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DTC P2258

BHE010202200W02

DTC P2258 | AIR pump relay control circuit high
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DETECTION CONDITION | • The PCM monitors the AIR pump relay control voltage when the AIR pump is operating. If the control voltage is more than 11.5 V, the PCM determines that the AIR pump relay control circuit voltage is high. Diagnostic support note • This is a continuous monitor (CCM). • The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM. • PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE | • AIR pump relay malfunction • Connector or terminal malfunction • Short to power supply in wiring harness between AIR pump relay terminal A and PCM terminal 4O • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related service repair information availability. • Is any related repair information available? | Yes | Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | INSPECT AIR PUMP RELAY CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the AIR pump relay connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction? | Yes | Repair or replace the terminal, then go to Step 7.
No | Go to the next step.
4 | INSPECT AIR PUMP RELAY CONTROL CIRCUIT FOR SHORT TO POWER SUPPLY • Turn the ignition switch to the ON position (Engine off). • Measure the voltage between AIR pump relay terminal A (wiring harness-side) and body GND. • Is the voltage B+? | Yes | Repair or replace the wiring harness for a possible short to power supply, then go to Step 7.
No | Go to the next step.
5 | INSPECT AIR PUMP RELAY • Inspect the AIR pump relay. (See RELAY INSPECTION.) • Is there any malfunction? | Yes | Replace the AIR pump relay , then go to Step 7. (See RELAY LOCATION.)
No | Go to the next step.
6 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction? | Yes | Repair or replace the terminal, then go to the next step.
No | Go to the next step.
7 | VERIFY TROUBLESHOOTING OF DTC P2258 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the WDS or equivalent. • Soak the vehicle in a place that is at a temperature of approx. 25 °C {77 °F} for more than 6 hours. • Start the engine. • Verify the SAIR_EVAL PID to Yes. – If not, soak the vehicle again. • Is the PENDING CODE same as DTC present? | Yes | Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION.)
No | Go to the next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE.) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE.)
No | DTC troubleshooting completed.