C2196

TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: C2196/96: RSSI Signal Error (Test Mode DTC)
C2196/96 - RSSI Signal Error (Test Mode DTC)

DESCRIPTION

The tire pressure warning ECU receives a RSSI signal from the tire pressure warning antenna and receiver. This DTC is stored upon entering test mode, and cleared when an RSSI signal between 49 mV and 4.95 V is received for 3 seconds or more.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When replacing the tire pressure warning ECU, read the transmitter IDs stored in the old ECU using the Techstream and write them down before removal.
* It is necessary to perform initialization Initialization after registration Registration of the transmitter IDs into the tire pressure warning ECU if the ECU has been replaced.

PROCEDURE

1. CHECK OUTPUT DTC (DTCs C2121/21 to C2124/24)

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / Tire Pressure Monitor / Trouble Codes.

(f) Read the DTCs.

Result:





B -- GO TO DTCs C2121/21 to C2124/24 Transmitter ID4 not Received (Test Mode DTC) - Tire Pressure Monitoring
A -- Continue to next step.

2. INSPECT TIRE PRESSURE WARNING ECU (RSSI SIGNAL)

(a) Disconnect the L4 ECU connector.





(b) Turn the power switch on (IG).

(c) Check the waveform of the ECU connector using an oscilloscope while idling the engine.

OK:





Text in Illustration





Tool Setting





HINT
* The shape of waves like figure appears approximately 2 times every 3 minutes.
* Figure is one example, and the voltage with few changes might be detected between 49 mV and 4.95 V.

NG -- CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU - ANTENNA AND RECEIVER)

OK -- REPLACE TIRE PRESSURE WARNING ECU Removal

3. CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU - ANTENNA AND RECEIVER)

(a) Disconnect the L4 ECU connector.

(b) Disconnect the R2 tire pressure warning antenna and receiver connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE TIRE PRESSURE WARNING ANTENNA AND RECEIVER