10C-15 Immobilizer Control System:
DTC P1638: Immobilizer Information Mismatched
S6RW0CA304017
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.
Detecting Condition and Trouble Area
Troubleshooting
5
Replacement of BCM
1) Replace BCM with new one referring to “BCM (Included
in Junction Block) Removal and Installation in Section
10B”.
2) Check ECM for DTC referring to “DTC Check”.
Is DTC P1636 still detected?
Substitute a known-
good ECM and recheck.
BCM faulty.
Step
Action
Yes
No
Detecting Condition
Trouble Area
• The immobilizer control system information in ECM and
the one in BCM does not match.
• The registration of the immobilizer control system
information in ECM is failed.
• Use of the wrong ECM
• 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
Step
Action
Yes
No
1
Was “Immobilizer Control System Check” performed?
Go to Step 2.
Go to “Immobilizer
Control System Check”.
2
DTC confirmation
1) Disconnect negative (–) cable from battery for more than
5 seconds.
2) Connect negative (–) cable to battery.
3) Check if any DTC is detected referring to “DTC Check”.
Is DTC P1638 still detected?
Go to Step 3.
Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
3
ECM specification check
1) Check ECM part number to see if ECM is applicable to
the vehicle in service.
Is a correct ECM used for the vehicle in service?
Go to Step 4.
Replace ECM with the
correct one and recheck
if DTC P1638 is still
detected by ECM.
4
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?
Go to applicable DTC
diag. flow.
Go to Step 5.
5
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?
Go to applicable DTC
diag. flow.
Go to Step 6.
Содержание 2006 SX4
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Страница 1382: ...9L 8 Paint Coatings I5RW0C9C0006 01 A Apply sealant covering flange end...
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Страница 1476: ...Prepared by 1st Ed Feb 2007...
Страница 1477: ...31 0 mm 99500 80J00 01E SERVICE MANUAL VOL 1 OF 2 99500 80J00 01E SERVICE MANUAL VOLUME 1 OF 2 RW420...
Страница 1478: ...28 0 mm 99500 80J00 01E SERVICE MANUAL VOL 2 OF 2 99500 80J00 01E SERVICE MANUAL VOLUME 2 OF 2 RW420...