DTC Troubleshooting

NOTE:

This DTC might be detected when battery is run down or the voltage is very low.
Before performing troubleshooting, remove aftermarket devices connected to the line via "ACC" fuse and devices that have a backup power supply function located in their accessory socket (non-genuine devices, optional parts, audio, etc.). Voltage from these devices may cause this DTC to be detected during diagnosis.

DIAGNOSIS PROCEDURE

Step	Action	YES	NO
1	ACC relay power supply circuit (switch side) check Confirm that ignition mode of keyless push start system is "OFF". Remove ACC relay. Check that voltage between "A1" circuit terminal of ACC relay connector and ground is battery voltage. Is it in good condition?	Go to Step 2.	Repair or replace defective wire harness and "IGN" fuse.
2	Fuse check Check "ACC" fuse. Is it in good condition?	Go to Step 4.	Go to Step 3.
3	ACC relay signal circuit check Push engine switch to change ignition mode to "OFF". Disconnect "L01" connector. Check for proper terminal connection to "L01" connector. If connections are OK, check the following points. Resistance between "B1" circuit and ground: infinity Resistance between "B1" circuit terminal and each terminal at ACC relay connector: infinity Are they in good condition?	Replace "ACC" fuse and keyless start control module and recheck DTC, see KEYLESS START CONTROL MODULE REMOVAL AND INSTALLATION .	Repair or replace defective wire harness, and then replace "ACC" fuse.
4	ACC relay signal circuit check Push engine switch to change ignition mode to "OFF". Disconnect "L01" connector. Check for proper terminal connection to "L01" connector. If connections are OK, check the following points. Resistance of "B1" circuit: less than 3 Ω Resistance between "B1" circuit terminal and each terminal at ACC relay connector: infinity Voltage of "B1" circuit: 0 - 1 V (with ignition mode of keyless push start system in "ON") Are they in good condition?	Go to Step 5.	Repair or replace defective wire harness.
5	ACC relay power supply circuit (coil side) check Check the following points. Resistance of "C1" circuit: less than 3 Ω Resistance between "C1" circuit and ground: infinity Resistance between "C1" circuit terminal and each terminal at ACC relay connector: infinity Voltage of "C1" circuit: 0 - 1 V (with ignition mode of keyless push start system in "ON") Are they in good condition?	Go to Step 6.	Repair or replace defective wire harness.
6	ACC relay check Check ACC relay, see CONTROL RELAY INSPECTION . Is it in good condition?	Replace keyless start control module and recheck DTC, see KEYLESS START CONTROL MODULE REMOVAL AND INSTALLATION .	Replace ACC relay.