B1191

DTC B1191

DTC Detecting Condition and Trouble Area






Circuit Diagram










DTC Confirmation Procedure

1) Confirm that ignition mode of keyless push start system is in "OFF".
2) Push engine switch to change ignition mode to "ACC".
3) Push engine switch to change ignition mode to "ON".
4) Repeat Step 1) through 3) several times.

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.


1. ACC relay power supply circuit (switch side) check
Confirm that ignition mode of keyless push start system is in "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?
YES
Go to Step 2.
NO
Repair or replace defective wire harness and "IGN" fuse.
2. Fuse check
Check "ACC" fuse.
Is it in good condition?
YES
Go to Step 4.
NO
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?
YES
Replace "ACC" fuse and keyless start control module and recheck DTC. Service and Repair
NO
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
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?
YES
Go to Step 5.
NO
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
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?
YES
Go to Step 6.
NO
Repair or replace defective wire harness.
6. ACC relay check
Check ACC relay. Testing and Inspection
Is it in good condition?
YES
Replace keyless start control module and recheck DTC. Service and Repair
NO
Replace ACC relay.