Diagnostic Test

ENGINE CONTROL MODULE (ECM) or POWERTRAIN CONTROL MODULE (PCM) DTCS PRESENT
1. With the scan tool, read ECM or PCM DTCs.
  Are there any 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 GROUND

Fig 1: Checking BTSI Control Circuit For Short To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the ESM C1 harness connector.
3. Ignition on, engine not running.
4. With the scan tool under WIN, actuate the BTSI.
  NOTE: Check connectors - Clean/repair as necessary.
5. Using a 12 volt test light connected to ground, check the (K321) BTSI Control circuit.
  Does the test light illuminate brightly while cycling on and off on all (K321) BTSI Control circuit?
  
  Yes
  - 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 .
  No
  - Go to step 4
(K321) BTSI CONTROL CIRCUIT SHORTED TO GROUND

Fig 2: Checking BTSI Control Circuit For Short To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the WIN harness connector.
  NOTE: Check connectors - Clean/repair as necessary.
3. Measure the resistance 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 ground.
  - Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
  No
  - Go to step 5
(K321) BTSI CONTROL CIRCUIT OPEN

Fig 3: Checking BTSI Control Circuit For Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
  NOTE: Check connectors - Clean/repair as necessary.
2. Measure the resistance of the (K321) BTSI Control circuit between the Electronic Shift Module (ESM) harness connector and the WIN harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the (K321) BTSI Control circuit for an open.
  - Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
  No
  - Go to step 6
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 .