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DTC C1036:12 [EVP CONTROL UNIT]

DTC

C1036:12

Electric vacuum pump relay 2: short to power supply

DETECTION CONDITION

  • EVP control unit terminal E voltage of 2 V or more is detected when the electric vacuum pump is operated.

FAIL-SAFE FUNCTION

POSSIBLE CAUSE

  • Short to power supply circuit in electric vacuum pump relay 2 (built-into EVP control unit) circuit

  • EVP control unit malfunction

SYSTEM WIRING DIAGRAM

—
Diagnostic Procedure

Step

Inspection

Action

1

 RECORD SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS TO UTILIZE WITH REPEATABILITY VERIFICATION

NOTE:

  • Recording can be facilitated using the screen capture function of the PC.

  • Record the snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (fuel system related) on the repair order.

—

Go to the next step.

2

 DETERMINE WHETHER MALFUNCTION IS PAST OR PRESENT

NOTE:

  • When clearing the DTC, the snap shot data is also cleared at the same time. Snap shot data is recorded if it is not recorded in Step 1.

Yes

Replace the EVP control unit, then go to Step 6.

(See EVP CONTROL UNIT REMOVAL/INSTALLATION.)

No

Go to the next step.

3

 VERIFY DTC REPEATABILITY

  • Switch the ignition ON (engine off).

  • Access the following EVP control unit PIDs using the M-MDS:

    • VP_PV

    • VPR2_V

  • Access the simulation item VPS_FBK using the M-MDS.

  • Verify PID VPR2_V and VP_PV when the electric vacuum pump is operated by simulation item VPS_FBK.

  • Is PID VPR2_V on and is VP_MV less than 2 V?

Yes

Go to the next step.

No

Replace the EVP control unit, then go to Step 6.

(See EVP CONTROL UNIT REMOVAL/INSTALLATION.)

4

 DRIVE VEHICLE THEN VERIFY DTC REPEATABILITY BASED ON SERVICE QUESTIONING RESULTS AND SNAP SHOT DATA

  • Switch the ignition ON (engine off).

  • Access the following EVP control unit PIDs using the M-MDS:

    • VP_MV

    • VPR2_V

  • Drive the vehicle based on the service questions content and snap shot data driving conditions.

  • Verify PID VP_MV when the VPR2_V PID is On.

  • Is the VP_MV PID value 2 V or less?

Yes

Go to the next step.

No

Replace the EVP control unit, then go to Step 6.

(See EVP CONTROL UNIT REMOVAL/INSTALLATION.)

5

 VERIFY DTC REPEATABILITY AND DETERMINE IF MALFUNCTION CAUSE IS EVP CONTROL UNIT

Yes

Replace the EVP control unit, then go to the next step.

(See EVP CONTROL UNIT REMOVAL/INSTALLATION.)

No

DTC troubleshooting completed.

Explain to the customer that there are no malfunctions with the vehicle based on the contents of the servicing.

6

 VERIFY NO DTC IS PRESENT

  • Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [EVP CONTROL UNIT].)

No

DTC troubleshooting completed.
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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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