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DTC P16C6

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    • 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

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Accessory Wake Up Serial Data 2

P16C6, U0100-U02FF

U0100-U02FF

U0100-U02FF

--

* Other DTCs may set with this fault

Circuit/System Description

The accessory wake-up serial data 2 circuit is energised 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 signalled; therefore the specific subsystems will not function.

Conditions for Clearing the DTC

DTC P16C6 is a type A DTC.

Diagnostic Aids

Short-circuit to earh may set multiple no communication codes for high-speed GMLAN control modules.

Reference Information

Schematic Reference

    •  Data Communication Schematics
    •  Control Module References

Connector End View Reference

Component Connector End Views

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Verify that DTC P06E4 is not set.

⇒If the DTC is set, refer to DTC 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 earth.
    3. ⇒If the test lamp does not illuminate, test the circuit for a short-circuit to earth or open-circuit/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 earth.
    4. ⇒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 after completing the diagnostic procedure.

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

   


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