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Diagnostic Test

WARNING: This page is about a different car, the 2016 Dodge Journey and 2015 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK SCAN TOOL COMMUNICATION 
    1. Verify the scan tool can communicate with another vehicle.

      Does the scan tool communicate with another vehicle?

      Yes 

      • Go To Step  2

      No 

      • Contact the scan tool support.
  2. CHECK THE SCAN TOOL CONNECTION 
    1. Verify all terminals in the DLC are locked into place and there is no damage to the connector or terminals.

      Are all terminals in the DLC locked into place and no damage found to the connector or terminals?

      Yes 

      • Go To Step  3

      No 

      • Repair the DLC and terminals as needed. Once the repair is complete, check the communication between the scan tool and this vehicle.
  3. CHECK THE CAN IHS BUS VOLTAGES AT THE DATA LINK CONNECTOR 
    1. Connect a battery charger to the vehicle in accordance with Service Information to maintain a full state of charge throughout testing on this vehicle.
    2. Turn the ignition to the "ON" position.
    3. Connect the (special tool #CH7002, Break Out Box, J1962, 16-Way) to the DLC.
      NOTE:

      Do not connect the scan tool to the Break Out Box.

    4. Measure the voltage on the CAN IHS Bus (+) circuit at the Breakout Box and note the results. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.
    5. Measure the voltage on the CAN IHS Bus (-) circuit at the Breakout Box and note the results. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.

      Determine which best describes the results found:

      NORMAL - CAN IHS (+) and (-) voltages 

      • For a Dual  Star Connector CAN IHS system = Go To Step  4
      • For a Single  Star Connector CAN IHS system = Go To Step  15

      ABNORMAL - CAN IHS (+) and (-) voltages 

      • For a Dual  Star Connector CAN IHS system = Go To Step  8
      • For a Single  Star Connector CAN IHS system = Go To Step  18
  4. CHECK THE CAN IHS BUS VOLTAGES AT THE REAR STAR CONNECTOR (DUAL STAR CONNECTOR SYSTEM) 
    1. Disconnect the 3 wire harness connector at the Rear CAN IHS Star Connector and check the CAN IHS bus (+) and (-) voltages between ground and each circuit at the harness connector. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.

      Are the CAN IHS Bus voltages within the specified values?

      Yes 

      • Go To Step  5

      No 

      • Repair the CAN IHS bus circuit(s) between the Front and Rear CAN IHS Star Connectors for an open or high resistance.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  5. CHECK THE CAN IHS BUS VOLTAGES AT THE BODY CONTROL MODULE (BCM) (DUAL STAR CONNECTOR SYSTEM) 
    1. Connect the 3 wire harness connector to the Rear CAN IHS Star Connector.
    2. Disconnect the BCM connector containing the CAN IHS circuits.
    3. Check the CAN IHS bus (+) and (-) voltages between ground and each circuit at the BCM connector. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.

      Are the CAN IHS Bus voltages within the specified values?

      Yes 

      • Go To Step  6

      No 

      • Repair the CAN IHS bus circuit(s) between the Rear Star Connector and the BCM for an open or high resistance.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  6. CHECK ALL FUSED B(+) CIRCUITS TO THE BCM (DUAL STAR CONNECTOR SYSTEM) 
    1. Turn the ignition off.
    2. Disconnect the BCM harness connectors.
    3. With a 12-volt test light connected to ground, check the Fused B(+) circuits at the BCM harness connector(s).
      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 on all power circuit feeds to the BCM?

      Yes 

      • Go To Step  7

      No 

      • Repair the Fused B (+) circuit(s) for an open or high resistance.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  7. CHECK ALL GROUND CIRCUITS TO THE BCM (DUAL STAR CONNECTOR SYSTEM) 
    1. With a 12-volt test light connected to 12 volts, check all Ground circuits at the BCM connector(s)
      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 on all ground circuits?

