Qashqai J11. Driveline — part 3
DIAGNOSIS AND REPAIR WORK FLOW
DLN-33
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
Work Flow
INFOID:0000000010755247
DETAILED FLOW
1.
INTERVIEW FROM THE CUSTOMER
Clarify customer complaints before inspection. First of all, perform an interview utilizing
and reproduce symptoms as well as fully understand it. Ask customer about his/her complaints
carefully. Check symptoms by driving vehicle with customer, if necessary.
CAUTION:
Customers are not professional. Never guess easily like “maybe the customer means that...,” or
“maybe the customer mentions this symptom”.
>> GO TO 2.
2.
CHECK SYMPTOM
Reproduce the symptom that is indicated by the customer, based on the information from the customer
obtained by interview. Also check that the symptom is not caused by protection function. Refer to
CAUTION:
When the symptom is caused by normal operation, fully inspect each portion and obtain the under-
standing of customer that the symptom is not caused by a malfunction.
>> GO TO 3.
3.
PERFORM SELF-DIAGNOSIS
With CONSULT
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is any DTC detected?
YES
>> Record or print self-diagnosis results. GO TO 4.
NO
>> GO TO 6.
4.
RECHECK SYMPTOM
With CONSULT
1.
Erase self-diagnostic results for “ALL MODE AWD/4WD”.
2.
Perform DTC confirmation procedures for the error detected system.
NOTE:
If some DTCs are detected at the same time, determine the order for performing the diagnosis based on
26, "DTC Inspection Priority Chart"
Is any DTC detected?
YES
>> GO TO 5.
NO
>> Check harness and connectors based on the information obtained by interview. Refer to
.
5.
REPAIR OR REPLACE ERROR-DETECTED PARTS
• Repair or replace error-detected parts.
• Reconnect part or connector after repairing or replacing.
• When DTC is detected, erase self-diagnostic results for “ALL MODE AWD/4WD”.
>> GO TO 7.
6.
IDENTIFY ERROR-DETECTED SYSTEM BY SYMPTOM DIAGNOSIS
Estimate error-detected system based on symptom diagnosis and perform inspection.
Can the error-detected system be identified?
DLN-34
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DIAGNOSIS AND REPAIR WORK FLOW
YES
>> GO TO 7.
NO
>> Check harness and connectors based on the information obtained by interview. Refer to
.
7.
FINAL CHECK
With CONSULT
1.
Check the reference value for 4WD control unit.
2.
Recheck the symptom and check that symptom is not reproduced on the same conditions.
Is the symptom reproduced?
YES
>> GO TO 3.
NO
>> INSPECTION END
Diagnostic Work Sheet
INFOID:0000000010755248
Description
• In general, customers have their own criteria for a problem. Therefore, it is important to understand the
symptom and status well enough by asking the customer about his/her concerns carefully. To systemize all
the information for the diagnosis, prepare the interview sheet referring to the interview points.
• In some cases, multiple conditions that appear simultaneously may cause a DTC to be detected.
Interview sheet sample
Interview sheet
Customer
name
MR/MS
Registration
number
Initial year
registration
Vehicle type
VIN
Storage date
Engine
Mileage
km (Mile)
Symptom
Vehicle does not enter 4WD mode.
4WD warning (4WD Error) is displayed.
Heavy tight-corner braking symptom occurs
Noise
Vibration
Others
(
)
First occurrence
Recently
Others (
)
Frequency of occurrence
Always
Under a certain conditions of
Sometimes (time(s)/day)
Climate con-
ditions
Irrelevant
Weather
Fine
Cloud
Rain
Snow
Others (
)
Temperature
Hot
Warm
Cool
Cold
Temperature (Approx.
°
C)
Relative humidity
High
Moderate
Low
Road conditions
Urban area
Suburb area
High way
Mounting road (uphill or down hill)
Rough road
Operation conditions, etc.
