Diagnostic Test

WARNING: This page is about a different car, the 2009 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

ENGINE DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT
1. With the scan tool, read Engine DTCs.
  Are there any Engine brake DTCs present?
  
  Yes
  - Refer to DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Diagnosis and Testing for diesel engine applications or DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Diagnosis and Testing for gas engine applications and perform the appropriate diagnostic procedure.
  No
  - Go to step 2
CHECK THE (K321) BTSI CONTROL CIRCUIT

Fig 1: Checking BTSI Control Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the Shifter Lever Assembly harness connector.
3. Ignition on, engine not running.
4. With the scan tool under Wireless Ignition Node (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 Shifter Lever Assembly 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 3
(K321) BTSI CONTROL CIRCUIT SHORTED TO GROUND

Fig 2: Checking BTSI Control Circuit Shorted To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the Wireless Ignition Node (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 4
(K321) BTSI CONTROL CIRCUIT OPEN

Fig 3: Checking BTSI Control Circuit 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 Shifter Lever Assembly harness connector and the Wireless Ignition Node (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 5
(K321) BTSI CONTROL CIRCUIT SHORT TO VOLTAGE

Fig 4: Checking BTSI Control Circuit Short To Voltage
Courtesy of CHRYSLER LLC
1. Turn the ignition on.
  NOTE: Check connectors - Clean/repair as necessary.
2. 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 6
WIRELESS IGNITION NODE (WIN)
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 Wireless Ignition Node (WIN) in accordance with the Service Information.
  - Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .