DTC P06A6:00 [MZR-CD 2.2]SM2444403
DTC P06A6:00 [MZR-CD 2.2]

id0102f3322400

DTC P06A6:00

Sensor reference voltage range/performance
DETECTION CONDITION
• The SCR control unit monitors input voltage from urea pump pressure sensor while the engine switch is ON. Difference in ratio between urea pump pressure sensor output voltage and battery voltage is specified value or less, or specified value or for a continuous 5 s the SCR control unit determines the urea pressure sensor power supply circuit has problem.
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 pressure sensor short cord connector or terminal malfunction
• Short to ground in wiring harness between SCR control unit terminal 26 and urea pump pressure sensor terminal 1
• SCR control unit connector or terminal malfunction
• Short to power in wiring harness between SCR control unit terminal 26 and urea pump pressure sensor terminal 1
• Urea pump pressure sensor power supply and ground circuit short to each other
• Urea pressure sensor connector or terminal 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
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE2)
• Is DTC P06A6:00 on FREEZE FRAME DATA (mode2)?
Yes
Go to the next step.
No
Go to troubleshooting for DTC on FREEZE FRAME DATA (mode2).
(See DTC TABLE [MZR-CD 2.2].)
4
INSPECT UREA PUMP PRESSURE SENSOR SHORT CORD CONNECTOR FOR POOR CONNECTION
• Switch the ignition off.
• Disconnect the urea pump pressure 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 14.
No
Go to the next step.
5
INSPECT UREA PUMP PRESSURE SENSOR POWER SUPPLY CIRCUIT FOR SHORT TO GROUND
• Urea pump pressure sensor short cord connector is disconnected.
• Switch the ignition off.
• Inspect for continuity between urea pump pressure sensor short cord terminal C (SCR control unit-side) and body ground.
• Is there continuity?
Yes
If the short to ground circuit could be detected:
• Repair or replace for a possible short to ground.
If the short to ground circuit could not be detected:
• Replace the SCR control unit (short to ground in SCR control unit internal circuit). (See SCR CONTROL UNIT REMOVAL/INSTALLATION [MZR-CD 2.2].)
Then go to Step 14.
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 14.
No
Go to the next step.
7
INSPECT UREA PUMP PRESSURE SENSOR POWER SUPPLY AND GROUND CIRCUITS FOR SHORT TO EACH OTHER
• Urea pump pressure sensor short cord and SCR control unit connectors are disconnected.
• Inspect for continuity between urea pump pressure sensor short cord terminals C and E (SCR control unit-side).
• Is there continuity?
Yes
Repair or replace the malfunctioning wiring harness, then go to Step 14.
No
Go to the next step.
8
INSPECT UREA PUMP PRESSURE SENSOR POWER SUPPLY CIRCUIT FOR SHORT TO POWER
• Urea pump pressure sensor short cord and SCR control unit connectors are disconnected.
• Switch the ignition ON (Engine off).
• Measure the voltage between urea pump pressure sensor short cord terminal C (SCR control unit-side) and body ground.
• Is there any voltage?
Yes
Repair or replace the wiring harness for a short to power, then go to Step 14.
No
Go to the next step.
9
INSPECT UREA PUMP PRESSURE SENSOR CONNECTOR FOR POOR CONNECTION
• Switch the ignition off.
• Disconnect the urea pump pressure sensor 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 14.
No
Go to the next step.
10
INSPECT UREA PUMP PRESSURE SENSOR CIRCUIT FOR SHORT TO GROUND
• Urea pump pressure sensor and short cord connectors are disconnected.
• Switch the ignition off.
• Inspect for continuity between urea pump pressure sensor short cord terminal C (urea pump pressure sensor-side) and body ground.
• Is there continuity?
Yes
Repair or replace the wiring harness for possible short to ground circuit, then go to Step 14.
No
Go to the next step.
11
INSPECT UREA PUMP PRESSURE SENSOR SIGNAL AND GROUND CIRCUITS FOR SHORT TO EACH OTHER
• Urea pump pressure sensor and short cord connectors are disconnected.
• Inspect for continuity between urea pump pressure sensor short cord terminals D and E (urea pump pressure sensor-side).
• Is there continuity?
Yes
Repair or replace the malfunctioning wiring harness, then go to Step 14.
No
Go to the next step.
12
INSPECT UREA PUMP PRESSURE SENSOR POWER CIRCUIT FOR SHORT TO POWER
• Urea pump pressure sensor and short cord connectors are disconnected.
• Switch the ignition ON (Engine off).
• Measure the voltage between urea pump pressure sensor short cord terminal C (urea pump pressure sensor-side) and body ground.
• Is there any voltage?
Yes
Repair or replace the wiring harness for a short to power, then go to Step 14.
No
Go to the next step.
13
INSPECT UREA PUMP PRESSURE SENSOR
• Inspect the urea pump pressure sensor. (See SCR SYSTEM INSPECTION [MZR-CD 2.2].)
• Is there any malfunction?
Yes
Replace the urea pump, then go to the next step.
(See UREA PUMP REMOVAL/INSTALLATION [MZR-CD 2.2].)
No
Go to the next step.
14
VERIFY TROUBLESHOOTING OF DTC P06A6:00 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 5 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.
(See SCR CONTROL UNIT REMOVAL/INSTALLATION [MZR-CD 2.2].)
No
Go to the next step.
15
VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZR-CD 2.2].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR-CD 2.2].)
No
DTC troubleshooting completed.