diagnosis SUZUKI SWIFT 2008 2.G Service Workshop Manual
[x] Cancel search | Manufacturer: SUZUKI, Model Year: 2008, Model line: SWIFT, Model: SUZUKI SWIFT 2008 2.GPages: 1496, PDF Size: 34.44 MB
Page 1402 of 1496

Downloaded from www.Manualslib.com manuals search engine 10-ii Table of Contents
DTC P1615: ID Code Does Not Registered (Vehicle equipped with keyless start system 
only) ................................................................10C-9
DTC P1616: Different Registration ID Codes  (Vehicle equipped with keyless start system 
only) ..............................................................10C-10
DTC P1618: CAN Communication Error  (Reception Error for Keyless Start Control 
Module) (Vehicle equipped with keyless 
start system only) ..........................................10C-11
DTC P1621: Immobilizer Communication  Line Error ......................................................10C-12
DTC P1622: EEPROM Reading / Writing  Error ..............................................................10C-13
DTC P1623: Unregistered Transponder .........10C-13
DTC P1625: Immobilizer An tenna Error..........10C-14
DTC P1636: Immobilizer Information  Registration Failure .......................................10C-14
DTC P1638: Immobilizer Information  Mismatched ...................................................10C-15
Inspection of Immobilizer Control Module  (ICM) and Its Circuit ....... ...............................10C-16
Repair Instructions ........... ...............................10C-18
Immobilizer Control Mo dule (ICM) Removal 
and Installation ..............................................10C-18
Registration of the Ignition Key .......................10C-18
Procedure after ECM Replacement ................10C-18
Special Tools and Equipmen t .........................10C-19
Special Tool ....................................................10C-19
Keyless Start System ....... ......................10E-1
General Description ........................................... 10E-1
Keyless Start System Description ..................... 10E-1
Parts and Functions .......................................... 10E-2
Keyless Engine Start Function .......................... 10E-3
Door Lock Function of Keyless Start System .... 10E-4
Operation Area of Remote  Controller................ 10E-5
Alarm Function .................................................. 10E-6
CAN Communication System Description......... 10E-6
Schematic and Routing Diagram ...................... 10E-7 Keyless Start System El ectric Wiring Circuit 
Diagram .......................................................... 10E-7
Diagnostic Information and Procedures .......... 10E-8 Precautions in Diagnosing Troubles ................. 10E-8
Self-Diagnosis Function .................................... 10E-8
Keyless Start System Diagn osis Introduction ... 10E-8 Keyless Start System Chec
k ............................. 10E-8
Customer Questionnaire (E xample) .................. 10E-9
Key Indicator Lamp Check .............................. 10E-10
DTC Check...................................................... 10E-10
DTC Table ....................................................... 10E-11
DTC Clearance ............................................... 10E-12
Keyless Start System Symp tom Diagnosis ..... 10E-12
Keyless Start System Operation Inspection .... 10E-13
Door Lock Operation (Keyless Start System) . 10E-14
Inspection of Keyless Start Control Module  and Its Circuits .............................................. 10E-14
No DTC Detection After Performing DTC  Check ............................................................ 10E-18
Key Indicator Lamp Circuit Check (Key  indicator lamp doesn’t light when ignition 
knob switch is pushed.) ................................. 10E-20
Keyless Start Control Module Power and  Ground Circuit Check .................................... 10E-22
DTC No. 11: Communi cation Error with 
Steering Lock Unit ......................................... 10E-23
DTC No. 13 / No. 14: Release Signal Error  from Steering Lock Unit / Steering Lock Unit 
Malfunction .................................................... 10E-24
DTC No. 21 / No. 22: Internal Error of Keyless  Start Control Module  (EEPROM reading 
error) / (EEPROM writing error) ............ ........ 10E-24
DTC No. 31: Lost Commun ication with BCM .. 10E-25
DTC No. 33: Control Module Communication 
Bus Off .......................................................... 10E-27
DTC No. 51 / No. 52 / No. 53: Driver Side /  Passenger Side / Rear End Door Request 
Switch Failure................................................ 10E-28
Repair Instructions ............ .............................. 10E-30
Antennas and Request Switches Removal  and Installation .............................................. 10E-30
Front Door (Driver and Passenger Side), Rear  End Door Request Switch  Inspection............ 10E-31
Steering Lock Unit Removal and Installation .. 10E-31
Steering Lock Unit Inspection ......................... 10E-31
Front Door Lock Switch In spection ................. 10E-31
Keyless Start Control Module Removal and  Installation ..................................................... 10E-32
Remote Controller Inspection.......................... 10E-32
Replacement of Remote Controller Battery .... 10E-32
Registration Procedure  for Remote Controller 
ID Code ......................................................... 10E-33  
Page 1409 of 1496
![SUZUKI SWIFT 2008 2.G Service Workshop Manual Downloaded from www.Manualslib.com manuals search engine Body Electrical Control System:  10B-6
[A]: Vehicle not equipped with diagnosis connector 19. Door key cylinder switch (included in door lock a SUZUKI SWIFT 2008 2.G Service Workshop Manual Downloaded from www.Manualslib.com manuals search engine Body Electrical Control System:  10B-6
[A]: Vehicle not equipped with diagnosis connector 19. Door key cylinder switch (included in door lock a](/img/20/7607/w960_7607-1408.png)
Downloaded from www.Manualslib.com manuals search engine Body Electrical Control System:  10B-6
[A]: Vehicle not equipped with diagnosis connector 19. Door key cylinder switch (included in door lock actuator)40. SDM
[B]: Vehicle equipped with diagnosis conn ector 20. Manual door lock switch 41. Rear end door window defogger relay
[C]: ESP ® model 21. Rear end door window defogger switch 42. Rear end door window defogger
1. BCM (included in junction block assembly) 22. Rear end door opener switch 43. Rear end door window defogger indicator lamp
2. Rear washer motor 23. “3” position switch (A/T model)44. Horn relay
3. Rear wiper motor 24. A/C switch45. Horn switch
4. Rear wiper relay 25. Rear end door opener relay46. Horn
5. Rear wiper and washer switch 26. Rear end door opener actuator47. Lighting switch
6. Outside air temperature sensor 27. TCM (A/T model)48. Ignition switch
7. Key reminder switch 28. ECM49. Battery
8. Theft deterrent light 29. Combination meter50. To turn signal light
9. Oil pressure switch 30. Data link connector (DLC)51. Body ground
10. Generator 31. To ECM, ABS/ESP®, P/S control module 52. Engine ground
11. Information display (if equipped) 32. To SDM53. Keyless start control module (if equipped)
12. Keyless entry receiver (if equipped) 33. Door lock actuator relay 54. Right side door mirror heater (if equipped)
13. Driver side door switch 34. Driver side door lock actuator55. Left side door mirror heater (if equipped)
14. Other than driver side door switch 35. Passenger side door lock actuator56. ABS/ESP® control module
15. Rear end door switch 36. Rear door lock actuator57. To HVAC control module
16. Driver side seat belt switch 37. Turn signal and hazard warning relay 58. CAN junction connector
17. Brake fluid level switch 38. Hazard warning switch59. Steering angle sensor
18. Parking brake switch 39. Interior light  
Page 1412 of 1496

