DTC P205D:00 [MZR-CD 2.2]


id0102f3164800

DTC P205D:00

Urea tank temperature sensor circuit high

DETECTION CONDITION
•  The SCR control unit monitors input voltage from the urea tank temperature sensor while the engine switch is on. If the input voltage is above 3.12 V for 2 sec., the SCR control unit determines that the urea temperature sensor circuit voltage is high.
Diagnostic support note
•  The MIL illuminates if the SCR control unit detects the above malfunction condition in first drive cycle.
•  The SCR warning light flashes if the SCR control unit detects the above malfunction condition in first drive cycle.
•  PENDING CODE is available if the SCR control unit detects the above malfunction condition during the first drive cycle.
•  FREEZE FRAME DATA (mode2) and snapshot data are available.
•  The DTC is stored in the SCR control unit memory.
POSSIBLE CAUSE
•  Urea tank temperature sensor short cord connector or terminal malfunction
•  Urea tank temperature sensor malfunction
•  SCR control unit connector or terminal malfunction
•  Open circuit in wiring between urea tank temperature sensor terminal E and SCR control unit terminal 90
•  Open circuit in wiring between urea tank temperature sensor terminal J and SCR control unit terminal 56
•  Short to power supply in wiring between urea tank temperature sensor terminal J and SCR control unit terminal 56
•  Urea tank temperature sensor malfunction
•  SCR control unit malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED
•  Have FREEZE FRAME DATA (mode2) or snapshot data been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA (mode2) and snapshot data on the repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform the repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT?
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine.
•  Is the PENDING CODE for this DTC present?
Yes
Go to the next step.
No
Intermittent concern exists.
Perform the “INTERMITTENT CONCERN TROUBLESHOOTING”.
4
INSPECT UREA TANK TEMPERATURE SENSOR CONNECTOR FOR POOR CONNECTION
•  Switch the ignition off.
•  Disconnect the urea tank temperature sensor short cord connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 9.
No
Go to the next step.
5
CLASSIFY UREA TANK TEMPERATURE SENSOR MALFUNCTION OR WIRING HARNESS MALFUNCTION
•  Urea tank temperature sensor connector is disconnected.
•  Access the SCR control unit PID TANK_TEMP using the M-MDS.
•  Connect a jumper wire between urea tank temperature sensor short cord terminal E and J (wiring harness-side).
•  Verify TANK_TEMP PID value.
•  Is the voltage 3.16 V or below?
Yes
Replace the urea pump, urea tank component then go to Step 9.
No
Go to the next step.
6
INSPECT SCR CONTROL UNIT CONNECTOR FOR POOR CONNECTION
•  Switch the ignition off.
•  Disconnect the SCR control unit connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 9.
No
Go to the next step.
7
INSPECT UREA TANK TEMPERATURE SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER
•  Urea tank temperature sensor short cord and SCR control unit connectors are disconnected.
•  Switch the ignition ON (Engine off).
•  Measure the voltage between the urea tank temperature sensor terminal 5 and body ground.
•  Is there any voltage?
Yes
Repair or replace the wiring harness for a short to power, then go to Step 9.
No
Go to the next step.
8
INSPECT UREA TANK TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT
•  Urea tank temperature sensor short cord and SCR control unit connectors are disconnected.
•  Switch the ignition off.
•  Inspect for continuity between following terminals.
―  Urea tank temperature sensor short cord terminal E (SCR control unit-side) and SCR control unit terminal 90
―  Urea tank temperature sensor short cord terminal J (SCR control unit-side) and SCR control unit terminal 56
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for an open circuit, then go to the next step.
9
VERIFY TROUBLESHOOTING OF DTC P205D:00 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the SCR control unit memory using the M-MDS.
•  Switch the ignition ON for 2 sec.
•  Retrieve the DTC using the M-MDS.
•  Is the PENDING CODE for this DTC present?
Yes
Replace the SCR control unit, then go to the next step.
No
Go to the next step.
10
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.