DTC

C1035:12

Electric vacuum pump relay 1: short to power supply

DETECTION CONDITION

• EVP control unit terminal C voltage is 90% or more of the battery voltage for a continuous 0.5 s when electric vacuum pump relay 1 is turned off.

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 ON

• Short to power supply circuit in electric vacuum pump relay 1 (built-into EVP control unit) circuit

• Electric vacuum pump relay 1 (built-into EVP control unit) 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 DTC inspection.

  (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

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

• Is PID VP_PV 90% or more of VPWR?

Yes

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

(See EVP CONTROL UNIT REMOVAL/INSTALLATION.)

No

Go to the next step.

4

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

  (See CLEARING DTC [EVP CONTROL UNIT].)

• Switch the ignition ON (engine off).

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

• Electric vacuum pump operation is stopped by simulation item VPS_FBK.

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

  (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.

5

• 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 Off.

• Is PID VP_PV 90% or more of VPWR?

Yes

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

(See EVP CONTROL UNIT REMOVAL/INSTALLATION.)

No

Go to the next step.

6

• 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 DTC inspection

  (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.

7

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [EVP CONTROL UNIT].)

No

DTC troubleshooting completed.