Diagnostic Test

CHECK FOR RELATED DTCS
WARNING: On vehicles equipped with the high voltage system, you must thoroughly read and follow all High Voltage Safety procedures. In addition, before performing any diagnostic or service procedure near a high voltage component, you must perform the High Voltage Power Down. Failure to follow these instructions may result in possible serious or fatal injury. Refer to Electrical/Battery System - Warning
1. With the scan tool, read Hybrid Gateway Module (HGM) DTCs.
  Are there any HGM, HCP, or FDCM DTCs also present?
  
  Yes
  - Refer to DTC-Based Diagnostics/MODULE, Hybrid Gateway (HGM) - Diagnosis and Testing and perform the appropriate diagnostic procedure.
  No
  - Go to step 2
CHECK FOR RELATED TCM DTCS
1. With the scan tool, read DTCs.
  Are any other modules reporting a Lost Communication with TCM DTC?
  
  Yes
  - Refer to DTC-Based Diagnostics/MODULE, Hybrid Gateway (HGM) - Diagnosis and Testing and perform the diagnostic procedure for Lost Communication with TCM.
  No
  - Go to step 3
CHECK IF THE DTC IS CURRENT
Is the status Active for this DTC?

Yes
- Go to step 5
No
- Go to step 4
VERIFY IF THE DTC CAN BE RESET
1. Record the Environmental Data for this DTC and erase DTCs.
2. Cycle the ignition off for 3 minutes and back on.
  Does the DTC reset?
  
  Yes
  - Go to step 5
  No
  - Go to step 6
CHECK THE TRANSMISSION FLUID LEVEL
1. Using the schematics as a guide, check the Transmission Electro Hydraulic Control Module (TEHCM) connectors and terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. Refer to any Technical Service Bulletins or Service Information Updates for possible causes that may apply. Verify that the TCM is equipped with the latest software and is properly programmed. If no problems are found, replace and program the TEHCM in accordance with the Service Information. With the scan tool perform the Resolver Offset Learn Trigger procedure.
2. Perform 2-MODE HYBRID TRANSMISSION VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Electronic Hydraulic Control (TEHCM) - Standard Procedure .
3. With the scan tool, read DTCs.
  Does the DTC reset?
  
  Yes
  - Replace and program the Hybrid Gateway Module in accordance with the Service Information.
  - Perform HGM VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Hybrid Gateway (HGM) - Standard Procedure .
  No
  - Test Complete.
CHECK THE WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set.
3. Check Service Information Tune-ups or Service Bulletins for any possible causes that may apply.
4. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
5. Wiggle the wires while checking for shorted and open circuits.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform 2-MODE HYBRID TRANSMISSION VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Electronic Hydraulic Control (TEHCM) - Standard Procedure .
  No
  - Test Complete.