Keyless Access System Check (2016-17)

WARNING: This page is about a different car, the 2016 Acura RDX, 2015 Acura RDX, 2014 Acura RDX, and 2013 Acura RDX. However, it is still accessible from the selected car via links, so may be relevant.

Connect the HDS to the data link connector (DLC) .
Press the engine start/stop button to select the ON mode.
On the HDS screen, at SYSTEM SELECTION MENU, enter ONE-PUSH START, then select KEYLESS ACCESS CONTROL UNIT or BACKUP CONTROL UNIT.
NOTE: If the HDS does not communicate, check the keyless access/TPMS control unit power, ground, K line, and L-line connectors.
At KEYLESS ACCESS CONTROL UNIT, enter KEYLESS ACCESS SYSTEM INFORMATION, then select SYSTEM CHECK 1 or SYSTEM CHECK 2.
At BACKUP CONTROL UNIT, enter SYSTEM INFORMATION, then select SYSTEM CHECK.
If the HDS displays NORMAL N-1, the immobilizer system is OK at this time, refer to the STATUS LOG. If the HDS displays any other messages, check as follows:

System Check 1 (Keyless Access/TPMS Control Unit)

System Check No.	Possible cause	Check items
A-1A-2A-3G-4	Keyless remote is mismatched No communication between keyless access/TPMS control unit and keyless remote Keyless remote is not registered 2-way transceiver failure^*2	Register the keyless remote LF interior antenna test Check antenna level with the HDS 2-way transceiver test^*2
B-1B-2G-1	PCM is not registered No communication between keyless access/TPMS control unit and PCM Keyless access/TPMS control unit is replaced	Register the PCM Check PCM Check for an open in the S-NET lines Register the keyless access/TPMS control unit
C-1C-2G-2G-3	MICU (Imoes unit) is replaced Communication error between keyless access/TPMS control unit and MICU Keyless access/TPMS control unit is replaced	Register the MICU Register the keyless access/TPMS control unit Check MICU Check for an open or short in the S-NET lines
C-3C-4G-5	Keyless access/TPMS control unit is replaced Communication error between keyless access/TPMS control unit and electric steering lock^1 Electric steering lock is not registered^1	Register the keyless access/TPMS control unit Check for an open or short in the IGN TRX line^1 Check electric steering lock^1 Register the electric steering lock^*1

*1: Canada and Mexico models*2: With remote engine start

System Check 2 (Keyless Access/TPMS Control Unit)

System Check No.	Possible cause	Check items
D-1D-2D-3	S-NET line is open or short No communication between keyless access/TPMS control unit and MICU (imoes unit) No communication between keyless access/TPMS control unit and PCM	Check for an open or short in the S-NET lines Check MICU Check PCM

System Check No.	Possible cause	Check items
D-4D-5	IGN TRX line is open or short	Check for an open or short in the IGN TRX line

System Check (Backup Control Unit)

System Check No.	Possible cause	Check items
A-1A-2A-3	Keyless remote is mismatched Keyless remote is not registered Engine start/stop switch failure	Register the keyless remote Check engine start/stop switch
B-1B-2	PCM is replaced Communication error between keyless access/TPMS control unit and PCM	Register the PCM Check PCM
C-1C-2	MICU is replaced Communication error between keyless access/TPMS control unit and MICU (imoes unit)	Register the keyless access/TPMS control unit Check MICU Check for an open in the S-NET lines
D-1D-2D-3	S-NET line is open or short No communication between keyless access/TPMS control unit and MICU (imoes unit) No communication between keyless access/TPMS control unit and PCM	Check for an open or short in the S-NET lines Check MICU Check PCM
E-1E-2E-3E-4E-5	Keyless access/TPMS control unit is not registered PCM is not registered MICU is not registered Keyless remote is not registered	Register the keyless access/TPMS control unit Register the PCM Register the MICU Register the keyless remote
F-1F-2F-3F-4F-5	Special mode	Press the engine start/stop button to select the ON mode and then the OFF mode with a registered keyless remote