Irrelevant
When engine starts
During idling
During driving
During acceleration
At constant speed driving
During deceleration
During cornering (right curve or left curve)
DIAGNOSIS AND REPAIR WORK FLOW
DLN-35
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Other conditions
Memo
Interview sheet
Customer
name
MR/MS
Registration
number
Initial year
registration
Vehicle type
VIN
Storage date
Engine
Mileage
km (Mile)
DLN-36
< BASIC INSPECTION >
[TRANSFER: TY21C]
ADDITIONAL SERVICE WHEN REPLACING 4WD CONTROL UNIT
ADDITIONAL SERVICE WHEN REPLACING 4WD CONTROL UNIT
Description
INFOID:0000000010755249
When replacing 4WD control unit, unit characteristics writing is required.
Work Procedure
INFOID:0000000010755250
1.
PERFORM WRITING UNIT CHARACTERISTICS
Perform writing unit characteristics of electric controlled coupling.
>> Refer to
UNIT CHARACTERISTICS WRITING
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UNIT CHARACTERISTICS WRITING
Description
INFOID:0000000010755251
When replacing 4WD control unit, rear final drive assembly and/or electric controlled coupling, unit character-
istics of electric controlled coupling writing is required.
Work Procedure
INFOID:0000000010755252
1.
UNIT CHARACTERISTICS WRITING
With CONSULT
1.
Confirm the unit characteristics of electric controlled coupling.
NOTE:
Unit characteristics is 12-digit alphanumeric.
2.
Turn the ignition switch OFF to ON.
3.
Select “UNIT CHARACTERISTICS WRITE” in “WORK SUP-
PORT” for “ALL MODE AWD/4WD”.
4.
Input unit characteristics.
5.
Select “Start”.
6.
Check that “UNIT CHARACTERISTICS WRITE COMPLETED”
is displayed.
>> WORK END
JSDIA5446ZZ
DLN-38
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TY21C]
C1201 4WD CONTROL UNIT
DTC/CIRCUIT DIAGNOSIS
C1201 4WD CONTROL UNIT
DTC Description
INFOID:0000000010755253
DTC DETECTION LOGIC
POSSIBLE CAUSE
Internal malfunction of 4WD control unit
FAIL-SAFE
4WD control changes to front-wheel drive immediately, then 4WD control stops, and the vehicle becomes
front-wheel drive.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
DTC REPRODUCTION PROCEDURE
With CONSULT
1.
Turn the ignition switch OFF to ON.
2.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “C1201” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO-1
>> To check malfunction symptom before repair: Refer to
GI-41, "Intermittent Incident"
.
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010755254
1.
PERFORM SELF-DIAGNOSIS
With CONSULT
1.
Erase self-diagnostic results for “ALL MODE AWD/4WD”.
2.
Turn the ignition switch OFF, and then wait 10 seconds or more.
3.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “C1201” detected?
YES
>> Replace 4WD control unit. Refer to
DLN-72, "Removal and Installation"
NO
>> Check 4WD control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace error-detected parts.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
C1201
CONTROLLER FAILURE
(Control unit failure)
Malfunction has occurred inside 4WD control unit.
C1203 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
DLN-39
< DTC/CIRCUIT DIAGNOSIS >
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C1203 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
DTC Description
INFOID:0000000010755255
DTC DETECTION LOGIC
POSSIBLE CAUSE
ABS malfunction
• Vehicle speed signal error
FAIL-SAFE
4WD control changes to front-wheel drive gradually (rear-wheels still have some driving torque), then 4WD
control stops, and the vehicle becomes front-wheel drive.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
DTC REPRODUCTION PROCEDURE
With CONSULT
1.
Drive at 30 km/h (19 MPH) or more for approximately 1 minute.
2.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “C1203” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO-1
>> To check malfunction symptom before repair: Refer to
GI-41, "Intermittent Incident"
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010755256
1.
PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
With CONSULT
Perform self-diagnosis for “ABS”.
Is any DTC detected?
YES
>> Check the DTC. Refer to
.
NO
>> GO TO 2.
2.
CHECK TERMINALS AND HARNESS CONNECTORS
Check 4WD control unit pin terminals for damage or loose connection with harness connector.
Is inspection result normal?
