DTC P0134:00 [MZR-CD 2.2]

id0102f3702500

DTC P0134:00

A/F sensor no activity detected
DETECTION CONDITION
•  The PCM monitors the input voltage from A/F sensor when the following conditions are met. If the input voltage from the sensor never exceeds 0.1 V for specified period, the PCM determines that sensor circuit is not activated.
MONITORING CONDITIONS
―  Following conditions are met
•  Engine is running.
•  Battery voltage is 11—16 V.
•  A/F sensor negative terminal (PCM terminal 2AE) voltage is less than 1.8 V
•  A/F sensor positive terminal (PCM terminal 2AF) voltage is more than 4.7 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 (mode2) and snapshot data are available.
•  The DTC is stored in the PCM memory.
POSSIBLE CAUSE
•  Short to ground in wiring harness between A/F sensor terminal A and PCM terminal 2AF
•  Open circuit or short to ground in wiring harness between A/F sensor terminal A and PCM terminal 2AF
•  A/F sensor malfunction
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE2)
•  Is DTC P0134:00 on FREEZE FRAME DATA (mode2)?
Yes
Go to the next step.
No
Go to troubleshooting procedures for DTC on FREEZE FRAME DATA (mode2).
(See DTC TABLE [MZR-CD 2.2].)
2
VERIFY FREEZE FRAME DATA (MODE2) OR SNAPSHOT DATA HAVE 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.
3
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform 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.
4
VERIFY RELATED PENDING AND STORED DTC
Note
•  If fuel monitor, DTC P0132:00 is retrieved, ignore it until P0134:00 is fixed.
•  Switch the ignition to off, then to the ON position (Engine off).
•  Verify pending and stored DTCs using the M-MDS.
•  Are other DTCs present?
Yes
Go to the appropriate DTC troubleshooting procedures.
No
Go to the next step.
5
INSPECT A/F SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND
•  Switch the ignition off.
•  Disconnect the A/F sensor connector.
•  Inspect for continuity between the A/F sensor terminal A (wiring harness-side) to body ground.
•  Is there continuity?
Yes
If the short to ground circuit could be detected:
•  Repair or replace the wiring harness for a possible short to ground.
If the short to ground circuit could not be detected:
•  Replace the PCM (short to ground in the PCM internal circuit).
Go to Step 8.
No
Go to the next step.
6
INSPECT A/F SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT
•  A/F sensor connector is disconnected.
•  Disconnect the PCM connector.
•  Inspect for continuity between the A/F sensor terminal A (wiring harness-side) to the PCM terminal 2AF (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 Step 8.
7
INSPECT A/F SENSOR
•  Inspect A/F sensor.
•  Is there any malfunction?
Yes
Replace the A/F sensor, then go to the next step.
(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [MZR-CD 2.2].)
No
Go to the next step
8
VERIFY TROUBLESHOOTING OF DTC P0134:00 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Perform the Repair Verification Drive Mode.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
9
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 2.2].)
No
DTC troubleshooting completed.