 .
7. (K977) MODE SELECT CIRCUIT OPEN Measure the resistance of the (K977) Mode Select circuit between the Cluster C3 harness connector and the Transfer Case Selector Switch harness connector. Is the resistance above 5.0 ohms? Yes Repair the (K977) Mode Select circuit for an open. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Replace the Instrument Cluster in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) .
8. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Were any problems found? Yes Repair as necessary. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Test complete.

1. When Monitored: With the ignition on.

1. Set Condition: Transfer Case Range Select Switch voltage greater than 4.86 volts for 5 seconds

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Scheme 234

1. TCASE SWITCH VOLTAGE ABOVE 4.8 VOLTS Ignition on, engine not running. With the scan tool under CCN, read the Transfer Case Switch voltage. Is the volage above 4.8 volts? Yes Go To 2 . No Go To 7 .
2. (K77) 5 VOLT SELECTOR SWITCH SUPPLY CIRCUIT SHORTED TO VOLTAGE Turn the ignition off to the lock position. Disconnect the Transfer Case Selector Switch harness connector. Disconnect the Cluster C4 harness connector. Ignition on, engine not running. Measure the voltage of the (K77) 5 Volt Selector Switch Supply circuit. Is there any voltage present? Yes Repair the (K77) 5 Volt Selector Switch Supply circuit for a short to voltage. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 3 .
3. (K977) MODE SELECT CIRCUIT SHORTED TO VOLTAGE Turn the ignition off to the lock position. Disconnect the Cluster C3 harness connector. Ignition on, engine not running. Measure the voltage of the (K977) Mode Select circuit. Is there any voltage present? Yes Repair the (K977) Mode Select circuit for a short to voltage. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 4 .
4. TRANSFER CASE SELECTOR SWITCH Turn the ignition off to the lock position. Reconnect the Cluster C3 harness connector. Reconnect the Cluster C4 harness connector. Ignition on, engine not running. With the scan tool under CCN, read the Transfer Case Switch voltage. Is the voltage equal to 0.0 volts? Yes Replace the Transfer Case Selector Switch. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 5 .
5. (K977) MODE SELECT CIRCUIT OPEN Turn the ignition off to the lock position. Measure the resistance of the (K977) Mode Select circuit between the Cluster C3 harness connector and the Transfer Case Selector Switch harness connector. Is the resistance above 5.0 ohms? Yes Repair the (K977) Mode Select circuit for an open. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 6 .
6. TRANSFER CASE SELECTOR SWITCH (Z905) GROUND CIRCUIT OPEN Measure the resistance between ground and the (Z905) Transfer Case Selector Switch ground circuit. Is the resistance above 5.0 ohms? Yes Repair the Transfer Case Selector Switch (Z905) ground circuit for an open. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Replace the Instrument Cluster in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) .
7. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Were any problems found? Yes Repair as necessary. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Test complete.

Scheme 235

1. When Monitored: Ignition on. Battery voltage between 9.0 and 16.0 volts.

1. Set Condition: The TIPM detects a short to ground on the Transfer Case Position Sensor Signal circuit for 2.0 seconds.