YES
>> After turning the ignition switch OFF, perform DTC confirmation procedure again. If DTC “C1203”
is detected, Replace 4WD control unit. Refer to
DLN-72, "Removal and Installation"
NO
>> Repair or replace error-detected parts.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
C1203
ABS SYSTEM
(ABS system)
Malfunction related to wheel sensor has been detected by
ABS actuator and electric unit (control unit).
DLN-40
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TY21C]
C1204 4WD SOLENOID
C1204 4WD SOLENOID
DTC Description
INFOID:0000000010755257
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Internal malfunction of electronic controlled coupling
• Malfunction of 4WD solenoid power supply circuit (open or short)
• Malfunction of 4WD solenoid command current
FAIL-SAFE
4WD control changes to front-wheel drive immediately, then 4WD control stops, and the vehicle becomes
front-wheel drive.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
DTC REPRODUCTION PROCEDURE
With CONSULT
1.
Turn the ignition switch OFF to ON.
2.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “C1204” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO-1
>> To check malfunction symptom before repair: Refer to
GI-41, "Intermittent Incident"
.
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010755258
1.
CHECK 4WD SOLENOID POWER SUPPLY (1)
1.
Turn the ignition switch OFF.
2.
Disconnect 4WD control unit harness connector.
3.
Check the voltage between 4WD control unit harness connector and ground.
4.
Turn the ignition switch ON.
CAUTION:
Never start the engine.
5.
Check the voltage between 4WD control unit harness connector and ground.
Is the inspection result normal?
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
C1204
4WD SOLENOID
(4WD solenoid)
Malfunction related to 4WD solenoid has been detected.
4WD control unit
—
Voltage
Connector
Terminal
B5
9
Ground
Battery voltage
4WD control unit
—
Voltage
Connector
Terminal
B5
9
Ground
Battery voltage
C1204 4WD SOLENOID
DLN-41
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YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK 4WD SOLENOID POWER SUPPLY (2)
1.
Turn the ignition switch OFF.
2.
Check the 10A fuse (#6).
3.
Disconnect fuse block (J/B) harness connector.
4.
Check the continuity between 4WD control unit harness connector and fuse block (J/B) harness connec-
tor.
5.
Check the continuity between 4WD control unit harness connector and the ground.
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit. Refer to
NO
>> Repair or replace error-detected parts.
3.
CHECK 4WD SOLENOID GROUND
Check the continuity between 4WD control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK 4WD SOLENOID CIRCUIT (1)
Check the resistance between 4WD control unit harness connector.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 5.
5.
CHECK 4WD SOLENOID CIRCUIT (2)
1.
Remove 4WD solenoid harness connector.
2.
Check the continuity between 4WD control unit harness connector and 4WD solenoid harness connector.
4WD control unit
Fuse block (J/B)
Continuity
Connector
Terminal
Connector
Terminal
B5
9
M2
15B
Existed
4WD control unit
—
Continuity
Connector
Terminal
B5
9
Ground
Not existed
4WD control unit
—
Continuity
Connector
Terminal
B5
10
Ground
Existed
11
4WD control unit
Resistance (Approx.)
Connector
Terminal
B5
1
2
2.5
Ω
4WD control unit
4WD solenoid
Continuity
Connector
Terminal
Connector
Terminal
B5
1
C1
2
Existed
2
1
DLN-42
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TY21C]
C1204 4WD SOLENOID
3.
Check the continuity between 4WD control unit harness connector and the ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
CHECK 4WD SOLENOID
Check 4WD solenoid. Refer to
.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> 4WD solenoid is malfunctioning. Replace electric controlled coupling. Refer to
.
7.
CHECK TERMINALS AND HARNESS CONNECTORS
• Check 4WD control unit pin terminals for damage or loose connection with harness connector.
• Check 4WD solenoid pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
>> Replace 4WD control unit. Refer to
DLN-72, "Removal and Installation"
NO
>> Repair or replace error-detected parts.
Component Inspection
INFOID:0000000010755259
1.
CHECK 4WD SOLENOID
1.
