DTC P0030:00 [MZR-CD (RF Turbo)]

id0102f1700300

DTC P0030:00

A/F sensor heater control circuit problem
DETECTION CONDITION
•  OBD system monitors the output signal voltage from A/F sensor which is in proportion to the element impedance of A/F sensor. If the output signal voltage is not between 0.41 V and 4.38 V after specified time from engine start, heater performance is considered failed.
Monitoring condition
•  Battery voltage:11—16 V
Diagnostic support note
•  The MIL illuminates if the PCM detects the above malfunction condition in first drive cycle.
•  PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
•  FREEZE FRAME DATA is available.
•  The DTC is stored in the PCM memory.
POSSIBLE CAUSE
•  A/F sensor heater malfunction
•  Connector or terminal malfunction
•  Open circuit in wiring harness between A/F sensor heater terminal D and PCM terminal 34
•  Short to ground in the wiring harness between A/F sensor heater terminal D and PCM terminal 34
•  Short to power supply in the wiring harness between A/F sensor heater terminal D and PCM terminal 34
•  Open circuit in the wiring harness between A/F sensor heater terminal C and main relay
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED
•  Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME 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
•  Is DTC P0030:00 on FREEZE FRAME DATA?.
Yes
Go to the next step.
No
Go to troubleshooting for DTC on FREEZE FRAME DATA.
(See DTC TABLE [MZR-CD (RF Turbo)].)
4
INSPECT A/F SENSOR CONNECTOR FOR POOR CONNECTION
•  Switch the ignition to off.
•  Disconnect the A/F sensor connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, and corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 8.
No
Go to the next step.
5
INSPECT A/F SENSOR HEATER
•  Inspect the A/F sensor heater.
•  Is there any malfunction?
Yes
Replace the A/F sensor, then go to Step 10.
(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No
Go to the next step.
6
INSPECT A/F SENSOR HEATER POWER CIRCUIT FOR OPEN CIRCUIT
•  Switch the ignition to ON (Engine off).
•  Measure the voltage between A/F sensor terminal C (wiring harness-side) and body ground.
•  Is the voltage B+?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit or short to ground, then go to Step 10.
7
INSPECT PCM CONNECTOR FOR POOR CONNECTION
•  Switch the ignition to off.
•  Disconnect the PCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, and corrosion).
•  Is there any malfunction detected?
Yes
Repair or replace the terminal, then go to the next step.
No
Go to the next step.
8
INSPECT A/F SENSOR HEATER CONTROL CIRCUIT FOR SHORT TO GROUND
•  Switch the ignition to off.
•  Inspect for continuity between A/F sensor terminal D (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to Step 10.
No
Go to the next step.
9
INSPECT A/F SENSOR HEATER CONTROL CIRCUIT FOR OPEN CIRCUIT
•  Switch the ignition to off.
•  Inspect for continuity between A/F sensor terminal D (wiring harness-side) and PCM terminal 34 (wiring harness-side)
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to the next step.
10
VERIFY TROUBLESHOOTING OF DTC P0030:00 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Switch the ignition to ON.
•  Is the PENDING CODE for this DTC present?
Yes
Replace the PCM, then go to the next step
(See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No
Go to the next step.
11
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR-CD (RF Turbo)].)
No
DTC troubleshooting completed.