Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC PRIORITY
1. Turn ignition switch ON.
2. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
3. Check for DTC U1612-00 being current or more than 1 past count on the CONSULT screen.
Is DTC U1612-00 detected?

YES

GO TO 2 .

NO

Refer to Intermittent Incident .
CHECK DTC PRIORITY
1. Turn ignition switch ON.
2. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
3. Check for DTC U010E-00 being current or more than 1 past count on the CONSULT screen.
Is DTC U010E-00 detected?

YES

GO TO 9 .

NO

GO TO 3 .
CHECK DTC PRIORITY
1. Turn ignition switch ON.
2. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
3. Are any of the following displayed as current or more than 1 past count on the CONSULT screen:
  - P0106-00
  - P029D-00
  - P029E-00
  - P02A2-00
  - P1611-00
Is applicable DTC detected?

YES

GO TO 8 .

NO

GO TO 4 .
INSPECT SCR TEMPERATURE SENSOR MODULE AND HARNESS CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect SCR temperature sensor module harness connector C30.
3. Inspect the SCR temperature sensor module connector pins for the following:
  - Loose connector
  - Corroded pins
  - Bent or broken pins
  - Pushed back or expanded pins
  - Moisture in or on the connector
  - Missing or damaged connector seals
  - Dirt or debris on or in the connector pins
  - Connector shell broken
  - Wire insulation damage
  - Damaged connector locking tab
Is the inspection result normal?

YES

GO TO 5 .

NO

Repair or replace error-detected parts.

CHECK THE SCR TEMPERATURE SENSOR MODULE SUPPLY VOLTAGE AND RETURN CIRCUIT

Turn ignition switch OFF.
Disconnect the SCR temperature sensor module harness connector C30.
Turn ignition switch ON.

Measure the voltage between SCR temperature sensor module harness connector C30 terminals 3 and 4.

SCR temperature sensor module

Voltage

(Approx.)

Connector

Terminal

C30

> 10.8V

Is inspection result normal?

YES

GO TO 7.

GO TO 6.

CHECK THE DPF TEMPERATURE SENSOR MODULE VOLTAGE

Turn ignition switch OFF.
Disconnect the SCR temperature sensor module harness connector C30.
Turn ignition switch ON.

Measure the voltage between DPF temperature sensor module harness connector C30 terminal 3 and ground.

SCR temperature sensor module

Ground

Voltage

(Approx.)

Connector

Terminal

C30

> 10.8V

Is inspection result normal?

YES

Repair or replace harness for an open ground circuit.

Repair or replace harness for an open battery voltage supply circuit.

CHECK FOR TERMINATING RESISTANCE

Turn ignition switch OFF.
Disconnect the SCR temperature sensor module harness connector C30.
Disconnect the data link adapter from the service data link harness connector.

Measure the resistance between SCR temperature sensor module harness connector C30 terminals 1 and 2.

SCR temperature sensor module			Resistance
Connector	Terminal
C30	1	2	54 - 66 Ω

Is the inspection result normal?

YES

Replace DPF temperature sensor module. Refer to Removal and Installation .

GO TO 9.

CHECK FOR IPDM E/R and FUSES
1. Turn ignition switch OFF.
2. Check the IPDM E/R and fuses:
  - Check for a blown after treatment sensor power supply fuse.
  - Inspect the SCR temperature sensor power supply fuse for cracks, burns, corrosion, or discoloration.
  - Inspect the IPDM E/R for loose or expanded pins.
  - Inspect the IPDM E/R for corrosion.
Is the inspection result normal?

YES

GO TO 9.

NO

Repair or replace error-detected parts.

CHECK FOR TERMINATING RESISTANCE

Turn ignition switch OFF.
Disconnect the data link adapter from the service data link harness connector.

Measure the resistance between Cummins data link connector F190 terminals 1 and 2.

Cummins data link connector			Resistance
Connector	Terminal
F190	1	2	54 - 66 Ω

Is the inspection result normal?

YES

GO TO 11.

GO TO 10.

CHECK FOR TERMINATING RESISTANCE

Turn ignition switch OFF.
Disconnect the data link adapter from the service data link harness connector.
Disconnect the ECM harness connector E93.

Measure the resistance between Cummins data link connector F190 terminal 1 and terminal 2.

Cummins data link connector			Resistance
Connector	Terminal
F190	1	2	108 - 132 Ω

Is the inspection result normal?

YES

A malfunction has been detected in the after treatment side of the CAN2 communication line circuit. Refer to Trouble Diagnosis Flow Chart .

A malfunction has been detected in the engine side of the CAN2 communication line circuit. Refer to Trouble Diagnosis Flow Chart .

CHECK CAN2 COMMUNICATION LINE (+) FOR SHORT

Turn ignition switch ON.

Check voltage between Cummins data link connector F190 terminal 1 and ground.

Cummins data link connector

Ground

Voltage

(Approx.)

Connector

Terminal

F190

0.1 - 4.5V

Is the inspection result normal?

YES

GO TO 12.

Repair or replace error-detected parts.

CHECK CAN2 COMMUNICATION LINE (-) FOR SHORT

Turn ignition switch ON.

Check voltage between Cummins data link connector F190 terminal 2 and ground.

Cummins data link connector

Ground

Voltage

(Approx.)

Connector

Terminal

F190

0.1 - 4.5V

Is the inspection result normal?

YES

Refer to Intermittent Incident .

Repair or replace harness for a short.