P0A89

DTC P0A88 or P0A89

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 P0A88

-
14 Volt Power Module Input Current Sensor Low Current

DTC P0A89

-
14 Volt Power Module Input Current Sensor High Current

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 14V power module has 2 current sensors, one for input and one for output current measurements. This diagnostic checks the input current sensor. These current sensors are internal to the 14V power module and are not serviced separately from the generator control module.

Conditions for Running the DTC

* The ignition is ON.

* 14V Power Module Status is Normal.

* Ignition voltage is between 9-16V.

Conditions for Setting the DTC

P0A88

14 volt power module input current is Less than 0.5 amp for greater than 2 seconds.

P0A89

14 volt power module input current is greater than 22.5 amps for greater than 2 seconds.

Action Taken When the DTC Sets

* DTCs P0A88 and P0A89 are Type B DTCs.

* Autostop disabled.

* Autostart disabled.

* Power regeneration disabled.

Conditions for Clearing the DTC

DTCs P0A88 and P0A89 are Type B DTCs.

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

If the DTC is set, 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 Starter Generator Control Module, replacement, programming and setup.