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Home >> Mazda >> 2017 >> MX-5 Miata RF Club, Automatic Trans >> Repair and Diagnosis >> Body & Frame >> Door Locks >> On-Board Diagnostic - Retractable Fastback Control Module >> DTC B1DA5-29; Incorrect Rear Roof Position >> Diagnostic Procedure

Diagnostic Procedure

Step Inspection Action
1 VERIFY OTHER RETRACTABLE FASTBACK CONTROL MODULE DTCs
 Yes Replace the retractable fastback control module, then go to Step 7.
(See RETRACTABLE FASTBACK CONTROL MODULE REMOVAL/INSTALLATION ).
No Go to the next step.
2 REAR ROOF LINK LIMIT SWITCH (RH) CIRCUIT FOR SHORT TO GROUND
  • Switch the ignition off.
  • Disconnect the negative battery cable.

    (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION ).

  • Disconnect the retractable fastback control module and rear roof link limit switch (RH) connectors.
  • Inspect for continuity between the following terminals (wiring harness-side) and body ground:
    • Rear roof link limit switch (RH) terminal A
  • Is there continuity?
 Yes Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
  • Retractable fastback control module terminal 4D and rear roof link limit switch (RH) terminal A

    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.
  • Repair or replace the malfunctioning part.

    If there is no common connector:

  • Repair or replace the wiring harness which has a short to ground.

Go to Step 7.
No Go to the next step.
3 REAR ROOF LINK LIMIT SWITCH (RH) CIRCUIT FOR OPEN CIRCUIT
  • Verify that the retractable fastback control module and front roof link motor (RH) connectors are disconnected.
  • Inspect the wiring harness for continuity between the following terminals (wiring harness-side):
    • Retractable fastback control module terminal 4A and rear roof link limit switch (RH) terminal B
    • Retractable fastback control module terminal 4E and rear roof link limit switch (RH) terminal C
  • Is there continuity?
 Yes Go to the next step.
No Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
  • Retractable fastback control module terminal 4A and rear roof link limit switch (RH) terminal B
  • Retractable fastback control module terminal 4E and rear roof link limit switch (RH) terminal C

    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 an open circuit.
  • Repair or replace the malfunctioning part.

    If there is no common connector:

  • Repair or replace the wiring harness which has an open circuit.

Go to Step 7.
4 REAR ROOF LINK LIMIT SWITCH (LH) CIRCUIT FOR SHORT TO GROUND
  • Verify that the retractable fastback control module and front roof link motor (RH) connectors are disconnected.
  • Inspect for continuity between the following terminals (wiring harness-side) and body ground:
    • Rear roof link limit switch (LH) terminal A
  • Is there continuity?
 Yes Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
  • Retractable fastback control module terminal 4I and rear roof link limit switch (LH) terminal A

    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.
  • Repair or replace the malfunctioning part.

    If there is no common connector:

  • Repair or replace the wiring harness which has a short to ground.

Go to Step 7.
No Go to the next step.
5 REAR ROOF LINK LIMIT SWITCH (LH) CIRCUIT FOR OPEN CIRCUIT
  • Verify that the retractable fastback control module and front roof link motor (LH) connectors are disconnected.
  • Inspect the wiring harness for continuity between the following terminals (wiring harness-side):
    • Retractable fastback control module terminal 4J and rear roof link limit switch (LH) terminal B
    • Retractable fastback control module terminal 4F and rear roof link limit switch (LH) terminal C
    • Retractable fastback control module terminal 4F and rear roof link limit switch (LH) terminal D
  • Is there continuity?
 Yes Go to the next step.
No Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
  • Retractable fastback control module terminal 4J and rear roof link limit switch (LH) terminal B
  • Retractable fastback control module terminal 4F and rear roof link limit switch (LH) terminal C
  • Retractable fastback control module terminal 4F and rear roof link limit switch (LH) terminal D

    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 an open circuit.
  • Repair or replace the malfunctioning part.

    If there is no common connector:

  • Repair or replace the wiring harness which has an open circuit.

Go to Step 7.
6 REAR ROOF LINK LIMIT SWITCH
 Yes Go to the next step.
No Replace the ear roof link limit switch (RH) or (LH), then go to the next step.
(See REAR ROOF LINK LIMIT SWITCH REMOVAL/INSTALLATION ).
7 VERIFY THAT REPAIRS HAVE BEEN COMPLETED
 Yes Repeat the inspection from Step 1.

Go to the next step.
No Go to the next step.
8 VERIFY IF OTHER DTCs DISPLAYED
  • Are any other DTCs displayed?
 Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [RETRACTABLE FASTBACK CONTROL MODULE] ).
No DTC troubleshooting completed.
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