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Diagnostic Procedure

WARNING: This page is about a different car, the 2014 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
ADVANCED KEYLESS ENTRY SYSTEM DOES NOT OPERATE (SECURITY AND LOCKS) DIAGNOSTIC PROCEDURE

Step Inspection Action
1 DETERMINE IF MALFUNCTION CAUSE IS DOOR LOCK 
  • Refer to "door lock does not operate" symptom troubleshooting and perform the inspection.

    (See DOOR LOCK DOES NOT OPERATE .)

  • Is the advanced keyless entry system operating normally?
 Yes Troubleshooting completed. (Explain the contents of the servicing to the customer.)
No Go to the next step.
2 VERIFY IF MALFUNCTION CAUSE IS OPERATION OTHER THAN OPERATION PERMISSION CONDITION 
  • Verify the advanced keyless operation by operating each request switch and the trunk lid opener switch with all the following conditions met.
    • All doors and trunk lid closed
    • Ignition switched off (LOCK)
    • Remote transmitter is within reception area (80 cm radius from driver's door, front passenger's door, and trunk lid)
  • Is the advanced keyless entry system operating normally?
 Yes System is normal. (Explain to customer about operation range of advanced keyless entry system)
No Go to the next step.
3 VERIFY MALFUNCTION SYMPTOM 
  • Does the trunk lid open using the trunk lid opener switch operation?
 Yes Go to Step 6.
No Go to the next step.
4 DETERMINE IF MALFUNCTION CAUSE IS TRUNK LID OPENER SWITCH 
  • Measure the voltage at rear body control module (RBCM) terminal 4M.
  • Is the voltage normal?

    Specification 

    Trunk lid opener switch pressed: 1.0 or less

    Except above: 4.5 V

 Yes Go to Step 11.
No Go to the next step.
5 INSPECT IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS MODULE (RBCM) AND TRUNK LID OPENER SWITCH 
  • Disconnect the negative battery cable.

    (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5] .)

  • Disconnect the rear body control module (RBCM) and trunk lid opener switch connector.
  • Inspect for continuity between the following terminals (vehicle wiring harness).
    • Trunk lid opener switch terminal C and rear body control module (RBCM) terminal 4M
  • Is there continuity?
 Yes
No
  • Repair or replace the wiring harness for an open circuit.
  • After repair procedure, go to Step 11.
6 VERIFY MALFUNCTION SYMPTOM 
 Yes Go to Step 11.
No Go to the next step.
7 INSPECT IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN START STOP UNIT AND DOOR LOCK LINK SWITCH (DRIVER-SIDE) 
  • Disconnect the start stop unit and the front door latch and lock actuator (driver's side) connector.
  • Inspect for continuity between the following terminals (vehicle wiring harness).
    • Start stop unit terminal 1P and front door lock link switch terminal D
  • Is there continuity?
 Yes Go to the next step.
No
  • Repair or replace the wiring harness for an open circuit.
  • After repair procedure, go to Step 11.
8 INSPECT IF MALFUNCTION CAUSE IS SHORT TO GROUND IN WIRING HARNESS BETWEEN START STOP UNIT AND DOOR LOCK LINK SWITCH (DRIVER-SIDE) 
  • Verify that the start stop unit connector is disconnected.
  • Inspect for continuity between the following wiring harness terminals (vehicle wiring harness side) and body ground.
    • Start stop unit terminal 1P and ground
  • Is there continuity?
 Yes Go to the next step.
No
  • Repair or replace the wiring harness for an open circuit.
  • After repair procedure, go to Step 11.
9 INSPECT IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN START STOP UNIT AND GROUND 
  • Verify that the start stop unit connector is disconnected.
  • Inspect for continuity between the following terminals (vehicle wiring harness).
    • Start stop unit terminal 1AF and ground
    • Start stop unit terminal 2B and ground
  • Is there continuity?
 Yes Go to the next step.
No
  • Repair or replace the wiring harness for an open circuit.
  • After repair, go to Step 11.
10 INSPECT IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN REQUEST SWITCH AND LF CONTROL UNIT 
  • Disconnect the negative battery cable.

    (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5] .)

  • Disconnect the LF control unit and request switch connector.
  • Inspect for continuity between the following terminals (vehicle wiring harness).
    • Request switch (LF) terminal G and LF control unit terminal D
    • Request switch (RF) terminal E and LF control unit terminal D
  • Is there continuity?
 Yes Go to the next step.
No
  • Repair or replace the wiring harness for an open circuit.
  • After repair, go to the next step.
11 VERIFY IF MALFUNCTION CAUSE WAS CORRECTED 
  • Does the advanced keyless entry system operate normally?
 Yes Troubleshooting completed. (Explain the contents of the servicing to the customer.)
No If the malfunction has not been resolved, repeat the inspection from Step 1.
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