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1. DTC IS ACTIVE Start the engine and allow it to idle. Move the Transfer Case Selector Switch to each position several times. With the scan tool, read the TIPM DTCs. Is the status Active for this DTC? Yes Go To 2 . No Go To 8 .
2. (T103) 5 VOLT SUPPLY CIRCUIT VOLTAGE BELOW 0.2 VOLTS Turn the ignition off to the lock position. Disconnect the Shift Motor/Mode Sensor harness connector. Ignition on, engine not running. Measure the voltage of the (T103) 5-volt Supply circuit at the Shift Motor/Mode Sensor harness connector. Is the voltage below 0.2 volts? Yes Go To 3 . No Go To 5 .
3. (T103) 5-VOLT SUPPLY CIRCUIT OPEN Turn the ignition off to the lock position. Disconnect the TIPM C4 harness connector. Measure the resistance of the (T103) 5-volt supply circuit between the TIPM C4 harness connector and the Shift Motor/Mode Sensor harness connector. Is the resistance above 5.0 ohms? Yes Repair the (T103) 5-volt supply circuit for an open. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 4 .
4. (T103) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (T103) 5-volts supply circuit. Is the resistance below 5.0 ohms? Yes Repair the (T103) 5-volts supply circuit for a short to ground. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Replace the Totally Integrated Power Module in accordance with the Service Information. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) .
5. SHIFT MOTOR/MODE SENSOR ASSEMBLY Connect the Shift Motor/Mode Sensor harness connector. Ignition on, engine not running. Measure the voltage of the (T103) 5 Volt Supply circuit by backprobing the T-Case Position Sensor harness connector. Is the voltage above 4.5 volts? Yes Replace the Shift Motor/Mode Sensor Assembly. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 6 .
6. (D201) MODE SENSOR A CIRCUIT SHORTED TO GROUND Turn the ignition off to the lock position. Disconnect the Shift Motor/Mode Sensor harness connector. Disconnect the TIPM C4 harness connector. Measure the resistance between ground and the (D201) Mode Sensor A circuit. Is the resistance below 5.0 ohms? Yes Repair the (D201) Mode Sensor A circuit for a short to ground. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 7 .
7. (D201) MODE SENSOR A CIRCUIT SHORTED TO (G180) TIPM SENSOR RETURN CIRCUIT Measure the resistance between the (D201) Mode Sensor A circuit and the (G180) TIPM Sensor Return circuit in the TIPM C4 harness connector. Is the resistance below 5.0 ohms? Yes Repair the (D201) Mode Sensor A circuit for a short to the (G180) TIPM Sensor Return circuit. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Replace the Totally Integrated Power Module in accordance with the Service Information. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) .
8. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Were any problems found? Yes Repair as necessary. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Test complete.

1. When Monitored: With the ignition on. Battery voltage between 9.0 and 16.0 volts

1. Set Condition: The TIPM detects 5.0 volts on the Transfer Case Range Position Sensor Signal circuit for 2.0 seconds when voltage should not be present.

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1. DTC IS ACTIVE NOTE: If both DTCs C140B and C1405 are present, check all related fuses in the Totally Integrated Power Module (TIPM) before continuing with diagnosis. Start the engine and allow it to idle. Move the Transfer Case Selector Switch to each position several times. With the scan tool, read the TIPM DTCs. Is the status Active for this DTC? Yes Go To 2 . No Go To 7 .
2. (T103) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE Turn the ignition off to the lock position. Disconnect the Shift Motor/Mode sensor harness connector. Ignition on, engine not running. Measure the voltage of the (T103) 5 Volt Supply circuit. Is the voltage above 5.5 volts? Yes Repair the (T103) 5 Volt Supply circuit for a short to voltage. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 3 .
3. (D201) MODE SENSOR A CIRCUIT SHORTED TO VOLTAGE Measure the voltage of the (D201) Mode Sensor A circuit. Is the voltage above 5.5 volts? Yes Repair the (D201) Mode Sensor A circuit for a short to voltage. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 4 .
4. SHIFT MOTOR/MODE SENSOR ASSEMBLY Turn the ignition off to the lock position. Connect a jumper wire between the (G180) TIPM sensor return circuit and the (D201) Mode sensor A circuit at the Shift Motor/Mode sensor harness connector. Ignition on, engine not running. While moving the Transfer Case Selector Switch to each position, measure the voltage of the (T103) 5 Volt Supply circuit by backprobing the T-Case Position Sensor harness connector. NOTE: Remove the jumper wire before continuing. Is the voltage below 0.2 volts? Yes Replace the Shift Motor/Mode sensor assembly. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 5 .
5. (D201) MODE SENSOR A CIRCUIT OPEN Turn the ignition off to the lock position. Disconnect the TIPM C4 harness connector. Measure the resistance of the (D201) Mode Sensor A circuit between the Shift Motor/Mode sensor harness connector and the TIPM C4 harness connector. Is the resistance above 5.0 ohms? Yes Repair the (D201) Mode Sensor A circuit for an open. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 6 .
6. (G180) TIPM SENSOR RETURN CIRCUIT OPEN Measure the resistance of the (G180) TIPM Sensor Return circuit between the Shift Motor/Mode sensor harness connector and the TIPM C4 connector. Is the resistance above 5.0 ohms? Yes Repair the (G180) Sensor Return circuit for an open. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Replace the TIPM in accordance with the Service information. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) .
7. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Were any problems found? Yes Repair as necessary. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Test complete.