      Yes 

      • Replace the Body Control Module (BCM) in accordance with Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Repair the Ground circuit(s) for an open or high resistance.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  8. CHECK THE CAN IHS BUS VOLTAGES AT THE DLC (DUAL STAR CONNECTOR SYSTEM) 
    1. Disconnect the 3 wire harness connector at the Rear CAN IHS Star Connector.
    2. Check the CAN IHS bus (+) and (-) voltages between ground and each circuit at the DLC. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.

      Are the CAN IHS Bus voltages within the specified values?

      Yes 

      • Go To Step  9

      No 

      • Go To Step  11
  9. CHECK THE CAN IHS BUS CIRCUITS TO THE MODULE (DUAL STAR CONNECTOR SYSTEM) 
    1. Connect the 3 wire harness connector to the Rear CAN IHS Star Connector.
    2. Disconnect one 2 wire connector from the Rear CAN IHS Star Connector.
    3. Measure the voltage on the CAN C (+) circuit at the DLC breakout box. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.
    4. Measure the voltage on the CAN C (-) circuit at the DLC breakout box. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.
      NOTE:

      If the voltage for each CAN C circuit does not read within the specified CAN C circuit voltage range, connect the 2 wire connector back to the Rear CAN IHS Star Connector and disconnect a different one. Then, repeat the voltage measurements. Repeat as necessary until the CAN C circuit voltages read within the specified CAN C circuit voltage range.

      Did the CAN C voltages read within the specified CAN C circuit voltage range when one of the 2 wire connectors were disconnected?

      Yes 

      • Go To Step  10

      No 

      • Replace the Rear CAN IHS Star Connector in accordance with Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  10. CHECK THE MODULE (DUAL STAR CONNECTOR SYSTEM) 
    1. Connect the 2 wire connector that allowed the CAN IHS Bus voltages to return to the normal operating range.
    2. Disconnect the associated module while monitoring the CAN IHS bus voltages at the DLC. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.

      Did the CAN IHS Bus voltages return to normal operating range?

      Yes 

      • Replace the associated module in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Repair the CAN IHS Bus circuits between the Rear Star Connector and the associated module for an open or high resistance.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  11. CHECK THE CAN IHS BUS VOLTAGES (DUAL STAR CONNECTOR SYSTEM) 
    1. Disconnect the 3 wire connector at the Front CAN IHS Star Connector and check the CAN IHS bus (+) and (-) voltages at the DLC with the Breakout Box. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.

      Did the CAN IHS Bus voltages return to normal operating range?

      Yes 

      • Repair the CAN C bus circuits between the Front and Rear CAN IHS Star Connectors for an open or high resistance.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To Step  12
  12. CHECK THE CAN IHS BUS CIRCUITS TO THE MODULES (DUAL STAR CONNECTOR SYSTEM) 
    1. Connect the 3 wire connectors to the Rear CAN IHS Star Connector.
    2. Connect the 3 wire connectors to the Front CAN IHS Star Connector.
    3. Disconnect one 2 wire connector from the Front CAN IHS Star Connector.
    4. Measure the voltage on the CAN IHS (+) circuit at the DLC breakout box. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.
    5. Measure the voltage on the CAN IHS (-) circuit at the DLC breakout box. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.
      NOTE:

      If the voltage for each CAN IHS circuit does not read within the specified CAN IHS circuit voltage range, connect the 2 wire connector back to the Front CAN IHS Star Connector and disconnect a different one. Then, repeat the voltage measurements. Repeat as necessary until the CAN IHS circuit voltages read within the specified CAN IHS circuit voltage range.

      Did the CAN IHS Bus voltages return to normal operating range?

      Yes 

      • Go To Step  13

      No 

      • Go To Step  14
  13. CHECK THE MODULE (DUAL STAR CONNECTOR SYSTEM) 
    1. Connect the 2 wire connector that allowed the CAN IHS Bus voltages to return to the normal operating range.
    2. Disconnect the associated module while monitoring the CAN IHS bus voltages at the DLC. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.

      Did the CAN IHS Bus voltages return to the normal operating range?