Downloaded from www.Manualslib.com manuals search engine 10B-9 Body Electrical Control System: 
Diagnostic Information and Procedures
BCM Self-Diagnosis FunctionS7RS0BA204001
• BCM monitors conditions of the system components and its circuit with ignition switch turned to ON position. When 
an abnormality in the system oc curs, the area where that abnormality lies is stored in the memory of EEPROM in 
BCM.
• DTC can be checked in either one of following ways. – DTC can be checked by SUZUKI scan tool (2) connected to DLC (1).
– DTC can be read from flashing pattern  of theft deterrent light (3). Also, DTC is displayed on combination meter 
(4) at the same time.
BCM input / output table
4. Oil pressure switch 15. Rear end door window defogger switch 26. Rear wiper relay
5. Outside air temperature sensor (if  equipped) 16. A/C switch
27. Rear end door window defogger relay
6. Door lock actuator  (incorporated in key cylinder switch) 17. Hazard warning switch
28. Turn signal and hazard warning relay
7. Door switch 18. Rear wiper switch 29.  Key reminder switch (included in ignition switch)
8. Interior light 19. Lighting switch
9. Rear end door opener switch 20. Manual door lock switch
3
1
2
4I4RS0BA20004-03
Control
Input Output
Power door lock system • Key cylinder switch
• Manual door lock switch • Each door lock actuator
Keyless entry system • Key reminder switch
• Keyless entry receiver
• Driver side door switch • Each door lock actuator
• Turn signal and hazard warning relay
• Interior light
Keyless start system
(Door lock function) • Keyless start control module
• Each door lock actuator
• Turn signal and hazard warning relay
• Interior light
Rear wiper  • Rear wiper INT switch
• Rear wiper LO switch • Rear wiper relay
Combination meter • Tail light switch
• Oil pressure switch
• Parking brake switch
• Driver side seat belt switch
• Brake fluid level switch
• Generator
• Each door switch • Combination meter  
Page 1413 of 1496