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1. When Monitored: With the ignition on and no system undervoltage or overvoltage condition present.

1. Set Condition: The Totally Integrated Power Module (TIPM) detects that the Transfer Case Brake circuit input is low when output is off.

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1. DTC IS ACTIVE Start the engine and allow it to idle. Move the Transfer Case Selector Switch to each position several times. With the scan tool, read the TIPM DTCs. Is the status Active for this DTC? Yes Go To 2 . No Go To 5 .
2. (T300) TRANSFER CASE MOTOR BRAKE SIGNAL CIRCUIT SHORTED TO GROUND Turn the ignition off to the lock position. Disconnect the Shift Motor/Mode Sensor Assembly harness connector. Disconnect the TIPM C4 harness connector. Measure the resistance between ground and the (T300) Transfer Case Motor Brake Signal circuit. Is the resistance below 5.0 ohms? Yes Repair the (T300) Transfer Case Motor Brake Signal circuit for a short to ground. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 3 .
3. (T300) TRANSFER CASE MOTOR BRAKE SIGNAL Reconnect the TIPM C4 harness connector. Ignition on, engine not running. While moving the Transfer Case Selector Switch to each position, use a 12-volt test light connected to 12-volts, check the (T300) Transfer Case Motor Brake Signal circuit at the Shift Motor/Mode Sensor Assembly harness connector. NOTE: Compare the brightness to that of a direct connection to the battery. Does the test light illuminate brightly? Yes Replace the Totally Integrated Power Module (TIPM) in accordance with the Service Information. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 4 .
4. (T300) TRANSFER CASE MOTOR BRAKE SIGNAL CIRCUIT OPEN Turn the ignition off to the lock position. Disconnect the TIPM C4 harness connector. Measure the resistance of the (T300) Transfer Case Motor Brake Signal circuit between the TIPM C4 harness connector and the Shift Motor/Mode Sensor Assembly harness connector. Is the resistance above 5.0 ohms? Yes Repair the (T300) Transfer Case Motor Brake Signal circuit for an open circuit or high resistance. 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) .
5. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Were any problems found? Yes Repair as necessary. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Test complete.

1. When Monitored: With the ignition on and no system undervoltage or overvoltage condition present.

1. Set Condition: The Totally Integrated Power Module (TIPM) detects voltage on the Transfer Case Brake circuit when the output is off.

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1. CHECK IF THE DTC IS ACTIVE Start the engine and allow it to idle. Move the Transfer Case Selector Switch to each position several times. With the scan tool, read the TIPM DTCs. Is the status Active for this DTC? Yes Go To 2 . No Go To 5 .
2. (T300) TRANSFER CASE MOTOR BRAKE SIGNAL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off to the lock position. Disconnect the Shift Motor/Mode Sensor Assembly harness connector. Disconnect the TIPM C4 harness connector. Measure the voltage of the (T300) Transfer Case Motor Brake Signal circuit. Is there any voltage present? Yes Repair the (T300) Transfer Case Motor Brake Signal circuit for a short to voltage. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 3 .
3. (T300) TRANSFER CASE MOTOR LOCK SIGNAL CIRCUIT SHORTED TO THE (A918) FUSED BATTERY SUPPLY CIRCUIT Measure the resistance between the (T300) Transfer Case Motor Brake Signal circuit and the (A918) Fused Battery Supply circuit. Is the resistance below 5.0 ohms? Yes Repair the (T300) Transfer Case Motor Brake Signal circuit. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 4 .
4. TRANSFER CASE MOTOR BRAKE Turn the ignition off to the lock position. Reconnect the Shift Motor/Mode Sensor Assembly harness connector. Reconnect the TIPM C4 harness connector. Ignition on, engine not running. With the scan tool, clear TIPM DTCs. With the scan tool, select View DTCs. Does the DTC P1408-Transfer Case Brake Control Circuit High reset? Yes Replace the Transfer Case Motor Assembly in accordance with the Service Information. 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) .
5. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Were any problems found? Yes Repair as necessary. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Test complete.

