Transfer Case

Diagnostic Routine F

Diagnostic Overview

B11D9:16 and B11D9:17

Refer to Wiring Diagram Set 34 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

DTC Fault Trigger Conditions






Visual Inspection and Diagnostic Pre-checks

- Wiring, terminals or connectors

Pinpoint Test

1. RETRIEVE DTCs (Diagnostic Trouble Codes) FROM THE PCM (Powertrain Control Module) KOEO (Key ON Engine OFF) SELF-TEST

1. Ignition ON.

2. Using a scan tool, perform PCM (Powertrain Control Module) KOEO (Key ON Engine OFF) self-test to retrieve DTCs (Diagnostic Trouble Codes).

Are any charging system DTCs (Diagnostic Trouble Codes) present in the PCM (Powertrain Control Module)?






2. CHECK BATTERY CONDITION

1. Ignition OFF.

2. Carry out the battery condition test. REFER to Diagnostic Routine A: Battery Condition Test Pinpoint Tests.

Does the battery pass the condition test?






3. CHECK THE CHARGING SYSTEM VOLTAGE

1. NOTE: Do not allow the engine rpm to exceed 2,000 rpm while carrying out this step or the generator may self-excite, resulting in default charging system output voltage. If engine rpm has exceeded 2,000 rpm, shut the vehicle off and restart the engine before carrying out this step.
Start the engine.

2. Measure the voltage of the battery.

- For DTC (Diagnostic Trouble Code) B11D9:17, turn off all accessories and run the engine at 1,500 rpm for a minimum of 2 minutes.
- For DTC (Diagnostic Trouble Code) B11D9:16, turn on headlights and HVAC (Heating, Ventilation, and Air Conditioning) fan on high and run engine at 1,500 rpm for a minimum of 2 minutes.

Is the battery voltage between 13-15.2 volts?






4. CHECK THE ATCM (All Terrain Control Module) VOLTAGE SUPPLY CIRCUIT FOR HIGH RESISTANCE

1. Ignition OFF.

2. Disconnect: ATCM (All Terrain Control Module).

3. START engine.

4. Measure:





Is the voltage greater than 11 volts?






5. CHECK THE ATCM (All Terrain Control Module) GROUND CIRCUIT FOR HIGH RESISTANCE

1. Ignition OFF.

2. Measure:





Is the resistance less than 3 ohms?






6. CHECK FOR CORRECT ATCM (All Terrain Control Module) OPERATION

1. Ignition OFF.

2. Disconnect and inspect ATCM (All Terrain Control Module) connector.

3. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins- install new terminals/pins
- pushed-out pins- install new pins as necessary

4. Reconnect the ATCM (All Terrain Control Module) connector. Make sure it seats and latches correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?