P16C6
DTC P16C6
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC P16C6
- Battery Charger Control Module Wake-Up Circuit Performance
For symptom byte information, refer to Symptom Byte List Symptom Byte List.
Diagnostic Fault Information
Circuit/System Description
The accessory wake up serial data 2 circuit is energized by the hybrid powertrain control module 2 to immediately activate the battery charger connected to this circuit when the body control module signals the hybrid powertrain control module 2 that serial data is required. The battery charger monitors the accessory wake up serial data 2 circuit along with the propulsion system active status serial data message. The propulsion system active status message should not be active when the accessory wake up serial data 2 circuit is not high. This DTC is set when the accessory wake up serial data 2 circuit is not high when the propulsion system active signal status is active.
Conditions for Running the DTC
DTC U2609 is not set.
Conditions for Setting the DTC
The battery charger detects a fault in the wake up circuit.
Action Taken When the DTC Sets
DTC P16C6 is a type A DTC.
Conditions for Clearing the DTC
DTC P16C6 is a type A DTC.
Diagnostic Aids
Short to ground may set multiple no communication codes for high speed GMLAN devices.
Reference Information
Schematic Reference
* Data Communication Schematics [1][2]Electrical Diagrams
* Control Module References Programming and Relearning
Connector End View Reference
Component Connector End Views Hybrid/EV Battery Pack X1
Description and Operation
Data Link Communications Description and Operation Description and Operation
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Programming and Relearning for scan tool information
Circuit/System Verification
1. Vehicle in Service Mode.
2. Verify DTC P06E4 is not set.
• If DTC P06E4 is set
Refer to DTC P06E4 P06E4.
• If DTC P06E4 is not set
3. Refer to Circuit/System Testing.
Circuit/System Testing
Note: Use the schematics and connector end views to identify the device's accessory wake up serial data 2 circuit terminals.
1. Vehicle OFF, all access doors closed, all vehicle systems OFF, and all keys at least 3 meters (9.8 feet) away from vehicle. Disconnect the X1 harness connector at the T18 battery charger. It may take up to 2 minutes for all vehicle systems to power down.
2. Vehicle in Service Mode.
3. Verify that a test lamp illuminates between the accessory wake up serial data 2 circuit terminal F X1 and ground.
• If the test lamp does not illuminate
1. Vehicle OFF, disconnect the X2 harness connector at the K114B hybrid powertrain control module 2.
2. Test for infinite resistance between the T18 battery charger wake up circuit terminal F X1 and the K114B hybrid powertrain control module 2 wake up circuit terminal 69 X2.
• If infinite resistance, repair the open/high resistance in the accessory wake up serial data 2 circuit.
• If less than infinite resistance, replace the K114B hybrid powertrain control module 2.
• If the test lamp illuminates
4. Replace the T18 battery charger.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
Control Module References Programming and Relearning for device replacement, programming and setup.