Scheme 251

1. When Monitored: Ignition on. Battery voltage between 9.0 and 16.0 volts.

1. Set Condition: Totally Integrated Power Module (TIPM) detects low voltage on the Transfer Case Motor Control circuit for a period of 0.5 seconds.

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1. DTC IS ACTIVE NOTE: If both DTCs C140B and C1405 are present, check all related fuses in the Totally Integrated Power Module (TIPM) before continuing with diagnosis. Start the engine and allow it to idle. Move the Transfer Case Selector Switch to each position several times. With the scan tool, read the TIPM DTCs. Is the status Active for this DTC? Yes Go To 2 . No Go To 9 .
2. SHIFT MOTOR HARNESS CIRCUIT RESISTANCE Turn the ignition off to the lock position. Disconnect the TIPM C4 harness connector. Measure the resistance between the (T101) Shift Motor Control A circuit and the (T102) Shift Motor Control B circuit. Is the resistance between 40 and 100 ohms? Yes Go To 8 . No Go To 3 .
3. SHIFT MOTOR CIRCUIT RESISTANCE Disconnect the Shift Motor/Mode Sensor Assembly harness connector. Measure the resistance between the (T101) Shift Motor Control A circuit and the (T102) Shift Motor Control B circuit at the Shift Motor/Mode Sensor Assembly component side. Is the resistance between 40 and 100 ohms? Yes Go To 4 . No Go To 7 .
4. (T101) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (T101) Shift Motor Control A circuit. Is the resistance below 5.0 ohms? Yes Repair the (T101) Shift Motor Control A circuit for a short to ground. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 5 .
5. (T102) SHIFT MOTOR CONTROL B CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (T102) Shift Motor Control B circuit. Is the resistance below 5.0 ohms? Yes Repair the (T102) Shift Motor Control B circuit for a short to ground. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 6 .
6. (T101) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO (T102) SHIFT MOTOR CONTROL B CIRCUIT Measure the resistance between (T101) Shift Motor Control A circuit and the (T102) Shift Motor Control B circuit at the TIPM C4 harness connector. Is the resistance below 5.0 ohms? Yes Repair the (T101) Shift Motor Control A circuit for a short to (T102) Shift Motor Control B circuit. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 8 .
7. SHIFT MOTOR/MODE SENSOR ASSEMBLY 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 Shift Motor/Mode Sensor assembly 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 wiring diagram/schematic as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Were any problems found? Yes Repair as necessary. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Test complete.

