Dtc P1625: Immobilizer Antenna Error; Dtc P1636: Immobilizer Information Registration Failure - Suzuki SX4 Service Manual

10C-15 Immobilizer Control System:

DTC P1625: Immobilizer Antenna Error

Wiring Diagram
Refer to "Immobilizer Control System Wiring Circuit Diagram".
Detecting Condition and Trouble Area
Detecting Condition
ICM is faulty.
Troubleshooting
Step
1 Was "Immobilizer Control System Check" performed?
2 DTC confirmation
1) Clear DTC referring to "DTC Clearance".
2) Turn the ignition switch to OFF position.
3) Check DTC referring to "DTC Check".
Is DTC P1625 still detected?

DTC P1636: Immobilizer Information Registration Failure

Wiring Diagram
Refer to "Immobilizer Control System Wiring Circuit Diagram".
Detecting Condition and Trouble Area
Detecting Condition
The registration of the immobilizer control system
information in ECM is failed.
Troubleshooting
Step
1 Was "Immobilizer Control System Check" performed?
2 DTC check of ECM
1) Check ECM for DTC referring to "DTC Check in Section
1A".
Is DTC U0073, U0101, U0121 and/or U0140 detected?
3 DTC check of BCM
1) Check BCM for DTC referring to "DTC Check in Section
10B".
Is DTC U0073, U0100, U0101, U0155 and/or U1144
detected?
Action
Action
Trouble Area
• ICM
• ECM
Yes
Go to Step 2.
Substitute a known-
good ICM and recheck
DTC. If DTC P1625 is
still detected, substitute
a known-good ECM and
recheck.
Trouble Area
• CAN communication circuit
• Keyless start control module (if equipped)
• Combination meter
• TCM (A/T model)
• 4WD control module (if equipped)
• ABS control module
• BCM
• ECM
Yes
Go to Step 2.
Go to applicable DTC
diag. flow.
Go to applicable DTC
diag. flow.
S7RW0AA304015
No
Go to "Immobilizer
Control System Check".
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00".
S7RW0AA304016
No
Go to "Immobilizer
Control System Check".
Go to Step 3.
Go to Step 4.