Service Information

Cruze

DTC P2533

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 P2533 06: Ignition On/Start Switch Circuit Low Voltage/Open

Circuit/System Description

The engine control module (ECM) uses the ignition 1 voltage circuit to monitor system voltage. Voltage that is out of range will cause damage to components and incorrect input readings.

Conditions for Running the DTC

•	The ignition is ON.

•	The DTC runs once per ignition cycle once the above condition is met.

Conditions for Setting the DTC

The ECM detects an open or a short to ground on the Ignition 1 voltage circuit.

Action Taken When the DTC Sets

DTC P2533 is a Type B DTC.

Conditions for Clearing the DTC

DTC P2533 is a Type B DTC.

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool System Voltage parameter. The reading should indicate B+.
Observe the DTC information with a scan tool. DTC P2533 should not set.
Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Ignition OFF, disconnect the K20 Engine Control Module harness connector X2.
Ignition ON, test for battery voltage on the ignition 1 voltage circuit terminal 28 X2.

⇒	If less than the specified range, test the ignition 1 voltage circuit for an open or a short to ground.

Verify a test lamp illuminates between the ignition 1 voltage circuit terminal 28 X2 and ground.

⇒	If the test lamp does not illuminate, repair the ignition 1 voltage circuit for a high resistance.

If the circuit test normal, test or replace the K20 Engine Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ECM replacement, setup, and programming