1. When Monitored: Ignition on, battery voltage between 9.0 and 16.0 volts.

1. Set Condition: The TIPM detects 16.0 to 18.0 volts on the Transfer Case Motor Control Circuit for 2 seconds.

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1. DTC IS ACTIVE Start the engine and allow it to idle. Move the Transfer Case Selector Switch to each position several times. With the scan tool, read the TIPM DTCs. Is the status Active for this DTC? Yes Go To 2 . No Go To 9 .
2. SHIFT MOTOR HARNESS CIRCUIT RESISTANCE Turn the ignition off to the lock position. Disconnect the TIPM C4 harness connector. Measure the resistance between the (T101) Shift Motor Control A circuit and the (T102) Shift Motor Control B circuit. Is the resistance between 40 and 100 ohms? Yes Go To 8 . No Go To 3 .
3. SHIFT MOTOR RESISTANCE Disconnect the Shift Motor/Mode Sensor Assembly harness connector. Measure the resistance between the (T101) Shift Motor Control A circuit and the (T102) Shift Motor Control B circuit at the Shift Motor/Mode Sensor Assembly component side. Is the resistance between 40 and 100 ohms? Yes Go To 4 . No Go To 7 .
4. (T101) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO VOLTAGE Ignition on, engine not running. Measure the voltage of the (T101) Shift Motor Control A circuit at the TIPM C4 harness connector. Is there any voltage present? Yes Repair the (T101) Shift Motor Control A circuit for a short to voltage. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 5 .
5. (T102) SHIFT MOTOR CONTROL B CIRCUIT SHORTED TO VOLTAGE Measure the voltage of the (T102) Shift Motor Control B circuit at the TIPM C4 harness connector. Is there any voltage present? Yes Repair the (T102) Shift Motor Control B circuit for a short to voltage. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 6 .
6. (T101) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO (T102) SHIFT MOTOR CONTROL B CIRCUIT Measure the resistance between (T101) Shift Motor Control A circuit and the (T102) Shift Motor Control B circuit at the TIPM C4 harness connector. Is the resistance below 5.0 ohms? Yes Repair the (T101) Shift Motor Control A circuit for a short to (T102) Shift Motor Control B circuit. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 8 .
7. SHIFT MOTOR/MODE SENSOR ASSEMBLY 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 Shift Motor/Mode Sensor Assembly 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 wiring diagram/schematic as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Were any problems found? Yes Repair as necessary. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Test complete.

1. When Monitored: Ignition on, battery voltage between 9.0 and 16.0 volts.

1. Set Condition: The TIPM detects no voltage on the Transfer Case Motor Control circuit for a period greater than 2 seconds, when voltage should be present.

Scheme 258

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1. DTC IS ACTIVE Start the engine and allow it to idle. Move the Transfer Case Selector Switch to each position several times. With the scan tool, read the TIPM DTCs. Is the status Active for this DTC? Yes Go To 2 . No Go To 8 .
2. SHIFT MOTOR HARNESS CIRCUIT RESISTANCE Turn the ignition off to the lock position. Remove the TIPM C4 harness connector. Measure the resistance between the (T101) Shift Motor Control A circuit and the (T102) Shift Motor Control B circuit. Is the resistance between 40 and 100 ohms? Yes Go To 7 . No Go To 3 .
3. SHIFT MOTOR CIRCUIT RESISTANCE Disconnect the Shift Motor/Mode Sensor Assembly harness connector. Measure the resistance between the (T101) Shift Motor Control A circuit and the (T102) Shift Motor Control B circuit at the Shift Motor/Mode Sensor Assembly component side. Is the resistance between 40 and 100 ohms? Yes Go To 4 . No Go To 6 .
4. (T101) SHIFT MOTOR CONTROL A CIRCUIT OPEN Measure the resistance of the (T101) Shift Motor Control A circuit between the Shift Motor/Mode Sensor Assembly harness connector and the TIPM C4 harness connector. Is the resistance above 5.0 ohms? Yes Repair the (T101) Shift Motor Control A circuit for an open. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 5 .
5. (T102) SHIFT MOTOR CONTROL B CIRCUIT OPEN Measure the resistance of the (T102) Shift Motor Control B circuit between the Shift Motor/Mode Sensor Assembly harness connector and the TIPM C4 harness connector. Is the resistance above 5.0 ohms? Yes Repair the (T102) Shift Motor Control B circuit for an open. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 7 .
6. SHIFT MOTOR/MODE SENSOR ASSEMBLY 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 Shift Motor/Mode Sensor Assembly in accordance with the Service Information. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) .
7. 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) .
8. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Were any problems found? Yes Repair as necessary. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Test complete.

