DTC P161B (Flash Code 179) Immobilizer Wrong Response (RZ4E-TC)

1. DTC P161B description

The ECM communicates with the wireless access module and performs the immobilizer function. The ECM sends a request signal to the wireless access module. The ECM receives a response signal from the wireless access module. Both communication signals are sent and received via the CAN communication circuit. If the ECM receives an incorrect response signal from the wireless access module, the DTC is set.

2. Condition for setting DTC P161B

Condition for setting the DTC

The ECM detects that an incorrect immobilizer response signal from the wireless access module is received.

3. Action taken when DTC P161B sets

Euro4: The ECM does not illuminate the MIL or SVS indicator light. Refer to Action taken when DTC sets - Type D (Euro4).
Except Euro4: The ECM does not illuminate the check engine warning light. Refer to Action taken when DTC sets - Type D (Except Euro4).

Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC type definitions".

The ECM inhibits engine startup.

4. Condition for clearing DTC P161B

Refer to Condition for clearing the DTC - Type D.

Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC type definitions".