SFI SYSTEM, Diagnostic DTC:P1183 and P1184

DTC Code DTC Name
P1183 Short Circuit to the Ground on the Mastervac Sensor
P1184 Short Circuit to Batt on the Mastervac Sensor

DESCRIPTION

The vacuum sensor assembly detects the brake booster pressure as a change in voltage. The ECM calculates the brake booster pressure based on this voltage.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P1183

Short Circuit to the Ground on the Mastervac Sensor

Short to ground in vacuum sensor assembly circuit.

  • Vacuum sensor assembly (brake booster pressure sensor)

  • Wire harness or connector

  • ECM

Comes on

DTC stored

P1184

Short Circuit to Batt on the Mastervac Sensor

Short to +B in vacuum sensor assembly circuit.

  • Vacuum sensor assembly (brake booster pressure sensor)

  • Wire harness or connector

  • ECM

Comes on

DTC stored

MONITOR DESCRIPTION

These DTCs are stored when a malfunction is detected in the vacuum sensor assembly (brake booster pressure sensor) circuit. If there is an open or short in the vacuum sensor assembly (brake booster pressure sensor) circuit, the ECM will illuminate the MIL and store a DTC.

WIRING DIAGRAM

A330032E05

PROCEDURE

  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1183 AND P1184)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Trouble Codes.

    5. Check for DTCs.

      Powertrain > Engine > Trouble Codes

    Result

    Result

    Proceed to

    DTC P1183 and/or P1184 is output

    A

    DTC P1183 and/or P1184 and other DTCs are output

    B
    Tip:

    If DTC P1183 and/or P1184 and P0562, P0563 or P0658 are output simultaneously, troubleshoot for DTC P0562, P0563 or P0658 first.

    B

    GO TO DTC CHART

    Click here

    A

  2. CHECK HARNESS AND CONNECTOR (VACUUM SENSOR ASSEMBLY - ECM)

    1. Disconnect the vacuum sensor assembly connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A15-1 (E2) - A35-48 (BRE2)

      Always

      Below 1 Ω

      A15-2 (PB) - A35-37 (PB)

      Always

      Below 1 Ω

      A15-3 (VC) - A35-24 (BRCV)

      Always

      Below 1 Ω

      A15-1 (E2) or A35-48 (BRE2) - Body ground and other terminals

      Always

      10 kΩ or higher

      A15-2 (PB) or A35-37 (PB) - Body ground and other terminals

      Always

      10 kΩ or higher

      A15-3 (VC) or A35-24 (BRCV) - Body ground and other terminals

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE VACUUM SENSOR ASSEMBLY

    1. Replace the vacuum sensor assembly.

      for LHD:Click here

      for RHD:Click here

    Result

    Proceed to

    NEXT
    NEXT

  4. CHECK WHETHER DTC OUTPUT RECURS (DTC P1183 OR P1184)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.

      Powertrain > Engine > Clear DTCs

    5. Turn the ignition switch off and wait for a few minutes.

    6. Perform the drive test.

    7. Turn the GTS on.

    8. Enter the following menus: Powertrain / Engine / Trouble Codes.

    9. Check for DTCs.

      Powertrain > Engine > Trouble Codes

      Result

      Result

      Proceed to

      DTC P1183 or P1184 is output

      A

      DTCs are not output

      B
    A

    REPLACE ECM

    Click here

    B

    END