Turn the ignition switch OFF.
2.
Disconnect 4WD solenoid harness connector.
3.
Check the resistance between 4WD solenoid harness connector terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> 4WD solenoid is malfunctioning. Replace electric controlled coupling. Refer to
4WD control unit
—
Continuity
Connector
Terminal
B5
1
Ground
Not existed
2
4WD solenoid
Resistance (Approx.)
Terminal
1
2
2.5
Ω
C1209 MODE SW
DLN-43
< DTC/CIRCUIT DIAGNOSIS >
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C1209 MODE SW
DTC Description
INFOID:0000000010755260
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Malfunction of 4WD mode switch
• Malfunction of 4WD mode switch circuit
• Internal malfunction of 4WD control unit
FAIL-SAFE
4WD control changes to front-wheel drive immediately, then 4WD control stops, and the vehicle becomes
front-wheel drive.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
DTC REPRODUCTION PROCEDURE
With CONSULT
1.
Start the engine.
CAUTION:
Stop the vehicle.
2.
Operate 4WD mode switch to each position.
3.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “C1209” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO-1
>> To check malfunction symptom before repair: Refer to
GI-41, "Intermittent Incident"
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010755261
1.
CHECK 4WD MODE SWITCH
Check 4WD mode switch. Refer to
DLN-45, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace 4WD mode switch. Refer to
DLN-73, "Removal and Installation"
.
2.
CHECK 4WD MODE SWITCH SIGNAL CIRCUIT
1.
Disconnect 4WD control unit harness connector.
2.
Check the continuity between 4WD control unit harness connector and 4WD mode switch harness con-
nector.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
C1209
MODE SW
(Mode switch)
More than two switch inputs are simultaneously detected
due to short circuit of 4WD mode switch.
DLN-44
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TY21C]
C1209 MODE SW
3.
Check the continuity between 4WD control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
3.
CHECK 4WD CONTROL SWITCH GROUND CIRCUIT
Check the continuity between 4WD mode switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
CHECK 4WD CONTROL UNIT OUTPUT SIGNAL
1.
Connect 4WD control unit harness connector.
2.
Turn the ignition switch ON.
CAUTION:
Never start the engine.
3.
Check the voltage between 4WD mode switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace damaged parts.
5.
CHECK TERMINALS AND HARNESS CONNECTORS
4WD control unit
4WD mode switch
Continuity
Connector
Terminal
Connector
Terminal
B5
5
M8
3
Not existed
6
Existed
8
Not existed
12
3
Existed
6
Not existed
8
Not existed
14
3
Not existed
6
Not existed
8
Existed
4WD control unit
—
Continuity
Connector
Terminal
B5
5
Ground
Not existed
12
14
4WD mode switch
—
Continuity
Connector
Terminal
M8
2
Ground
Existed
4WD mode switch
—
Voltage
Connector
Terminal
M8
3
Ground
Battery voltage
6
8
C1209 MODE SW
DLN-45
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• Check 4WD control unit pin terminals for damage or loose connection with harness connector.
• Check 4WD mode switch pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
>> Replace 4WD control unit. Refer to
DLN-72, "Removal and Installation"
NO
>> Repair or replace damaged parts.
Component Inspection
INFOID:0000000010755262
1.
CHECK 4WD MODE SWITCH
1.
Turn the ignition switch OFF.
2.
Remove 4WD mode switch.
3.
Check the continuity between 4WD mode switch connector terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace 4WD mode switch. Refer to
DLN-73, "Removal and Installation"
.
4WD mode switch
Condition
Continuity
Terminal
3
2
4WD mode switch: 2WD
Existed
4WD mode switch: AUTO
Not existed
4WD mode switch: LOCK
(State of hold of LOCK position)
6
2
4WD mode switch: 2WD
Not existed
4WD mode switch: AUTO
Existed
4WD mode switch: LOCK
(State of hold of LOCK position)
8
2
4WD mode switch: 2WD
Not existed
4WD mode switch: AUTO
4WD mode switch: LOCK
(State of hold of LOCK position)
Existed
DLN-46
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TY21C]
C1210 ECM
C1210 ECM
DTC Description
INFOID:0000000010755263
DTC DETECTION LOGIC
POSSIBLE CAUSE
Malfunction of engine control system
FAIL-SAFE
4WD control changes to front-wheel drive gradually (rear-wheels still have some driving torque), then 4WD
control stops, and the vehicle becomes front-wheel drive.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
DTC REPRODUCTION PROCEDURE
With CONSULT
1.
