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10C-11 Immobilizer Control System:
Detecting Condition and Trouble Area
Detecting Condition
ECM detects different ID codes registered in ECM and
keyless start control module.
DTC Confirmation Procedure
1) Engine start knob turn to ON position.
2) Check DTC for ECM.
Troubleshooting
Step
1
Was "Immobilizer Control System Check" performed?
2
Registration of the Ignition Key
1) Clear DTC referring to "Diagnostic Trouble Code (DTC)
Clearance".
2) Register ignition key with ECM referring to "Registration
of the Ignition Key".
Is ignition key able to be registered?
3
Keyless start system operation check
Engine start using keyless start system.
Does engine start?
4
DTC check of ECM
Check DTC for ECM.
Is DTC P1618 and/or P1615 detected other than P1616?
DTC P1618: CAN Communication Error (Reception Error for Keyless Start Control Module) (Vehicle
equipped with keyless start system only)
Detecting Condition and Trouble Area
Detecting Condition
Reception error of communication data for keyless start
control module is detected for longer than specified time
continuously.
DTC Confirmation Procedure
1) Turn Ignition switch to ON position.
2) Check DTC for ECM.
Troubleshooting
Step
1
Was "Immobilizer Control System Check" performed?
2
DTC check of ECM
Is DTC P1674, P1675, P1678 and/or P1685 detected
together?
Action
Action
Trouble Area
• Keyless start control module
• ECM
Yes
Go to Step 2.
Go to Step 3.
Unregistration of remote
controller ID code.
Go to DTC P1618
troubleshooting.
Trouble Area
• CAN communication circuit
• Combination meter
• Keyless start control module
• BCM
• ECM
• ABS/ESP® control module
Yes
Go to Step 2.
Go to applicable DTC
diag. flow.
No
Go to "Immobilizer
Control System Check".
Go to Step 4.
Check DTC for ECM.
When DTC is detected,
go to applicable DTC.
Go to DTC P1615
troubleshooting.
S7RS0BA304011
No
Go to "Immobilizer
Control System Check".
Go to Step 3.
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