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DTC P2004

DETECTION CONDITION AND POSSIBLE CAUSE (DTC P2004 - LF, L3)

DTC P2004 Variable tumble shutter valve stuck open
DETECTION CONDITION 
  • The PCM monitors mass the variable tumble shutter valve position using the variable tumble position sensor. If PCM turns the variable tumble solenoid valve on but the variable tumble position still remain open (the variable tumble position sensor off), PCM determines that the variable tumble shutter valve has been stuck open.

    • Diagnostic support note 

  • This is a continuous monitor (CCM).
  • The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
  • 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 
  • VTC shutter valve actuator malfunction (stuck open)
  • Mis-connecting or pull out the vacuum hose
  • Variable tumble solenoid valve malfunction
  • Variable tumble shutter valve switch malfunction
  • Open circuit in wiring harness between the variable tumble shutter valve switch terminal C and the PCM terminal 2AE
  • Short to power in wiring harness between the variable tumble shutter valve switch terminal C and the PCM terminal 2AE
  • Open circuit in wiring harness between the variable tumble solenoid valve terminal B and the PCM terminal 2I(1)(3), 2AI(2)
  • Short to power in wiring harness between the variable tumble solenoid valve terminal B and the PCM terminal 2I(1)(3), 2AI(2)
  • PCM malfunction
G04313416Courtesy of MAZDA MOTORS CORP.
(1) California emission regulation applicable model
(2) Except for California emission regulation applicable model with LF ATX
(3) Except for California emission regulation applicable model with LF MTX, L3
DIAGNOSTIC PROCEDURE CHART

STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA HAS BEEN RECORDED 
  • Has FREEZE FRAME DATA been recorded?
 Yes Go to next step.
No Record FREEZE FRAME DATA on repair order, then go to next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Check for related Service Bulletins and/or on-line repair information availability.
  • Is any related repair information available?
 Yes Perform repair or diagnosis according to available repair information.
  • If vehicle is not repaired, go to next step.
No Go to next step.
3 CLASSIFY INTERMITTENT CONCERN OR CONTINUOUS CONCERN 
  • Clear the DTC from the PCM memory using the WDS or equivalent.
  • Drive the vehicle under the following conditions:
    • Engine coolant temperature is above 63 °C {145 °F}. 
    • Engine speed: below 3, 750 RPM 
    • Throttle opening angle is below as followings
      • Engine speed below 1, 500 RPM: above 35% 
      • Engine speed between 1, 500-2, 500 RPM: between 25-35% 
      • Engine speed above 2, 500: below 25% 
  • Is the PENDING CODE for this DTC present?
 Yes Go to next step.
No Intermittent concern exists. Go to INTERMITTENT CONCERN TROUBLESHOOTING procedure.
(See INTERMITTENT CONCERN TROUBLESHOOTING ).
4 VERIFY STORED OTHER DTCS 
  • Verify stored DTCs using WDS or equivalent.
  • Is DTC P2088 or P2089 present?
 Yes Go to the applicable DTC inspection.
(See DTC TABLE ).
No Go to next step.
5 INSPECT VARIABLE TUMBLE SHUTTER VALVE SWITCH CONNECTOR AND VARIABLE TUMBLE SOLENOID VALVE CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • 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 15.
No Go to the next step.
6 INSPECT VARIABLE TUMBLE SHUTTER VALVE SWITCH SIGNAL CIRCUIT FOR OPEN CIRCUIT 
  • Disconnect the variable tumble shutter valve switch connector.
  • Inspect for continuity between the variable tumble shutter valve switch terminal C (wiring harness side) and the PCM terminal 2AE (wiring harness side).
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace the wiring harness for open circuit, then go to Step 15.
7 INSPECT VARIABLE TUMBLE SHUTTER VALVE SWITCH SIGNAL CIRCUIT FOR SHORT TO POWER 
  • Connect the variable tumble shutter valve switch connector.
  • Turn the ignition switch to the ON position (Engine off).
  • Measure the voltage between PCM terminal 2AE (wiring harness side) and body ground.
  • Is the voltage B+  ?
 Yes Repair or replace the wiring harness for open circuit, then go to Step 15.
No Go to the next step.
8 INSPECT PCM CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect the PCM connector.
  • Inspect for poor connection at PCM terminals (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair the terminal, then go to Step 15.
No Go to the next step.
9 INSPECT VARIABLE TUMBLE SOLENOID VALVE  Yes Go to next step.
No Replace the variable tumble solenoid valve, then go to Step 15.
10 INSPECT VARIABLE TUMBLE SHUTTER VALVE ACTUATOR  Yes Go to next step.
No Replace the Intake manifold, then go to Step 15.
11 INSPECT VARIABLE TUMBLE SHUTTER VALVE SWITCH  Yes Go to the next step.
No Repair or replace the wiring harness for open circuit, then go to Step 15.
12 INSPECT VARIABLE TUMBLE SOLENOID VALVE CONTROL CIRCUIT FOR SHORT TO POWER 
  • Connect variable tumble solenoid valve connector.
  • Turn the ignition switch to the ON position (Engine off).
  • Measure the voltage between PCM terminal 2AI (wiring harness side) and body ground.
  • Is the voltage B+  ?
 Yes Repair or replace the wiring harness for open circuit, then go to Step 15.
No Go to the next step.
13 INSPECT VARIABLE TUMBLE SOLENOID VALVE CONTROL CIRCUIT FOR OPEN CIRCUIT 
  • Inspect for continuity between variable tumble solenoid valve terminal B (wiring harness-side) and PCM terminal 2I(1)(3), 2AI(2) (wiring harness side).
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace the wiring harness for open circuit, then go to Step 15.
14 VERIFY CONNECTION OF VACUUM HOSE ROUTING  Yes Go to next step.
No Connect the vacuum hoses properly, then go to next step.
15 VERIFY TROUBLESHOOTING OF DTC P2004 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Start the engine.
  • Clear the DTC from the PCM memory using the WDS or equivalent.
  • Start the engine.
  • Drive the vehicle under following conditions:
    • Engine coolant temperature is above 63 °C {145 °F}. 
    • Engine speed: below 3, 750 RPM 
    • Throttle opening angle is below as followings
      • Engine speed below 1, 500 RPM: above 35% 
      • Engine speed between 1, 500-2, 500 RPM: between 25-35% 
      • Engine speed above 2, 500: below 25% 
  • Is the PENDING CODE for this DTC present?
 Yes Replace the PCM, then go to next step.
(See PCM REMOVAL/INSTALLATION ).
No Go to next step.
16 VERIFY AFTER REPAIR PROCEDURE  Yes Go to the applicable DTC inspection.
(See DTC TABLE ).
No Troubleshooting completed.
(1) California emission regulation applicable model
(2) Except for California emission regulation applicable model with LF ATX
(3) Except for California emission regulation applicable model with LF MTX, L3
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