For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle

• | Review Strategy Based Diagnosis

• | Diagnostic Procedure Instructions

### DTC Descriptor

DTC P2534: Ignition 1 Switch Circuit Low Voltage

### Diagnostic Fault Information

Circuit | Short to Ground | Open or High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
IGN Voltage | P2534 | P2534 | -- | --

### Circuit/System Description

The fuel pump flow control module (FPCM) monitors the ignition voltage circuit in order to determine if the voltage is within the normal operating range.

### Conditions for Running the DTC

The engine is running.

### Conditions for Setting the DTC

The FPCM detects that the IGN voltage is less than 6.0 volts.

### Action Taken When the DTC Sets

DTC P2534 is a Type A DTC.

### Conditions for Clearing the DTC

DTC P2534 is a Type A DTC.

### Reference Information

#### Schematic Reference

Engine Controls Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Fuel System Description

#### 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

### Circuit/System Testing

1. Verify that DTC P0562 is not set.

⇒ | If DTC P0562 is set, refer to DTC P0562

2. Ignition OFF, disconnect the harness connector of the K27 FPCM.
3. Ignition ON, test for greater than 11 V between the IGN voltage circuit terminal 32 and ground.

⇒ | If less than the specified voltage, test the IGN voltage circuit for a short to ground or an open/high resistance. If the circuit test normal and the F67UA fuse is open, test the voltage circuit for a short to ground. If the circuit tests normal, test or replace the Run/Crank relay.

4. If all circuits test normal, replace the K27 FPCM.

### Repair Instructions

Perform the Diagnostic Repair Verification

• | Relay Replacement

• | Control Module References