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 00
- Battery Charger Control Module Wake-Up Circuit Performance

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 (BCM) 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.
* The control module is never signaled; therefore the specific subsystems will not function.

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 control modules.

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

Verify that DTC P06E4 is not set.

If the DTC is set, refer to DTC P06E4 P06E4.

Circuit/System Testing

Note: Use the schematic to identify the control modules B+, ignition, and accessory wake up serial data 2 circuit terminals.

1. Vehicle OFF, disconnect the X1 harness connector at the T18 battery charger.
2. Vehicle in Service Mode, 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, test the circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K114B hybrid powertrain control module 2.

3. Vehicle OFF, verify that a test lamp does not illuminate between the accessory wake up serial data 2 circuit terminal F X1 and ground.

• If the test lamp illuminates, test the circuit for a short to voltage. If the circuit tests normal, replace the K114B hybrid powertrain control module 2.

4. If all circuits test normal, replace the T18 battery charger.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

Control Module References Programming and Relearning for control module replacement, programming and setup.