P1616

DTC P1616: Unregistered Keyless Start Control Module (for Vehicle with Keyless Start System)

Circuit Description

P1616 is detected when ECM detects different ID codes registered in ECM and keyless start control module after turning engine start knob to ON position. Normally, when keyless start control module is replaced with new one, ECM automatically registers the applicable code in keyless start control module after turning ignition switch to ON position. However, when keyless start control module is replaced with used one, ECM does not automatically register the applicable code in keyless start control module even if ignition switch is turned to ON position.

Detecting Condition and Trouble Area






Troubleshooting

1. Diagnostic Trouble Code (DTC) confirmation

Clear DTC(s) referring to DTC Clearance DTC Clearance.
Turn ignition switch to OFF position.
Check if any DTC is detected referring to Immobilizer Control System DTC Table.

Is DTC P1616 still detected?
YES -
Go to Step 2.
NO -
The troubleshooting is completed.

2. Registration of the ignition key

Clear DTC referring to DTC Clearance DTC Clearance.
Register the transponder code in the transponder in the ignition key with ECM referring to Registration of the Ignition Key Registration of the Ignition Key.

Was it possible to register the ignition key (transponder code) in ECM?
YES -
Go to Step 3.
NO -
Go to Step 4.

3. Keyless start system operation check

Start engine using keyless start system.

Does engine start?
YES -
The troubleshooting is completed.
NO -
Check if any DTC is detected by ECM. If detected, perform the troubleshooting referring to the corresponding flowchart.

4. Diagnostic Trouble Code (DTC) check

Check ECM for DTC referring to DTC Check DTC Check.

Are DTC P1618 and/or P1615 detected other than P1616?
YES -
Go to troubleshooting for applicable DTC.
NO -
Substitute a known-good ECM and recheck.