Hybrid/EV Controls
DTC P2534 or P2535
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 P2534
-
Ignition 1 Switch Circuit Low Voltage
DTC P2535
-
Ignition 1 Switch Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
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 hybrid powertrain control module monitors the system voltage on the ignition voltage circuit.
Conditions for Running the DTC
The generator control module is communicating on the serial data circuits.
P2534
Ignition is ON.
P2535
Ignition is OFF.
Conditions for Setting the DTC
P2535
The hybrid powertrain control module detects greater than 5 volts on the ignition voltage circuit at the generator control module when not enabled for greater than 10 seconds.
P2534
The hybrid powertrain control module detects less than 2 volts on the ignition voltage circuit at the generator control module for greater than 10 seconds.
Action Taken When the DTC Sets
DTCs P2534 and P2535 are Type A DTCs.
Conditions for Clearing the DTC
DTCs P2534 and P2535 are Type A DTCs.
Diagnostic Aids
* Verify the charging system is functioning correctly.
* If the run crank circuit is shorted to voltage, the engine will continue to run with the ignition in the OFF position.
Reference Information
Schematic Reference
Hybrid Energy Storage Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Connector End Views By Name
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
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
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Circuit/System Testing
1. Ignition OFF, measure and record the battery voltage at the battery terminals. The battery voltage should stabilize between 12.4 and 12.8V within a few minutes of turning the ignition OFF.
• If not within the specified range, refer to Battery Inspection/Test Battery Inspection/Test.
2. Ignition OFF, disconnect K59 starter generator control module X3 connector.
3. Ignition ON, test for 8-18V between the K59 starter generator control module X3 connector ignition voltage circuit terminal 10 and ground.
• If not within the specified range, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests 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 Starter Generator Control Module, also called the Starter generator Control Module, replacement, programming and setup.