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

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DTC C1036:11 [EVP CONTROL UNIT]

DTC	C1036:11	Electric vacuum pump relay 2: short to ground
DETECTION CONDITION		EVP control unit terminal E voltage is less than 1 V for a continuous 0.5 s when electric vacuum pump relay 2 is turned off.
FAIL-SAFE FUNCTION		Refer to “Fail-safe function table”. (See DTC TABLE [EVP CONTROL UNIT].)
POSSIBLE CAUSE		Short to ground circuit in wiring harness between electric vacuum pump terminal A and EVP control unit terminal E Short to ground circuit in electric vacuum pump relay 2 circuit Electric vacuum pump relay 2 (built-into EVP control unit) stuck ON EVP control unit malfunction

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	INSPECT ELECTRIC VACUUM PUMP CIRCUIT FOR SHORT TO GROUND CIRCUIT Switch the ignition OFF. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION) Disconnect the electric vacuum pump and EVP control unit connectors. Inspect for continuity between electric vacuum pump terminal A (wiring harness-side) and body ground. Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between electric vacuum pump terminal A and EVP control unit terminal E. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to ground circuit. Go to Step 7.
		No	Go to the next step.
3	DETERMINE WHETHER MALFUNCTION IS PAST OR PRESENT Switch the ignition ON (engine off). Access the following EVP control unit PIDs using the M-MDS: VP_MV VPR2_V Verify PID VP_MV when the VPR2_V PID is Off. Is the VP_MV PID value 1 V or more?	Yes	Go to the next step.
		No	Replace the EVP control unit, then go to Step 8. (See EVP CONTROL UNIT REMOVAL/INSTALLATION.)
4	VERIFY DTC REPEATABILITY 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 8. (See EVP CONTROL UNIT REMOVAL/INSTALLATION.)
		No	Go to the next step.
5	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 Off. Is the VP_MV PID value 1 V or more?	Yes	Go to the next step.
		No	Replace the EVP control unit, then go to Step 8. (See EVP CONTROL UNIT REMOVAL/INSTALLATION.)
6	VERIFY DTC REPEATABILITY AND DETERMINE IF MALFUNCTION CAUSE IS EVP CONTROL UNIT 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 8. (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	VERIFY DTC TROUBLESHOOTING COMPLETED 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.
8	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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