Diagnostic Test

ENGINE CONTROL MODULE (ECM) or POWERTRAIN CONTROL MODULE (PCM) DTCs PRESENT
1. With the scan tool, read DTCs.
  Are there any PCM or ECM brake DTCs present?
  
  Yes
  - Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Diagnosis and Testing for gas engine applications.
  No
  - Go to step 2
WIN DTCS PRESENT
1. With the scan tool, read WIN DTCs.
  Are there any WIN DTCs present?
  
  Yes
  - Refer to DTC-Based Diagnostics/NODE, Wireless Ignition (WIN) - Diagnosis and Testing and perform the appropriate diagnostic procedure.
  No
  - Go to step 3
(K321) BTSI CONTROL CIRCUIT SHORTED TO VOLTAGE

Fig 1: Checking BTSI Control Circuit For Short To Voltage
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the ESM C1 harness connector.
3. Disconnect the WIN harness connector.
4. Turn the ignition on.
  NOTE: Check connectors - Clean/repair as necessary.
5. Measure the voltage between ground and the (K321) BTSI Control circuit.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (K321) BTSI Control circuit for a short to voltage.
  - Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure
  No
  - Go to step 4
ELECTRONIC SHIFT MODULE (ESM)
1. Using the schematics as a guide, inspect the wiring and connectors. Repair as necessary. Pay particular attention to all power and ground circuits.
  Repair
  - Replace the Electronic Shift Module (ESM) in accordance with the Service Information.
  - Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .