Nissan Sentra Service Manual: C1607, C1608 EPS Control unit
DTC Logic
DTC DETECTION LOGIC
| Dtc | Display item | Malfunction detected condition | Possible cause |
| C1607 | EEPROM | When the memory (EEPROM) system malfunction is detected in EPS control unit. | Eps control unit |
| C1608 | CONTROL UNIT | When the internal malfunction is detected in EPS control unit. |
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
-
Turn the ignition switch OFF to ON.
-
Perform eps self-diagnosis.
Is dtc c1607 or c1608 detected? Yes >> proceed to diagnosis procedure. Refer to stc-28, "diagnosis procedure".
No >> inspection end.
Diagnosis Procedure
1.CHECK TERMINALS AND HARNESS CONNECTORS
Check eps control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace the malfunctioning parts.
Is the inspection result normal? Yes >> go to 2.
No >> repair or replace the malfunctioning parts.
2.Perform self-diagnosis
With consult
-
Erase self-diagnostic results for EPS.
-
Turn the ignition switch OFF, and then wait 10 seconds and more.
-
Perform self-diagnosis for EPS.
Is DTC C1607 or C1608 detected? YES >> Replace EPS control unit. Refer to STC-39, "Removal and Installation".
NO >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".
C1606 EPS Motor
DTC Logic
DTC DETECTION LOGIC
Dtc
Display item
Malfunction detected condition
Possible cause
C1606
EPS MOTOR
When the motor driver malfunction of EPS control
unit o ...
C1609 Vehicle speed signal
DTC Logic
Dtc detection logic
DTC
Display item
Malfunction detected condition
Possible cause
C1609
CAN VHCL SPEED
Malfunction is detected in vehicle speed sig ...
Other materials:
C1109 Power and ground system
DTC Logic
DTC DETECTION LOGIC
DTC
Display Item
Malfunction detected condition
Possible causes
C1109
BATTERY VOLTAGE
[ABNORMAL]
When ignition voltage is 10 V or less.
When ignition voltage is 16 V or more.
Harness or connector
...
Inspection and adjustment
Additional service when replacing control unit
Additional service when replacing control unit : description
Memory reset procedure
Please observe the following instructions at confirming the moonroof
operation.
Note:
Do not disconnect the electronic power while the moonroof is operating ...
System description
Component parts
Component parts location
Instrument lower finisher
Sport mode switch
The sport mode switch is installed to the instrument lower finisher.
When the sport mode indicator lamp on the combination meter
is off and the sport mode switch is pressed, the sport mode
is ...
