DTC C1035:12 [EVP CONTROL UNIT]
id040251839800
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DTC
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C1035:12
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Electric vacuum pump relay 1: short to power supply
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DETECTION CONDITION
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• 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.
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FAIL-SAFE FUNCTION
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• Refer to “Fail-safe function table”. (See DTC TABLE [EVP CONTROL UNIT].)
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POSSIBLE CAUSE
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• 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
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SYSTEM WIRING DIAGRAM
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Diagnostic Procedure
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Step |
Inspection |
Action |
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1
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RECORD SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS TO UTILIZE WITH REPEATABILITY VERIFICATION
• Record the snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (fuel system related) on the repair order.
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—
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Go to the next step.
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2
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DETERMINE WHETHER MALFUNCTION IS PAST OR PRESENT
• Using the M-MDS, clear the DTC from the EVP control unit.
• Switch the ignition ON (engine off).
• Using the M-MDS, perform the EVP control unit DTC inspection.
• Is the same DTC present?
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Yes
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Replace the EVP control unit, then go to Step 7.
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No
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Go to the next step.
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3
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DETERMINE WHETHER MALFUNCTION IS PAST OR PRESENT USING PID/DATA MONITOR FUNCTION
• Switch the ignition ON (engine off).
• Access the following EVP control unit PIDs using the M-MDS:
• 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?
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Yes
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Replace the EVP control unit, then go to Step 7.
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No
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Go to the next step.
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4
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VERIFY DTC REPEATABILITY
• Using the M-MDS, clear the DTC from the 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.
• Is the same DTC present?
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Yes
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Replace the EVP control unit, then go to Step 7.
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No
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Go to the next step.
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5
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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:
• 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?
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Yes
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Replace the EVP control unit, then go to Step 7.
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No
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Go to the next step.
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6
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VERIFY DTC REPEATABILITY AND DETERMINE IF MALFUNCTION CAUSE IS EVP CONTROL UNIT
• Using the M-MDS, clear the DTC from the EVP control unit.
• Switch the ignition ON (engine off).
• Using the M-MDS, perform the EVP control unit DTC inspection
• Is the same DTC present?
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Yes
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Replace the EVP control unit, then go to the next step.
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No
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DTC troubleshooting completed.
Explain to the customer that there are no malfunctions with the vehicle based on the contents of the servicing.
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7
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VERIFY NO DTC IS PRESENT
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [EVP CONTROL UNIT].)
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No
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DTC troubleshooting completed.
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