Scheme 260

1. When Monitored: The ignition on, with the T-Case Switch in a 4W/LO position.

1. Set Condition: The TIPM detects the Front Axle Lock Control circuit is shorted low.

Scheme 261

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 6 .
2. (G304) FRONT AXLE LOCK CONTROL CIRCUIT 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 Control in the TIPM. Using a 12-volt test light connected to 12-volts, check the (G304) Front Axle Lock Control circuit in the FAD harness connector. Does the test light illuminate brightly? Yes Go To 5 . No Go To 3 .
3. (G304) FRONT AXLE LOCK CONTROL CIRCUIT SHORTED TO GROUND Turn the ignition off to the lock position. Disconnect the TIPM C2 harness connector. Measure the resistance between ground and the (G304) Front Axle Lock Control circuit. Is the resistance below 5.0 ohms? Yes Repair the (G304) Front Axle Lock Control circuit for a short to ground. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 4 .
4. 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) .
5. 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) .
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 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.

1. When Monitored: The ignition on and the T-Case Switch in the 4W/LO position.

1. Set Condition: The TIPM detects the Front Axle Lock Control circuit is shorted high.

Scheme 262

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 6 .
2. (G304) FRONT AXLE LOCK CONTROL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off to the lock position. Disconnect the TIPM C2 harness connector. Disconnect the FAD harness connector. Ignition on, engine not running. Measure the voltage between ground and the (G304) Front Axle Lock Control circuit. Does the voltmeter indicate voltage present? Yes Repair the short to voltage in the (G304) Front Axle Lock Control circuit. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 3 .
3. FRONT AXLE DISCONNECT (FAD) MODULE SHORTED TO VOLTAGE Turn the ignition off to the lock position. Connect the FAD harness connector. Ignition on, engine not running. Measure the voltage between ground and the (G304) Front Axle Lock Control circuit. Does the voltmeter indicate any voltage present? Yes Go To 5 . No Go To 4 .
4. 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) .
5. 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) .
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 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.

1. When Monitored: The ignition on, with the T-Case Switch in 4W/LO position.

1. Set Condition: The TIPM detects the Front Axle Lock Signal circuit is shorted low.

Scheme 263

Scheme 264

Scheme 265

Scheme 266

Scheme 267

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 DTC currently active? 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 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. NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery. 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. Reconnect 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 to the lock position. 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 between the (G304) Front Axle Lock Signal circuit from the TIPM C2 harness connector and 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.

1. When Monitored: The ignition on, T-Case Switch in 4W/LO position.

1. Set Condition: The TIPM detects the Front Axle Lock Signal circuit is shorted low.

Scheme 268

Scheme 269

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, select View DTCs. Is the status Active for this DTC? Yes Go To 3 . No Go To 7 .
2. (G303) FRONT AXLE LOCK SIGNAL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off to the lock position. Disconnect the TIPM C4 harness connector. Disconnect the FAD harness connector. Ignition on, engine not running. Measure the voltage of the (G303) Front Axle Lock Signal circuit. Is there any voltage present? Yes Repair the (G303) Front Axle Lock Signal circuit for a short to voltage. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 3 .
3. (G304) FRONT AXLE LOCK CONTROL CIRCUIT Turn the ignition off to the lock position. Disconnect the TIPM C2 harness connector. Ignition on, engine not running. With the scan tool, actuate the TIPM. Using a 12-volt test light connected to 12-volts, check the (G304) Front Axle Lock Control circuit in the FAD harness connector. Does the test light turn on and off? Yes Go To 6 . No Go To 4 .
4. (G304) FRONT AXLE LOCK CONTROL CIRCUIT SHORTED TO GROUND Turn the ignition off to the lock position. Measure the resistance between ground and the (G304) Front Axle Lock Control circuit in the TIPM C2 harness connector. Is the resistance below 5.0 ohms? Yes Repair the (G304) Front Axle Lock Control circuit for a short to ground. Perform «TRANSFER CASE VERIFICATION TEST - VER 1»(ref-303898-S31460151702008103100000) . No Go To 5 .
5. 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) .
6. 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) .
7. 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.