Downloaded from www.Manualslib.com manuals search engine Body Electrical Control System:  10B-10
Body Electrical Control System CheckS7RS0BA204002
Interior light• Each door switch
• Key reminder switch • Interior light
Warning buzzer • Key reminder switch
• Tail light switch
• Driver side door switch
• TCM (reverse signal) (if equipped)
• ECM (vehicle speed signal)
• Keyless start control module (if equipped) • Warning buzzer (located in BCM)
Rear end door window 
defogger • Rear end door window defogger switch
• Generator • Rear end door window defogger 
relay
Rear end door opener • Manual door lock switch (unlock signal)
• Key cylinder switch (unlock signal)
• Keyless entry transmitter (unlock signal) (if 
equipped)
• Rear end door opener switch • Rear end door opener relay
Theft deterrent light • Key reminder switch • Theft deterrent light (located in 
information display or clock)
Control Input Output
Step
Action YesNo
1  ) Customer complaint analysis
1) Perform customer complaint analysis.
Was customer complaint analysis performed? Go to Step 2.
Perform customer 
complaint analysis.
2  ) Problem symptom confirmation
1) Perform problem symptom confirmation.
Does trouble recur? Go to Step 3.
Go to Step 7.
3  ) DTC check
1) Check DTC.
Is it malfunction code? Go to Step 4.
Go to Step 5.
4  ) Troubleshooting for DTC
1) Check and repair according to DTC diag. flow.
Are check and repair completed? Go to Step 7.
Check and repair 
malfunction part(s).
5  ) Body electrical control system symptom diagnosis
1) Perform check and repair referring to “Symptom  Diagnosis” of system having a trouble.
Is there faulty condition? Repair or replace 
malfunction part(s).
Go to Step 6.
6  ) Check for intermittent problem
1) Check for interm ittent problem.
Is there faulty condition? Repair or replace 
malfunction part(s).
Go to Step 7.
7  ) Final confirmation test
1) Clear DTC referring to “DTC Clearance”.
2) Check DTC referring to “DTC Check”.
Is there any DTC? Go to Step 4.
End.  
Page 1414 of 1496

