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Home >> Mazda >> 2022 >> MX-5 Miata RF Club >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> On-Board Diagnostics - Electric Vacuum Pump (EVP) >> DTC C1036-13: Electric Vacuum Pump Relay 2 - Stuck Off [EVP Control Unit] >> Diagnostic Procedure

Diagnostic Procedure

DTC C1036:13 (EVP CONTROL UNIT) DIAGNOSTIC PROCEDURE

Step INSPECTION Action
1 RECORD SNAPSHOT DATA TO UTILIZE WITH REPEATABILITY VERIFICATION 
NOTE:
  • Recording can be facilitated using the screen capture function of the PC.
  • Record the snapshot data on the repair order.
 - Go to the next Step.
2 DETERMINE WHETHER MALFUNCTION IS PAST OR PRESENT 
NOTE:
  • When clearing the DTC, the snapshot data is also cleared at the same time. Snapshot 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 MMDS:
    • 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 1 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 SNAPSHOT DATA 
  • Switch the ignition ON (engine off).
  • Access the following EVP control unit PIDs using the MMDS:
    • VP_MV
    • VPR2_V
  • Drive the vehicle based on the service questions content and snapshot data driving conditions.
  • Verify PID VP_MV when the VPR2 V PID is On.
  • Is the VP_MV PID value 1 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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