1. When Monitored: The ignition on. T-Case Switch in 4W/LO position.

1. Set Condition: The TIPM detects that the Front Axle Lock Signal circuit is shorted low.

1. When Monitored: With the ignition on and no system undervoltage or overvoltage condition present.

1. Set Condition: The Cluster detects low voltage on the (G95) Neutral Indicator Control Circuit when output is off.

Scheme 270

Scheme 271

Scheme 272

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. With the scan tool, record and erase DTCs. Turn the ignition off, wait 30 seconds then turn the ignition on. Shift the Transfer Case into neutral. With the scan tool, read DTCs. Does the scan tool display: C230A-NEUTRAL INDICATOR CONTROL CIRCUIT LOW? Yes Go To 2 . No The condition that caused this code to set is not present at this time. Using the wiring diagram as a guide, inspect the wiring and connectors for an intermittent condition. Operate the system several times and recheck for active DTCs. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) .
2. (G95) 4WD NEUTRAL INDICATOR CIRCUIT RESISTANCE TO GROUND Turn the ignition off. Disconnect the Cluster C1 connector. Measure the resistance between ground and the (G95) Neutral Indicator circuit. Is the resistance below 5.0 ohms? Yes Go To 3 . No Go To 4 .
3. (G95) NEUTRAL INDICATOR CIRCUIT SHORT TO GROUND Disconnect the Transfer Case Switch harness connector. Measure the resistance between ground and the (G95) Neutral Indicator circuit. Is the resistance below 5.0 ohms? Yes Repair the (G95) Neutral Indicator circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) . No Replace the Transfer Case Switch in accordance with the Service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) .
4. (G95) NEUTRAL INDICATOR CIRCUIT OPEN Disconnect the Transfer Case Switch harness connector. Measure the resistance of the (G95) Neutral Indicator circuit between the Transfer Case Switch harness connector and the Cluster C1 harness connector. Is the resistance above 5.0 ohms? Yes Repair the open (G95) Neutral Indicator circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) . No Replace the Cluster in accordance with the Service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) .

1. When Monitored: With the ignition on and no system undervoltage or overvoltage condition present.

1. Set Condition: The Cluster detects high voltage on the Neutral Indicator Control Circuit when output is on.

Scheme 273

Scheme 274

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. With the scan tool, record and erase DTCs. Turn the ignition off, wait 30 seconds then turn the ignition on. Shift the Transfer Case into neutral. With the scan tool, read DTCs. Does the scan tool display: C230B-NEUTRAL INDICATOR CONTROL CIRCUIT HIGH? Yes Go To 2 . No The condition that caused this code to set is not present at this time. Using the wiring diagram as a guide, inspect the wiring and connectors for an intermittent condition. Operate the system several times and recheck for active DTCs. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) .
2. (G95) NEUTRAL INDICATOR CIRCUIT VOLTAGE Turn the ignition off. Disconnect the Cluster C1 harness connector. Turn the ignition on. Measure the voltage of the (G95) Neutral Indicator circuit. Is there any voltage present? Yes Replace the Cluster in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) . No Go To 3 .
3. (G95) 4WD NEUTRAL INDICATOR CIRCUIT SHORT TO GROUND Turn the ignition off. Disconnect the Transfer Case Switch harness connector. Measure the resistance of the (G95) Neutral Indicator circuit to ground. Is the resistance below 10K ohms? Yes Repair the (G95) Neutral Indicator circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) . No Go To 4 .
4. (G95) 4WD NEUTRAL INDICATOR CIRCUIT OPEN Measure the resistance of the (G95) Neutral Indicator Control circuit between the Transfer Case Switch harness connector and the Cluster C1 harness connector. Is the resistance above 5.0 ohms? Yes Repair the open (G95) Neutral Indicator circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) . No Replace the Transfer Case Switch in accordance with the Service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) .