Downloaded from www.Manualslib.com manuals search engine 10B-11 Body Electrical Control System: 
Customer Complaint Analysis
Record details of the problem (failure, complaint) and how it occurred as described by the customer.
For this purpose, use of such a questionnaire form as shown in figure will facilitate collectin g information to the point 
required for proper analysis and diagnosis. Customer questionnaire (example)
Problem Symptom Confirmation
Check if what the custom er claimed in “Customer 
Questionnaire” is accurately f ound in the vehicle. If that 
symptom is found, check whether the symptom is 
identified as a failure. (This step should be shared with 
the customer if possible.)
DTC Check
Check DTC stored in BCM me mory referring to “DTC 
Check”, record it and then clear it referring to “DTC 
Clearance”. DTC indicates malfunction that occurred in 
the system but does not indicate  whether it exists now or 
it occurred in the past and the normal condition has been 
restored now. To check which case applies, clear DTC 
once and check whether or not any fault exists.
Troubleshooting for DTC
Based on the DTC indicated in Step 3 and referring to 
applicable DTC flow, locate the cause of the trouble, 
namely in a sensor, wire harness, connector, BCM or 
other part and repair or replace faulty parts. Body Electrical Control System Symptom Diagnosis
Check the parts or system 
suspected as a possible 
cause referring to symptom diagnosis of each system.
Check for Intermi ttent Problem
Check parts where an intermit tent trouble is easy to 
occur (e.g., wire harness, connector, etc.), referring to 
“Intermittent and Poor Connec tion Inspection in Section 
00”.
Final Confirmation Test
Confirm that the problem symptom has gone and the 
body electrical control system is free from any abnormal 
conditions. If what has been repaired is related to the 
malfunction DTC, check DTC  again and confirm that no 
DTC is indicated.
Customers name: 
  Model: 
 VIN: 
 
Date of issue: 
  Date Reg: 
 Date of problem: 
  Mileage: 
 
Problem Symptoms
Power door lock system does not operate
Keyless entry system does not operate  
Rear end door window defogger does not operate
Rear wiper does not operate
Rear end door opener does not operate  
Other            
Frequency of Occurrence 
Continuous / Intermittent (       times a day, a month) 
/ Other          
 
Environmental Condition  
Weather:  
Fine / Cloudy / Rain / Snow / Other          
 
Temperature:    (F ) 
Diagnostic Trouble Code  Normal code / Malfunction code (           )
 
Warning buzzer does not sound
Interior light does not light
Theft deterrent light does not flush
I5RS0DA20006-01  
Page 1416 of 1496

Downloaded from www.Manualslib.com manuals search engine 10B-13 Body Electrical Control System: 
Scan Tool Data Definitions
Vehicle Speed (km/h, mph):  It is computed based on pulse signals from vehicle speed sensor on transmission.
Outside air Temp ( °C,  °F):   It is detected by outside air temperature sensor.
Battery Voltage (V):   This parameter indicates battery po sitive voltage inputted to BCM.
Coolant Temp (Engine coolant temperature) ( °C,  °F):   It is detected by engine coolant temperature sensor.
Engine Speed (RPM):   It is computed by reference pulse signals from CMP sensor.
Fuel Consumption (km/l):   This parameter indicates the fuel consumption computed by ECM.
Key Reminder Sw (Key reminder  switch) (Pulled / Key in):  This parameter indicates the state of the key reminder 
switch.
Rear Wiper Sw (Rear wiper switch) (ON / INT / OFF):   This parameter indicates the state of the rear wiper switch.
Door key Sw (Door key cylinder switch) (Lock / Neutral / Unlock):   This parameter indicates the state of the door 
key cylinder switch.
Door lock Sw (Manual door lock switch) (Lock / Neutral / Unlock):   This parameter indicates the state of the 
manual door lock switch.
Driv Door Sw (Driver side d oor switch) (Open / Close):   This parameter indicates the state of the driver side door 
switch.
Pass Door Sw (Other than driver  side door switch) (Open / Close):   This parameter indicates the state of the door 
switches other than driver side door switch.
Brake Fluid Level (Low / Normal):   Low: Brake fluid level is lower than specified level.
Normal: Brake fluid level  is higher than MIN level.
Parking Brake Sw (Parking brake switch) (ON / OFF):   ON: Parking brake lever is pulled up.
OFF: Parking brake lever is released.
Rear Defogger Sw (Rear end door window defogger switch) (ON / OFF):   This parameter indicates the state of 
the rear end door window defogger switch.
Tail Light Sw (Lighting switch) (ON / OFF):   This parameter indicates the state of the lighting switch.
Driv Seatbelt Sw (Driver seat belt switch) (Fasten / Unfasten):   This parameter indicates the state of the driver 
side seat belt buckle switch.
Rear end Door Opener (Rear end door opener switch) (ON / OFF):   This parameter indicates the state of the rear 
end door opener switch.
“3” position Sw (ON/OFF):   This parameter indicates the state of the “3 ” position switch included in A/T manual 
selector assembly.
Charge lamp (ON / OFF):   This parameter indicates the state of the charge system monitor switch.
Oil pressure switch (ON / OFF):   This parameter indicates the state of the oil pressure switch.
A/C Switch (ON / OFF):   This parameter indicates the state of the air conditioning switch.
Diagnosis Using Output Test Function of SUZUKI Scan Tool
SUZUKI scan tool has the output test  function which can force operation of following actuators and relays of the 
system controlled by BCM. When a malf unction is found in the system controlled by BCM, execute the output test 
which enables easy judgment whether the malfunction is on the input side or output side of BCM. For detailed 
information on operation of SUZUKI scan tool,  refer to “SUZUKI Scan Tool Operator’s Manual”.
Output Teat Item Controlled Parts
Hazard Warning Light Turn signal and hazard warning relay
Interior (Dome) Light Interior (Dome) light (wh en interior light switch is at DOOR position)
Door Each door lock actuator
Rear end door open Rear end door opener relay
Warning buzzer Warning buzzer (in BCM)
Rear wiper Rear wiper relay
Alarm indicator Theft deterrent light  (in information display or clock)
Rear defogger Rear end door window defogger relay  
Page 1446 of 1496

