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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1063 (Transfer Case (ATX14B)) >> Ecu Diagnosis Information >> Transfer Control Unit >> DTC Index >> DTC Chart

DTC Chart

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
DTC CONSULT Diagnostic item is detected when...
[P1802 ] CONTROL UNIT 1 Malfunction is detected in the memory (RAM) system of transfer control unit.
[P1803 ] CONTROL UNIT 2 Malfunction is detected in the memory (ROM) system of transfer control unit.
[P1804 ] CONTROL UNIT 3 Malfunction is detected in the memory (EEPROM) system of transfer control unit.
[P1807 ] VHCL SPEED SEN.AT
  • Malfunction is detected in output shaft revolution signal that is output from TCM through CAN communication.
  • Improper signal is input while driving.
[P1808 ] VHCL SPEED SEN.ABS
  • Malfunction is detected in vehicle speed signal that is output from ABS actuator and electric unit (control unit) through CAN communication.
  • Improper signal is input while driving.
[P1809 ] CONTROL UNIT 4 AD converter system of transfer control unit is malfunctioning.
[P1810 ] 4L POSI SW TF Improper signal from neutral-4LO switch is input due to open or short circuit.
[P1811 ] BATTERY VOLTAGE Power supply voltage for transfer control unit is abnormally low while driving.
[P1813 ] 4WD MODE SW More than two switch inputs are simultaneously detected due to short circuit of 4WD shift switch.
[P1814 ] 4WD DETECT SWITCH Improper signal from wait detection switch is input due to open or short circuit.
[P1816 ] PNP SW/CIRC When transmission range switch signal is malfunction or communication error between the control units.
[P1817 ] SHIFT ACTUATOR
  • Motor does not operate properly due to open or short circuit in actuator motor.
  • Malfunction is detected in the actuator motor. (When 4WD shift switch is operated and actuator motor is not operated)
  • Malfunction is detected in transfer shift high relay and transfer shift low relay.
[P1818 ] SHIFT ACT POSI SW
  • Improper signal from actuator position switch is input due to open or short circuit.
  • Malfunction is detected in the actuator position switch.
[P1819 ] SHIFT ACT CIR
  • Transfer control device actuator circuit is shorted or open. (Malfunctions are detected when transfer shift relay circuit is open/shorted or relay monitor circuit is open/shorted.)
  • Malfunction occurs in transfer control device drive circuit.
  • Malfunction is detected in transfer shut off relay.
[P1820 ] ENGINE SPEED SIG
  • Malfunction is detected in engine speed signal that is output from ECM through CAN communication.
  • Improper signal is input while driving.
[P1822 ] DUTY SOLENOID Proper voltage is not applied to clutch pressure solenoid valve due to open or short circuit.
[P1823 ] 2-4WD SOLENOID Proper voltage is not applied to 2-4WD solenoid valve due to open or short circuit.
[P1824 ] MOTOR RELAY Motor does not operate properly due to open or short circuit in transfer motor or transfer motor relay.
[P1826 ] OIL TEMP SEN Signal voltage from transfer fluid temperature sensor is abnormally high (Transfer fluid temperature is abnormally low) while driving.
[P1827 ] CLUTCH PRES SW
  • Improper signal from clutch pressure switch is input due to open or short circuit.
  • Malfunction occurs in clutch pressure switch or hydraulic circuit.
[P1828 ] LINE PRES SW
  • Improper signal from line pressure switch is input due to open or short circuit.
  • Malfunction occurs in line pressure switch or hydraulic circuit.
[P1829 ] THROTTLE POSI SEN
  • Malfunction is detected in accelerator pedal position signal that is output from ECM through CAN communication.
  • Signal voltage from accelerator pedal position sensor is abnormally high or low.
[P1830 ] ABS OP SIG Malfunction is detected in ABS operation signal that is output from ABS actuator and electric unit (control unit) through CAN communication.
[P1831 ] VDC OP SIG Malfunction is detected in VDC operation signal that is output from ABS actuator and electric unit (control unit) through CAN communication.
[P1832 ] TCS OP SIG Malfunction is detected in TCS operation signal that is output from ABS actuator and electric unit (control unit) through CAN communication.
[U1010 ] CONTROL UNIT (CAN) Detecting error during the initial diagnosis of CAN controller of transfer control unit.
CAUTION:
  • If CAN COMM CIRCUIT [U1000] or CONTROL UNIT (CAN) [U1010] are displayed with other DTCs, first perform the trouble diagnosis for CAN communication line.
  • If ABS OP SIG [P1830], VDC OP SIG [P1831] or TCS OP SIG [P1832] is displayed, first perform the trouble diagnosis for ABS system.
  • If VHCL SPEED SEN.AT [P1807] is displayed, first perform the trouble diagnosis for A/T system.
NOTE:
  • If SHIFT ACT POSI SW [P1818] or SHIFT ACT CIR [P1819] is displayed, first erase self-diagnostic results. (SHIFT ACT POSI SW [P1818] or SHIFT ACT CIR [P1819] may be displayed after installing transfer control unit or transfer assembly.)
  • If CL PRES SW [P1827] or LINE PRES SW [P1828] is displayed only while driving in reverse, check the continuity of R position on transmission range switch. When there is no malfunction found in the electrical system, check the hydraulic system.
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