DTC

C1035:13

Electric vacuum pump relay 1: stuck OFF

DETECTION CONDITION

• EVP control unit terminal C voltage deviates from the 90% to 110% battery voltage range for a continuous 0.2 s when electric vacuum pump relay 1 is turned on.

FAIL-SAFE FUNCTION

• Refer to “Fail-safe function table”. (See DTC TABLE [EVP CONTROL UNIT].)

POSSIBLE CAUSE

• Electric vacuum pump relay 1 (built-into EVP control unit) stuck OFF

• Electric vacuum pump relay 1 drive monitor circuit malfunction

• EVP control unit malfunction

SYSTEM WIRING DIAGRAM

—

Step

Inspection

Action

1

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

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.

• Using the M-MDS, clear the DTC from the EVP control unit.

  (See CLEARING DTC [EVP CONTROL UNIT].)

• Switch the ignition ON (engine off).

• Using the M-MDS, perform the EVP control unit ODDTC self test.

  (See DTC INSPECTION [EVP CONTROL UNIT].)

• Is the same DTC present?

Yes

Replace the EVP control unit, then go to Step 7.

(See EVP CONTROL UNIT REMOVAL/INSTALLATION.)

No

Go to the next step.

3

• Switch the ignition ON (engine off).

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

• VP_PV

• VPR1_V

• VPWR

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

• Compare the values of VP_PV and VPWR with the PID VPR1_V verified when the electric vacuum pump was operated by simulation item VPS_FBK.

• Is VP_PV within the 90% to 110% VPWR range with PID VPR1_V turned on?

Yes

Go to the next step.

No

Replace the EVP control unit, then go to Step 7.

(See EVP CONTROL UNIT REMOVAL/INSTALLATION.)

4

• Switch the ignition ON (engine off).

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

• VP_PV

• VPR1_V

• VPWR

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

• Compare the values of VP_PV and VPWR with the PID VPR1_V verified when the VPR1_V PID is On.

• Is VP_PV within the 90% to 110% VPWR range?

Yes

Go to the next step.

No

Replace the EVP control unit, then go to Step 7.

(See EVP CONTROL UNIT REMOVAL/INSTALLATION.)

5

• Using the M-MDS, clear the DTC from the EVP control unit.

  (See CLEARING DTC [EVP CONTROL UNIT].)

• Switch the ignition ON (engine off).

• Using the M-MDS, perform the EVP control unit ODDTC self test.

  (See DTC INSPECTION [EVP CONTROL UNIT].)

• Is the same DTC present?

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

• Using the M-MDS, clear the DTC from the EVP control unit.

  (See CLEARING DTC [EVP CONTROL UNIT].)

• Using the M-MDS, perform the EVP control unit DTC inspection

  (See DTC INSPECTION [EVP CONTROL UNIT].)

• Is the same DTC present?

Yes

Repeat the inspection from Step1.

If the malfunction recurs, replace the EVP control unit, then go to the next step.

(See EVP CONTROL UNIT REMOVAL/INSTALLATION.)

No

Go to the next step.

7

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [EVP CONTROL UNIT].)

No

DTC troubleshooting completed.