P2552

DTC P2552: Throttle Actuator Control Module Relay malfunction

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Do the ETCS TEST in the INSPECTION MENU with the HDS.

Is the RELAY circuit OK?

YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the throttle actuator control module relay, the throttle actuator control module, and the PCM.

NO - Go to step 4.

4. Turn the ignition switch OFF.
5. Jump the SCS line with the HDS.




6. Remove the throttle actuator control module relay (A).
7. Disconnect PCM connector E (31P).




8. Check for continuity between PCM connector terminal E3 and body ground.

Is there continuity?

YES - Repair short in the wire between the throttle actuator control module relay and the PCM (E3), then go to step 10.

NO - Go to step 9.

9. Test the throttle actuator control module relay.

Is the relay OK?

YES - Go to step 17.

NO - Replace the throttle actuator control module relay, then go to step 10.

10. Reconnect PCM connector E (31P).
11. Turn the ignition switch ON (II).
12. Reset the PCM with the HDS.
13. Do the PCM idle learn procedure.
14. Turn the ignition switch OFF.
15. Turn the ignition switch ON (II), and wait 10 seconds.
16. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES - If DTC P2552 is indicated, check for poor connections or loose terminals at the throttle actuator control module relay, the throttle actuator control module, and the PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

NO - Troubleshooting is complete.

17. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
18. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES - If DTC P2552 is indicated, check for poor connections or loose terminals at the throttle actuator control module relay, the throttle actuator control module, and the PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM.