P1ADE
DTC P1ADE or P1ADF
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 P1ADE
-
Drive Motor Control Module System Voltage Low Voltage
DTC P1ADF
-
Drive Motor Control Module System Voltage High Voltage
Circuit/System Description
The generator control module also called the starter generator control module is comprised of the following three control modules; the hybrid powertrain control module, 14 volt power module and the drive motor control module. These three control modules are non serviceable and are part of the generator control module.
The drive motor control module operates the starter generator based upon hybrid powertrain control module information.
The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range.
Conditions for Running the DTC
The Ignition is ON.
Conditions for Setting the DTC
P1ADE
Drive motor control module ignition voltage is less than or equal to 10 V for 6 seconds.
P1ADF
Drive motor control module ignition voltage is greater than 18 Volts for 5 seconds.
Action Taken When the DTC Sets
DTCs P1ADE and P1ADF are Type C DTCs.
P1ADE
The hybrid powertrain control module opens the high voltage contactor relay.
Conditions for Clearing the DTC
DTCs P1ADE and P1ADF are Type C DTCs.
Diagnostic Aids
* A high or low voltage DTC set
Or
Voltage value in multiple modules/sensors indicates a concern in the charging system.
* A battery charger or vehicle jump start may have set DTC P1ADF.
Reference Information
Schematic Reference
Hybrid Energy Storage Schematics [1][2]Electrical Diagrams
Description and Operation
* Starter Generator Description and Operation Starter Generator Description and Operation
* Generator Control Module Description and Operation Generator Control Module Description and Operation
* Hybrid Modes of Operation Description Hybrid Modes of Operation Description
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Circuit/System Verification
1. Ignition OFF, measure and record the battery voltage at the C1 12V battery terminals. The battery voltage should stabilize between 12.4 and 12.8 V within a few minutes of turning the ignition OFF.
• If not within the specified range, refer to Battery Inspection/Test Battery Inspection/Test for Hybrid (HP6).
2. Engine running, accessories OFF, measure and record the battery voltage at the C1 12V battery terminals. The voltage should be at least 1 V greater than the voltage measured in step 1 but less than 15 V.
• If not within the specified range, refer to Charging System Test Initial Inspection and Diagnostic Overview for Hybrid (HP6).
3. Observe the drive motor control module ignition 1 signal voltage parameter with a scan tool. The voltage readings should be within 1 V of the 12V battery voltage.
Circuit/System Testing
Note:
Use the schematic to identify the following:
* Control modules the vehicle is equipped with
* The control modules ground, B+, and ignition circuit terminal IDs and connectors
1. Ignition OFF, disconnect the harness connectors at the K59 starter generator control module.
Note:
Some control module ground circuits may require up to 20 minutes to achieve a resistance reading of less than 10 ohms. In most cases the readings will drop below 20 ohms within 1 minute indicating the control modules are going to sleep.
2. Ignition OFF, scan tool disconnected, open and close the driver door and wait 1 minute. Test for less than 10 ohms between each ground circuit terminal at the K59 starter generator control module harness and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Test for 10-18V between each B+ circuit terminal at the K59 starter generator control module harness and ground.
• If less than the specified range, test the B+ circuit for a short to ground or an open/high resistance.
Note:
If less than the specified range, test the B+ circuit for a short to ground or an open/high resistance.
4. Ignition ON, test for 10-18 V between each ignition circuit terminal and ground.
• If less than the specified range, test the ignition circuit for a short to ground or an open/high resistance.
5. If all circuits test normal, replace the K59 starter generator control module.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
Control Module References Programming and Relearning for Generator Control Module, also called the Starter Generator Control Module, replacement, programming and setup.