Downloaded from www.Manualslib.com manuals search engine 10C-3 Immobilizer Control System: 
Immobilizer Control System Components LocationS7RS0BA301002
On-Board Diagnostic System Description (Self-diagnosis Function)S7RS0BA301003
ECM diagnoses if there is any trouble  with the immobilizer control system. The diagnostic information is stored as the 
diagnostic trouble code (DTC) in ECM. To read the di agnostic information, use SUZUKI scan tool referring to 
“Diagnostic Trouble Code (DTC) Check”.
With the ignition switch turned ON (but  the engine at stop) regardless of the condition of the engine and emission 
control system, ECM indicates whether ther e is any trouble with the immobilizer control system or not by either lighting 
ON or flashing ON and OFF t he immobilizer indicator lamp.
Immobilizer indicator lamp lights ON:
No trouble exists in the immobilizer  control system. (After starting up the engine, the light turns OFF.)
Immobilizer indicator lamp flashes ON and OFF:
There is some trouble in the immo bilizer control system. Its diagnostic information is stored in ECM.
13
4
56
7
2
I6RS0CA30001-01
1. ECM 4. Ignition key with keyless entry system 7. Transponder
2. Immobilizer indicator lamp 5. Ignition key without keyless entry system
3. Immobilizer control module (ICM) 6. Ignition key with keyless start system  
Page 1448 of 1496

Downloaded from www.Manualslib.com manuals search engine 10C-5 Immobilizer Control System: 
Diagnostic Information and Procedures
Immobilizer Control System CheckS7RS0BA304001
Diagnostic Trouble Code (DTC) CheckS7RS0BA304002
NOTE
To know how to use SUZUKI scan tool in 
detail, refer to its operator’s manual.
 
