P1610

TECHNICAL DESCRIPTION
- PCM monitors the communication condition with the immobilizer-ECU and the message from the immobilizer-ECU, and when the abnormality is found, PCM makes the engine not to start.

DTC SET CONDITIONS

Check Conditions
- Ignition switch: ON

Judgment Criteria
- When the communication error between PCM and the immobilizer-ECU continues for 2 seconds or more.
- When PCM receives the communication of prohibition for starting from the immobilizer-ECU.

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- Malfunction of harness or connector.
- Malfunction of immobilizer-ECU.
- Malfunction of PCM.

DIAGNOSES

Required Special Tools
MB991502: Scan Tool (MUT-II)






CAUTION: To prevent damage to scan tool MB991502, always turn the Ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.

STEP 1. Using scan tool MB991502, read the immobilizer diagnostic trouble code (DTC).
1. Connect scan tool MB991502 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Read the immobilizer system-DTC
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the immobilizer system-DTC is output?

YES: Refer to Ignition Switch and Immobilizer System - Diagnostic Trouble Code Chart. Antitheft and Alarm Systems

NO: If DTC P1610 is output again after the MFI-DTC has been erased, replace the PCM. Then check that the DTC P1610 does not reset.