Nissan Pathfinder. Manual — part 1127
C1606 EPS MOTOR
STC-25
< DTC/CIRCUIT DIAGNOSIS >
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C1606 EPS MOTOR
DTC Logic
INFOID:0000000009177142
DTC DETECTION LOGIC
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 “EPS” self-diagnosis.
Is DTC “C1606” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000009177143
1.
PERFORM SELF-DIAGNOSIS
With CONSULT
1. Turn the ignition switch OFF to ON.
2. Erase self-diagnostic results for “EPS”.
3. Turn the ignition switch OFF and wait for at least 10 seconds.
4. Perform self-diagnosis for “EPS”.
Is DTC “C1606” detected?
YES
>> Power steering motor is malfunctioning. Replace power steering oil pump assembly. Refer to
52, "Removal and Installation"
.
NO
>> Check pin terminal and connection of each harness connector for malfunctioning conditions.
DTC
Display item
Malfunction detected condition
Possible cause
C1606
EPS MOTOR
When the motor driver malfunction of power steer-
ing control module or power steering control mod-
ule motor driver malfunction is detected.
• Harness or connector
• Power steering control motor
• Power steering control mod-
ule
STC-26
< DTC/CIRCUIT DIAGNOSIS >
C1607, C1608 POWER STEERING CONTROL MODULE
C1607, C1608 POWER STEERING CONTROL MODULE
DTC Logic
INFOID:0000000009177144
DTC DETECTION LOGIC
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 “EPS” self-diagnosis.
Is DTC “C1607” or “C1608” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000009177145
1.
PERFORM SELF-DIAGNOSIS
With CONSULT
1. Turn the ignition switch OFF to ON.
2. Erase self-diagnostic results for “EPS”.
3. Turn the ignition switch OFF and wait for at least 10 seconds.
4. Perform self-diagnosis for “EPS”.
Is DTC “C1607” or “C1608” detected?
YES
>> Power steering control module is malfunctioning. Replace power steering oil pump assembly.
ST-52, "Removal and Installation"
NO
>> Check pin terminal and connection of each harness connector for malfunctioning conditions.
DTC
Display item
Malfunction detected condition
Possible cause
C1607
EEPROM
When the memory (EEPROM) system malfunction is
detected in power steering control module.
Power steering control module
C1608
CONTROL UNIT
When the internal malfunction is detected in power
steering control module.
C160A HEAT PROTECTION
STC-27
< DTC/CIRCUIT DIAGNOSIS >
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C160A HEAT PROTECTION
DTC Logic
INFOID:0000000009177146
DTC DETECTION LOGIC
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 “EPS” self-diagnosis.
Is DTC “C160A” detected?
YES
>> Go to
NO
>> Inspection End.
DTC
Display item
Malfunction detected condition
Possible cause
C160A
HEAT PROTECTION
When the steering wheel is operated excessively
and the interior temperature of the power steering
system reaches 118
°C (244.4°F) or more. (Protec-
tion function)
NOTE:
Although the hydraulic pump electric power steering
system warning lamp turns ON, this is not a system
malfunction. The state returns to normal after stop-
ping steering operation and waiting until the system
interior temperature drops to 90
°C (194°F) or less.
The protection of the hydraulic
pump electric power steering sys-
tem
STC-28
< DTC/CIRCUIT DIAGNOSIS >
U1000 CAN COMM CIRCUIT
U1000 CAN COMM CIRCUIT
Description
INFOID:0000000009177147
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit communicate data but selectively reads required data only.
DTC Logic
INFOID:0000000009177148
DTC DETECTION LOGIC
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 “EPS” self-diagnosis.
Is DTC “U1000” detected?
YES
>> Go to
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000009177149
LAN-20, "Trouble Diagnosis Flow Chart"
DTC
Display item
Malfunction detected condition
Possible cause
U1000
CAN COMM CIRCUIT
Power steering control module is not transmitting/re-
ceiving CAN communication signal for 2 seconds or
more.
CAN communication error
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