Using Scan Tool
1) Turn the ignition switch to OFF position.
2) Connect SUZUKI scan tool to data link connector  (DLC) (1) located under instrument panel at driver’s 
seat side.
Special tool
(A):  SUZUKI scan tool 3) Turn the ignition switch to ON position.
4) Check if any DTC is stored
 in ECM according to the 
instructions displayed on SUZUKI scan tool. 
5) After completing the check,  turn ignition switch to 
OFF position, and then di sconnect SUZUKI scan 
tool from DLC.
Using Diagnosis Connector (If equipped)
Refer to “Without Using Scan Tool (Vehicle Equipped 
with Diagnosis Connector)” under “DTC Check in 
Section 1A”.
Step Action Yes No
1 Immobilizer indicator lamp check
Turn ignition switch to ON position using ignition key.
Does it immobilizer in dicator lamp come on? Go to Step 2.
Check if DTC P1636 
and/or P1638 are 
detected by ECM 
referring to “Diagnostic 
Trouble Code (DTC) 
Check”. If detected, go 
to applicable DTC diag. 
flow. If not detected, go 
to “Immobilizer Indicator 
Lamp Does Not Come 
ON with Ignition Switch 
ON and Engine Stop”.
2 Immobilizer indicator lamp check
Does it immobilizer indicato r lamp flashes on and off 
continuously in Step 1? Check ECM for DTC 
referring to “Diagnostic 
Trouble Code (DTC) 
Check”. Then, Go to 
applicable DTC diag. 
flow.Go to Step 3.
3 Engine start check
Start engine using ignition key.
Does engine start? Go to Step 4.
Perform “Engine and 
Emission Control 
System Check in 
Section 1A”.
4 Immobilizer indicator lamp check
Check Immobilizer indicator la mp remains ON after engine 
start.
Does immobilizer indicator la mp remains ON after engine 
start? Go to “Immobilizer 
Indicator Lamp 
Remains ON after 
Engine Starts”.
Immobilizer system is 
good condition. Then go 
to “Keyless Start 
System Check in 
Section 10E”. (Vehicle 
equipped with keyless 
start system only)
(A)1
I4RS0BA30003-03  
Page 1449 of 1496

Downloaded from www.Manualslib.com manuals search engine Immobilizer Control System:  10C-6
Diagnostic Trouble Code (DTC) ClearanceS7RS0BA304003
NOTE
To know how to use SUZUKI scan tool in 
detail, refer to its operator’s manual.
 
Using Scan Tool
1) Turn the ignition switch to OFF position,
2) Connect SUZUKI scan tool to data link connector  (DLC) (1) located under instrument panel at driver’s 
seat side.
Special tool
(A):  SUZUKI scan tool 3) Turn the ignition switch to ON position.
4) Clear DTC(s) according to the instructions displayed 
on SUZUKI scan tool.
5) After completing the clearance, turn the ignition  switch to OFF position, and then disconnect SUZUKI 
scan tool from DLC.
Using Diagnosis Connector (If Equipped)
Refer to “Without Using Scan Tool” under “DTC 
Clearance in Section 1A”.
Diagnostic Trouble Code (DTC) TableS7RS0BA304004
ECM
NOTE
If any DTC other than the above DTCs is detected, refer to “DTC Table in Section 1A”. 
 
(A)1
I4RS0BA30003-03
DTC No. Detecting Item Detecting ConditionImmobilizer 
Indicator Lamp
P1614 Transponder Response Error Transponder code in the transponder built in 
the ignition key cannot be read through ICM.Flash
P1615 ID Code Does Not Re
gistered (Vehicle 
equipped with Keyless Start System only) • While registering the transponder code in 
the transponder built in the ignition key in 
ECM, the keyless start control module 
sent a signal to ECM indicating that the ID 
code could not be registered.
• The ID code could not be registered in the  keyless start control module or ECM. Flash
P1616 Different Registration ID Codes (Vehicle 
equipped with Keyless Start System only) ECM detects different ID codes registered in 
ECM and keyless start system.
Flash
P1618 CAN Communication Error (Reception Error 
for Keyless Start Control Module) (Vehicle 
equipped with Keyless Start System only) Reception error communication data for 
keyless start control module is detected for 
longer than specified time continuously.
Flash
P1621 Immobilizer Commu nication Line ErrorCommunication error between ICM and 
ECM is detected by ECM. Flash
P1622 EEPROM Reading / Writing Error EEPROM in ECM is corrupted.Flash
P1623 Unregistered Transponder Transponder code in the transponder built in 
the ignition key is invalid.Flash
P1625 Immobilizer Antenna Error ICM is faulty.Flash
P1636 Immobilizer Information Registration Failure Communication error between ECM and 
BCM is detected by ECM.No operation
P1638 Immobilizer Info rmation Mismatched • Communication error between ECM and 
BCM is detected by ECM
• Wrong ECM or BCM is used. No operation  
Page 1470 of 1496

