Toyota 4Runner: Receiver Error (C2176/76)

Toyota 4Runner Service Manual / Suspension / Tire Pressure Monitoring / Tire Pressure Warning System / Receiver Error (C2176/76)

DESCRIPTION

The signals are transmitted to the tire pressure warning antenna and receiver on the body as radio waves and then sent to the tire pressure warning ECU.

DTC Code	DTC Detection Condition	Trouble Area
C2176/76	A malfunction in the tire pressure warning ECU internal circuit.	Tire pressure warning antenna and receiver Harness or connector Tire pressure warning ECU

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the tire pressure warning ECU, read the IDs stored in the old ECU using the Techstream and write them down before removal.
It is necessary to perform registration of the transmitter IDs into the tire pressure warning ECU after the ECU and/or the tire pressure warning valve and transmitter has been replaced (See page ).

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (ECU - RECEIVER)

(a) Disconnect the F7 ECU connector.

(b) Disconnect the V3 receiver connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
F7-12 (RDA) - V3-1 (RDA)	Always	Below 1 Ω
F7-11 (GND2) - V3-4 (GND)	Always	Below 1 Ω
F7-6 (RF5V) - V3-5 (+5V)	Always	Below 1 Ω
F7-12 (RDA) or V3-1 (RDA) - Body ground	Always	10 kΩ or higher
F7-11 (GND2) or V3-4 (GND) - Body ground	Always	10 kΩ or higher
F7-6 (RF5V) or V3-5 (+5V) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	CHECK TIRE PRESSURE WARNING ECU

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
F7-6 (RF5V) - F7-11 (GND2)	Ignition switch ON	4.5 to 5.5 V

Text in Illustration

*a	Component with harness connected (Tire Pressure Warning ECU)

REPLACE TIRE PRESSURE WARNING ANTENNA AND RECEIVER

REPLACE TIRE PRESSURE WARNING ECU

Diagnostic Trouble Code Chart

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