Toyota Venza: Vehicle Speed or Engine Speed Signal Malfunction (C2173/73)

Toyota Venza Service Manual / Tire Pressure Monitoring / Tire Pressure Warning System / Vehicle Speed or Engine Speed Signal Malfunction (C2173/73)

DESCRIPTION

The tire pressure warning ECU receives a vehicle speed signal from the combination meter and an engine speed signal from the ECM. The tire pressure warning ECU uses these signals to detect DTCs C2121/21 to C2124/24 (No Signal from Transmitter).

DTC No.	DTC Detection Condition	Trouble Area
C2173/73	When either of the following conditions is met for a total of 15 minutes: (a) No engine speed signal while vehicle speed is 8 km/h (5 mph) or more (b) No vehicle speed signal while engine speed is a specified value	Combination meter ECM Wire harness or connector Tire pressure warning ECU

DTC No.

DTC Detection Condition

Trouble Area

C2173/73

When either of the following conditions is met for a total of 15 minutes:

(a) No engine speed signal while vehicle speed is 8 km/h (5 mph) or more

(b) No vehicle speed signal while engine speed is a specified value

Combination meter
ECM
Wire harness or connector
Tire pressure warning ECU

HINT:

This DTC is set at the same time as DTCs C2121/21 to C2124/24 are being set.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

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 registration (See page ) of the transmitter IDs into the tire
pressure warning ECU if the ECU has been replaced.

PROCEDURE

1.	PERFORM SIGNAL CHECK (VEHICLE SPEED SIGNAL AND ENGINE SPEED SIGNAL)

(a) Enter the signal check mode in Test Mode Procedure (See page ).

(b) Drive the vehicle at 20 km/h (12 mph) or more for 10 seconds to clear DTC C2191/91.

(d) Check for signal check DTCs.

Result	Proceed to
DTCs C2191/91 and C2194/94 are cleared	A
DTC C2191/91 is output	B
DTC C2194/94 is output	C

HINT:

DTCs C2181/81 to C2184/84 (Transmitter ID not Received) are output at this time, but they are not related to this check.

USE SIMULATION METHOD TO CHECK

GO TO DTC C2191/91

GO TO DTC C2194/94

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DIAGNOSTIC TROUBLE CODE CHART HINT: If a trouble code is displayed during the DTC check, inspect the circuit listed for that code. For details of each code, refer to the relevant page listed under ...

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