Downloaded from www.Manualslib.com manuals search engine 10E-8 Keyless Start System: 
Diagnostic Information and Procedures
Precautions in Diagnosing TroublesS7RS0BA504001
• The keyless start system executes data transmission/reception by means of th e radio wave. Therefore, 
proper operation may not be obtained if use of the 
door lock function and engine start function of the 
keyless start system is attempted near the place 
where strong radio wave is emitted (TV and radio 
broadcasting stations, etc.).
• Diagnostic information stored  in keyless start control 
module memory can be checked only by key indicator 
lamp.
• Be sure to use the trouble diagnosis procedure as  described in “Keyless Start  System Check”. Failure to 
follow it may result in incorrect diagnosis. (Some other 
DTC may be stored by mistake in the memory of 
keyless start control module during inspection.)
• Be sure to read “Precautions for Electrical Circuit  Service in Section 00” befo re inspection and observe 
what is written there.
• Communication of ECM, BCM, TCM (A/T model),  ABS control module, keyless start control module and 
combination meter is estab lished by CAN (Controller 
Area Network). (For detail of CAN communication for 
keyless start control module, refer to “CAN 
Communication System Description”). Therefore, 
handle CAN communication line with care referring to 
“Precaution for CAN Communication System in 
Section 00”. • Replacement of the keyless start control module
When keyless start control module is replaced with 
new one, make sure that r egister remote controller ID 
code to keyless start co ntrol module correctly 
according to “Registration Procedure for Remote 
Controller ID Code”.
• Keyless start control module substitution When the keyless start control module used in 
another vehicle was installed in the vehicle, register 
the ID code of the remote controller in the keyless 
start control module as well as the ignition key 
transponder code fo r the immobilizer control system in 
ECM. For the registration procedure of the ignition key 
transponder code, refer to “Registration of the Ignition 
Key in Section 10C”.
Self-Diagnosis FunctionS7RS0BA504002
The keyless start control module has self-diagnosis 
function to monitor the system components and circuits 
while the keyless start system is at work. When the 
keyless start control module detects an abnormality in 
the system, it saves the ar ea where such abnormality 
has occurred as a DTC in its memory. The DTC stored in 
memory of the keyless start control module is indicated 
by the key indicator lamp  in the combination meter 
flashing in a specific pattern. For DTC indication, refer to 
“DTC Check” and for the clearing procedure, to “DTC 
Clearance”.
Keyless Start System Diagnosis IntroductionS7RS0BA504003
To ensure that the trouble diagnosis is done accurately 
and smoothly, observe “Precautions in Diagnosing 
Troubles” and follow “Keyless Start System Check”.
Keyless Start System CheckS7RS0BA504004
Step Action YesNo
1 1) Record details of the problem. For your record, use of a  questionnaire form will facilit ate collecting information for 
proper analysis and diagnosis.
2) Check if the problem described in “Customer  Questionnaire (Example)” actually occurs in the vehicle. 
(This step should be performed with the customer if 
possible.)
Perform “Keyless Start System Operation Inspection” 
procedure to check if the symptom which has occurred is 
abnormal or not.
3) Check for DTC referring to “DTC Check”, and then  record DTC(s).
4) Clear DTC referring to “DTC Clearance” if any DTC  exists, and then recheck for DTC.
Is any DTC still detected? Go to Step 2.
Go to Step 3.
2 1) Check and repair referring to applicable “DTC Table”. Are check and repair complete? Go to Step 5.
Check and repair 
malfunction part(s), and 
go to Step 5.