SECURITY INDICATOR LIGHT: 16, DTC: U0100:87/P1260:00 [IMMOBILIZER SYSTEM]


id0902e4908600

System malfunction location

Communication error with PCM (no response or data mis-match)

Detection condition
•  The starter stop unit detects a communication error (no response or immobilizer system cancel not possible) with the PCM.
Fail-safe
Possible cause
•  The immobilizer system-related parts have not been programmed when replacing the PCM or start stop unit.
•  Start stop unit malfunction
•  PCM malfunction
System wiring diagram

Diagnostic Procedure

Step

Inspection

Action

1
Perform immobilizer system-related part programming.
•  Perform start stop unit replacement and programming due to simultaneous replacement of start stop unit/PCM.
•  Clear DTC for the immobilizer system using the M-MDS.
•  Perform the DTC inspection for the immobilizer system using the M-MDS.
•  Security indicator light: 16, DTC U0100:87/P1260:00 displayed?
Yes
Go to the next step.
No
Go to Step 4.
2
PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING PART IS START STOP UNIT
•  Clear DTC for the immobilizer system using the M-MDS.
•  Perform the DTC inspection for the immobilizer system using the M-MDS.
•  Security indicator: 16, DTC U0100:87/P1260:00 displayed?
Yes
Replace the start stop unit, then go to the next step.
No
Go to Step 4.
3
PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING PART IS PCM
•  Clear DTC for the immobilizer system using the M-MDS.
•  Perform the DTC inspection for the immobilizer system using the M-MDS.
•  Security indicator: 16, DTC U0100:87/P1260:00 displayed?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
4
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
No
DTC troubleshooting completed.