E: DTC P1574 Key Communication Failure

DTC DETECTING CONDITION:

Failure of body integrated unit to verify key (transponder) ID code

DIAGNOSTIC PROCEDURE CHART

Step	Check	Yes	No
1 CHECK BODY INTEGRATED UNIT FUNCTION. Insert the key into the ignition switch (LOCK position), then measure changes in voltage between the antenna connectors. Connector & terminal (B142) No. 1 (+) - No. 2 (-):	Is the voltage -30 to 30 V? (Approx. 0.1 second after inserting the key) Is the voltage 0 V? (Approx. 1 second after inserting the key)	Go to step 2.	Replace the body integrated unit < Ref. to , BODY INTEGRATED UNIT . > and replace all the ignition keys (including transponder). Execute the registration procedure next. Refer to the "Registration Manual For Immobilizer".
2 CHECK IGNITION KEY (TRANSPONDER). Remove the key from ignition switch. Start the engine using other key which is already registered.	Does the engine start?	Replace the ignition key (including the transponder). Execute the registration procedure next. Refer to the "Registration Manual For Immobilizer".	Replace the body integrated unit < Ref. to , BODY INTEGRATED UNIT . > and replace all the ignition keys (including transponder). Execute the registration procedure next. Refer to the "Registration Manual For Immobilizer".