Drive the vehicle for a while.
2.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “C1210” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO-1
>> To check malfunction symptom before repair: Refer to
GI-41, "Intermittent Incident"
.
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010755264
1.
PERFORM ECM SELF-DIAGNOSIS
With CONSULT
Perform self-diagnosis for “ENGINE”.
Is any DTC detected?
YES
>> Check the DTC. Refer to
(MR20DD).
NO
>> GO TO 2.
2.
CHECK TERMINALS AND HARNESS CONNECTORS
Check 4WD control unit pin terminals for damage or loose connection with harness connector.
Is inspection result normal?
YES
>> After turning the ignition switch OFF, perform DTC confirmation procedure again. If DTC “C1210”
is detected, Replace 4WD control unit. Refer to
DLN-72, "Removal and Installation"
NO
>> Repair or replace error-detected parts.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
C1210
ENGINE SIGNAL 1
(Engine signal 1)
Malfunction related to engine signal has been detected.
P1804 4WD CONTROL UNIT
DLN-47
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TY21C]
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P1804 4WD CONTROL UNIT
DTC Description
INFOID:0000000010755265
DTC DETECTION LOGIC
POSSIBLE CAUSE
Internal malfunction of 4WD control unit.
FAIL-SAFE
4WD control changes to front-wheel drive immediately, then 4WD control stops, and the vehicle becomes
front-wheel drive.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
DTC REPRODUCTION PROCEDURE
With CONSULT
1.
Turn the ignition switch ON.
2.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “P1804” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO-1
>> To check malfunction symptom before repair: Refer to
GI-41, "Intermittent Incident"
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010755266
1.
REPLACE 4WD CONTROL UNIT
CAUTION:
Replace 4WD control unit when DTC “P1804” is detected simultaneously with other items.
>> Replace 4WD control unit. Refer
DLN-72, "Removal and Installation"
.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P1804
CONTROL UNIT
(Control unit)
Malfunction is detected in the memory (EEPROM) system of
4WD control unit.
DLN-48
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TY21C]
P1808 WHEEL SPEED SENSOR
P1808 WHEEL SPEED SENSOR
DTC Description
INFOID:0000000010755267
DTC DETECTION LOGIC
POSSIBLE CAUSE
• ABS malfunction
• Internal malfunction of 4WD control unit
FAIL-SAFE
4WD control changes to front-wheel drive gradually (rear-wheels still have some driving torque), then 4WD
control stops, and the vehicle becomes front-wheel drive.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
DTC REPRODUCTION PROCEDURE
With CONSULT
1.
Turn the ignition switch ON.
2.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “P1808” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO-1
>> To check malfunction symptom before repair: Refer to
GI-41, "Intermittent Incident"
.
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010755268
1.
PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
With CONSULT
Perform self-diagnosis for “ABS”.
Is any DTC detected?
YES
>> Check the DTC. Refer to
.
NO
>> GO TO 2.
2.
CHECK TERMINALS AND HARNESS CONNECTORS
Check 4WD control unit pin terminals for damage or loose connection with harness connector.
Is inspection result normal?
YES
>> After turning the ignition switch OFF, perform DTC confirmation procedure again. If DTC “P1808”
is detected, Replace 4WD control unit. Refer to
DLN-72, "Removal and Installation"
NO
>> Repair or replace error-detected parts.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P1808
VHCL SPEED SEN-ABS
(Vehicle speed sensor-ABS)
• Malfunction is detected in vehicle speed signal that is out-
put from ABS actuator and electric unit (control unit)
through CAN communication.
• Improper signal is input while driving.
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