Toyota 4Runner manuals

Toyota 4Runner: 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.

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

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

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)



OK

REPLACE TIRE PRESSURE WARNING ANTENNA AND RECEIVER


NG

REPLACE TIRE PRESSURE WARNING ECU

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