      Yes 

      • Replace the associated module in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Repair the CAN IHS Bus circuits between the Front CAN IHS Star Connector and the associated module for an open or high resistance.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  14. CHECK THE CAN IHS BUS CIRCUITS FOR AN OPEN OR SHORT (DUAL STAR CONNECTOR SYSTEM) 
    1. Check the CAN IHS bus (+) and (-) circuits for continuity to ground, short to voltage and opens from the DLC to the Front CAN IHS Star Connector. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.

      Is the CAN IHS bus wiring open or shorted?

      Yes 

      • Repair the CAN IHS bus circuits between the DLC and the Front Star Connectors for a short to ground, short to voltage or an open.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Replace the Front CAN IHS Star Connector in accordance with Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  15. CHECK THE CAN IHS BUS VOLTAGES AT THE BODY CONTROL MODULE (BCM) (SINGLE STAR CONNECTOR SYSTEM) 
    1. Disconnect the BCM connector containing the CAN IHS circuits.
    2. Check the CAN IHS bus (+) and (-) voltages between ground and each circuit at the BCM connector. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.

      Are the CAN IHS Bus voltages within the specified values?

      Yes 

      • Go To Step  16

      No 

      • Repair the CAN IHS bus circuit(s) between the Rear Star Connector and the BCM for an open or high resistance.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  16. CHECK ALL FUSED B(+) CIRCUITS TO THE BCM (SINGLE STAR CONNECTOR SYSTEM) 
    1. Turn the ignition off.
    2. Disconnect the BCM harness connectors.
    3. With a 12-volt test light connected to ground, check the Fused B(+) circuits at the BCM harness connector(s).
      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 on all power circuit feeds to the BCM?

      Yes 

      • Go To Step  17

      No 

      • Repair the Fused B (+) circuit(s) for an open or high resistance.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  17. CHECK ALL GROUND CIRCUITS TO THE BCM (SINGLE STAR CONNECTOR SYSTEM) 
    1. With a 12-volt test light connected to 12 volts, check all Ground circuits at the BCM connector(s)
      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 on all ground circuits?

      Yes 

      • Replace the Body Control Module (BCM) in accordance with Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Repair the Ground circuit(s) for an open or high resistance.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  18. CHECK THE CAN IHS BUS VOLTAGES (SINGLE STAR CONNECTOR SYSTEM) 
    1. Disconnect one 2 wire connector from the CAN IHS Star Connector going to a module, leaving the BCM last.
    2. Measure the voltage on the CAN IHS (+) circuit at the DLC breakout box. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.
    3. Measure the voltage on the CAN IHS (-) circuit at the DLC breakout box. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.
      NOTE:

      If the voltage for each CAN IHS circuit does not read within the specified CAN IHS circuit voltage range, connect the 2 wire connector back to the CAN IHS Star Connector and disconnect a different one, leaving the BCM last. Then, repeat the voltage measurements. Repeat as necessary until the CAN IHS circuit voltages read within the specified CAN IHS circuit voltage range.

      Did the CAN IHS Bus voltages return to normal operating range?

      Yes 

      • Go To Step  19

      No 

      • Go To Step  20
  19. CHECK THE MODULE 
    1. Connect the 2 wire connector that allowed the CAN IHS Bus voltages to return to the normal operating range.
    2. Disconnect the associated module while monitoring the CAN IHS bus voltages at the DLC. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.

      Did the CAN IHS Bus voltages return to the normal operating range?

      Yes 

      • Replace the associated module in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Repair the CAN IHS Bus circuits between the Front CAN IHS Star Connector and the associated module for an open or high resistance.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  20. CHECK THE CAN IHS BUS CIRCUITS FROM THE DLC TO THE STAR CONNECTOR 
    1. Check the CAN IHS bus (+) and (-) circuits for continuity to ground, short to voltage and opens from the DLC to the CAN IHS Star Connector. Compare the results to the NORMAL CAN CIRCUIT VOLTAGE TABLE.

      Is the CAN IHS bus wiring open or shorted?

      Yes 

      • Repair the CAN IHS bus circuits between the DLC and the Star Connector for a short to ground, short to voltage or an open.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Replace the CAN IHS Star Connector in accordance with Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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