Keyless Access System Check (2016 2017 2018 2019 2020)

1. Connect the HDS to the data link connector (DLC) - Refer to: How to Troubleshoot the Body Electrical (2016), or How to Troubleshoot the Body Electrical (2014 2015), or How to Troubleshoot the Body Electrical (2017 2018 2019 2020)

2. Turn the vehicle to the ON mode.

3. 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.

4. At KEYLESS ACCESS CONTROL UNIT, enter KEYLESS ACCESS SYSTEM INFORMATION, then select SYSTEM CHECK 1 or SYSTEM CHECK 2.

5. At BACKUP CONTROL UNIT, enter SYSTEM INFORMATION, then select SYSTEM CHECK.

6. 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 2-way transceiver failure LF interior antenna failure Keyless remote is not registered	Keyless remote test 2-way transceiver test LF interior antenna test Register the keyless remote
B-1B-2G-1	PCM is replaced No communication between Keyless Access/TPMS Control Unit and PCM Open in the IG1 line Keyless Access/TPMS Control Unit is replaced	Register the PCM Check PCM Check harness 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 Open in the IG1 SAFETY line Keyless Access/TPMS Control Unit is replaced	Register the Keyless Access/TPMS Control Unit Check MICU Check harness
C-3C-4	Electric Steering Lock is replaced* Keyless Access/TPMS Control Unit is replaced	Register the Keyless Access/TPMS Control Unit Register the Electric Steering Lock* Check for an open or short in the wire IGN TRX lines
G-5	Electric Steering Lock is replaced* Keyless Access/TPMS Control Unit is replaced	Register the Keyless Access/TPMS Control Unit Register the Electric Steering Lock* Check for an open or short in the wire IGN TRX lines

*: With electric steering lock

System Check 2 (Keyless Access/TPMS Control Unit)

System Check No.	Possible cause	Check items
D-1D-2D-3	S-NET line is short No communication between Keyless Access/TPMS Control Unit and MICU (Imoes unit) No communication between Keyless Access/TPMS Control Unit and PCM	Check harness Check MICU Check PCM
D-4D-5	IGN TRX line trouble	Check IGN TRX line

System Check (Backup Control Unit)

System Check No.	Possible cause	Check items
A-1A-2A-3	Keyless remote is mismatched Engine Start/Stop Switch failure Keyless remote is not registered	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) Open in the IG1 line	Register the Keyless Access/TPMS Control Unit Check MICU Check harness
D-1D-2D-3	S-NET line is short No communication between Keyless Access/TPMS Control Unit and MICU (Imoes unit) No communication between Keyless Access/TPMS Control Unit and PCM	Check harness Check MICU Check PCM
E-1E-2E-3E-4E-5	Keyless Access/TPMS Control Unit is not registered	Register the Keyless Access/TPMS Control Unit
F-1F-2F-3F-4F-5	Special Mode	Turn the vehicle to the ON mode and then select the OFF (LOCK) mode with a registered keyless remote