Diagnostic Procedure

WARNING: This page is about a different car, the 2020 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

DTC B1DA2:92 (RETRACTABLE HARDTOP CONTROL MODULE) DIAGNOSTIC PROCEDURE

Step	Inspection		Action
1	VERIFY OTHER RETRACTABLE HARDTOP CONTROL MODULE DTCs Clear the DTC for the retractable hardtop control module using the M-MDS. (See CLEARING DTC [RETRACTABLE HARDTOP CONTROL MODULE] .) Retrieve the retractable hardtop control module DTCs using the M-MDS. (See DTC INSPECTION [RETRACTABLE HARDTOP CONTROL MODULE] .) Is the DTCs U3000:44/U3000:45/U3000:49 displayed?	Yes	Replace the retractable hardtop control module, then go to Step 10. (See RETRACTABLE HARDTOP CONTROL MODULE REMOVAL/INSTALLATION .)
1		No	Go to the next step.
2	INSPECT FRONT ROOF LINK MOTOR (RH) CIRCUIT FOR SHORT TO GROUND Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Disconnect the retractable hardtop control module and front roof link motor (RH) connectors. Inspect for continuity between the following terminals (wiring harness-side) and body ground: Front roof link motor (RH) terminal D Front roof link motor (RH) terminal B Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Retractable hardtop control module terminal 4P and front roof link motor (RH) terminal D Retractable hardtop control module terminal 4O and front roof link motor (RH) terminal B 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 10.
2		No	Go to the next step.
3	INSPECT FRONT ROOF LINK MOTOR (RH) CIRCUIT FOR SHORT TO POWER SUPPLY Verify that the retractable hardtop control module and front roof link motor (RH) connectors are disconnected. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Switch the ignition ON (engine off or on). Measure the voltage at the following terminals (wiring harness-side): Front roof link motor (RH) terminal D Front roof link motor (RH) terminal F Is the voltage 0 V?	Yes	Go to the next step.
3		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Retractable hardtop control module terminal 4P and front roof link motor (RH) terminal D Retractable hardtop control module terminal 4R and front roof link motor (RH) terminal F 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 power supply. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to power supply. Go to Step 10.
4	INSPECT FRONT ROOF LINK MOTOR (RH) CIRCUIT FOR OPEN CIRCUIT Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Verify that the retractable hardtop 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 hardtop control module terminal 4P and front roof link motor (RH) terminal D Retractable hardtop control module terminal 4O and front roof link motor (RH) terminal B Retractable hardtop control module terminal 4R and front roof link motor (RH) terminal F Is there continuity?	Yes	Go to the next step
4		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Retractable hardtop control module terminal 4P and front roof link motor (RH) terminal D Retractable hardtop control module terminal 4O and front roof link motor (RH) terminal B Retractable hardtop control module terminal 4R and front roof link motor (RH) terminal F 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 10.
5	INSPECT FRONT ROOF LINK MOTOR (LH) CIRCUIT FOR SHORT TO GROUND Disconnect the front roof link motor (LH) connectors. Inspect for continuity between the following terminals (wiring harness-side) and body ground: Front roof link motor (LH) terminal D Front roof link motor (LH) terminal B Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Retractable hardtop control module terminal 4T and front roof link motor (LH) terminal D Retractable hardtop control module terminal 4S and front roof link motor (LH) terminal F 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 10.
5		No	Go to the next step.
6	INSPECT FRONT ROOF LINK MOTOR (LH) CIRCUIT FOR SHORT TO POWER SUPPLY Verify that the retractable hardtop control module and front roof link motor (LH) connectors are disconnected. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Switch the ignition ON (engine off or on). Measure the voltage at the following terminals (wiring harness-side): Front roof link motor (LH) terminal D Front roof link motor (LH) terminal F Is the voltage 0 V?	Yes	Go to the next step.
6		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Retractable hardtop control module terminal 4T and front roof link motor (LH) terminal D Retractable hardtop control module terminal 4V and front roof link motor (LH) terminal F 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 power supply. Repair or replace the malfunctioning part. Repair or replace the wiring harness which has a short to power supply. Go to Step 10.
7	INSPECT FRONT ROOF LINK MOTOR (LH) CIRCUIT FOR OPEN CIRCUIT Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Verify that the retractable hardtop 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 hardtop control module terminal 4T and front roof link motor (LH) terminal D Retractable hardtop control module terminal 4S and front roof link motor (LH) terminal B Retractable hardtop control module terminal 4V and front roof link motor (LH) terminal F Is there continuity?	Yes	Go to the next step
7		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Retractable hardtop control module terminal 4T and front roof link motor (LH) terminal D Retractable hardtop control module terminal 4S and front roof link motor (LH) terminal B Retractable hardtop control module terminal 4V and front roof link motor (LH) terminal F 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 10.
8	INSPECT FRONT ROOF LINK Visually inspect the front roof link for foreign matter. Has foreign matter penetrated the front roof link?	Yes	Remove foreign matter from the front roof link, then go to the next step.
8		No	Go to Step 10.
9	INSPECT FRONT ROOF LINK MOTOR Inspect the front roof link motor (RH) and (LH). (See ROOF LINK MOTOR INSPECTION .) Is the front roof link motor (RH) and (LH) normal?	Yes	Go to the next step.
9		No	Replace the front roof link motor (RH) or (LH), then go to the next step. (See ROOF LINK MOTOR REMOVAL/INSTALLATION .)
10	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Always reconnect all disconnected connectors. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Clear the DTC for the retractable hardtop control module using the M-MDS. (See CLEARING DTC [RETRACTABLE HARDTOP CONTROL MODULE] .) Retrieve the retractable hardtop control module DTCs using the M-MDS. (See DTC INSPECTION [RETRACTABLE HARDTOP CONTROL MODULE] .) Is the same Pending DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the retractable hardtop control module. (See RETRACTABLE HARDTOP CONTROL MODULE REMOVAL/INSTALLATION .) Go to the next step.
10		No	Go to the next step.
11	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 HARDTOP CONTROL MODULE] .)
11		No	DTC troubleshooting completed.