DTC B1DA1:14 [RETRACTABLE HARDTOP CONTROL MODULE]

id0902r4076500

Description

Top lock motor circuit malfunction

Detection condition

•  The retractable hardtop control module cannot receive a signal from the top lock motor while the top lock motor is operating.

Fail-safe

•  Stops retractable hardtop operation

Possible cause

•  Retractable hardtop control module power supply circuit malfunction

―  Short to ground in wiring harness between retractable hardtop control module terminal 1B and DC-DC converter (i-ELOOP) terminal 4A

―  CABIN+ 50 A fuse malfunction

―  RHT L 30 A fuse malfunction

―  Open circuit in wiring harness between retractable hardtop control module terminal 1B and DC-DC converter (i-ELOOP) terminal 4A

•  Short to ground in wiring harness between the following terminals:

―  Retractable hardtop control module terminal 2B and top lock motor terminal E

―  Retractable hardtop control module terminal 2F and top lock motor terminal A

•  Open circuit in wiring harness between the following terminals:

―  Retractable hardtop control module terminal 2B and top lock motor terminal E

―  Retractable hardtop control module terminal 2F and top lock motor terminal A

•  Top lock motor malfunction

•  Retractable hardtop control module malfunction

Description	Top lock motor circuit malfunction
Detection condition	• The retractable hardtop control module cannot receive a signal from the top lock motor while the top lock motor is operating.
Fail-safe	• Stops retractable hardtop operation
Possible cause	• Retractable hardtop control module power supply circuit malfunction ― Short to ground in wiring harness between retractable hardtop control module terminal 1B and DC-DC converter (i-ELOOP) terminal 4A ― CABIN+ 50 A fuse malfunction ― RHT L 30 A fuse malfunction ― Open circuit in wiring harness between retractable hardtop control module terminal 1B and DC-DC converter (i-ELOOP) terminal 4A • Short to ground in wiring harness between the following terminals: ― Retractable hardtop control module terminal 2B and top lock motor terminal E ― Retractable hardtop control module terminal 2F and top lock motor terminal A • Open circuit in wiring harness between the following terminals: ― Retractable hardtop control module terminal 2B and top lock motor terminal E ― Retractable hardtop control module terminal 2F and top lock motor terminal A • Top lock motor malfunction • Retractable hardtop control module malfunction

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 6. (See RETRACTABLE HARDTOP CONTROL MODULE REMOVAL/INSTALLATION.)
1		No	Go to the next step.
2	VERIFY RETRACTABLE HARDTOP CONTROL MODULE POWER SUPPLY VOLTAGE • Measure the voltage at the following terminal (wiring harness-side): ― Retractable hardtop control module terminal 1B • Is the voltage B+?	Yes	Go to the next step.
2		No	Inspect the CABIN+B 50 A fuse, RHT L 30 A fuse. • Any fuse is blown: ― Refer to the wiring diagram and verify whether or not there is a common connector between the following: • Retractable hardtop control module terminal 1B and DC-DC converter (i-ELOOP) terminal 4A 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. • Replace the fuse. • Any fuse is damaged: ― Replace the fuse. • All fuses are normal: ― Refer to the wiring diagram and verify whether or not there is a common connector between the following: • Retractable hardtop control module terminal 1B and DC-DC converter (i-ELOOP) terminal 4A 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 6.
3	INSPECT TOP LOCK MOTOR 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 top lock motor connectors. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― Top lock motor terminal E ― Top lock motor 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 hardtop control module terminal 2B and top lock motor terminal E • Retractable hardtop control module terminal 2F and top lock motor 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 6.
3		No	Go to the next step.
4	INSPECT TOP LOCK MOTOR CIRCUIT FOR OPEN CIRCUIT • Verify that the retractable hardtop control module and top lock motor connectors are disconnected. • Inspect the wiring harness for continuity between the following terminals (wiring harness-side): ― Retractable hardtop control module terminal 2B and top lock motor terminal E ― Retractable hardtop control module terminal 2F and top lock motor terminal A • 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 2B and top lock motor terminal E • Retractable hardtop control module terminal 2F and top lock motor 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 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 6.
5	INSPECT TOP LOCK MOTOR • Inspect the top lock motor. (See TOP LOCK MOTOR INSPECTION.) • Is the top lock motor normal?	Yes	Go to the next step.
5		No	Replace the top lock motor, then go to the next step. (See TOP LOCK MOTOR REMOVAL/INSTALLATION.)
6	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.
6		No	Go to the next step.
7	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].)
7		No	DTC troubleshooting completed.