Toyota Tacoma manuals

Toyota Tacoma (2015-2018) Service Manual: Terminals Of Ecu

TERMINALS OF ECU

1. CLEARANCE WARNING ECU ASSEMBLY

(a) Disconnect the C30 connector from the clearance warning ECU assembly.

(a) Disconnect the C30 connector from the clearance warning ECU assembly.

(b) Measure the voltage and resistance according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

C30-9 (CLSW) - C30-30 (E)

Y - W-B

Back sonar or clearance sonar switch assembly power source signal

Ignition switch ON, back sonar or clearance sonar switch assembly on

11 to 14 V

C30-9 (CLSW) - C30-30 (E)

Y - W-B

Back sonar or clearance sonar switch assembly power source signal

Ignition switch ON, back sonar or clearance sonar switch assembly off

Below 1 V

C30-1 (IG) - C30-30 (E)

P - W-B

IG power source signal

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

C30-30 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the C30 connector to the clearance warning ECU assembly.

(d) Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

C30-22 (BOR) - C30-30 (E)

BE - W-B

Power source for rear sensor circuit

Ignition switch off

Below 1 V

Ignition switch ON, back sonar or clearance sonar switch assembly on

7.2 to 8.8 V

C30-13 (ER) - C30-30 (E)

R - W-B

Clearance warning buzzer signal

Buzzer sounding

Pulse generation

(See waveform 1)

C30-23 (E1) - C30-30 (E)

B - W-B

Ground for rear clearance sonar

Always

Below 1 V

C30-24 (SOR) - C30-30 (E)

V - W-B

Rear sensor communication signal (Rear clearance sonar sensor)

Ignition switch ON, back sonar or clearance sonar switch assembly on, shift lever in R

Pulse generation

(See waveform 2)

(e) Using an oscilloscope, check waveform 1.

(1) Waveform 1 (Reference)

Item

Content

Terminal No. (Symbol)

C30-13 (ER) - C30-30 (E)

Tool Setting

2 V/DIV., 500 μsec./DIV.

Vehicle Condition

When sonar detects obstacle (buzzer sounds)

Buzzer volume

M2 (Medium volume)

HINT:

The amplitude of the waveform changes according to the set volume.

(f) Using an oscilloscope, check waveform 2.

(1) Waveform 2 (Reference)

Item

Content

Terminal No. (Symbol)

C30-24 (SOR) - C30-30 (E)

Tool Setting

5 V/DIV., 1 msec./DIV.

Condition

Ignition switch ON, back sonar or clearance sonar switch assembly on, shift lever in R

HINT:

The waveforms for CH1 and CH2 are same.

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are lis ...

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION (a) When troubleshooting a vehicle with a diagnosis system, the only difference from the usual troubleshooting procedure is connecting the Techstream to the vehicle ...

Other materials:

Replacement
REPLACEMENT CAUTION / NOTICE / HINT CAUTION: Prolonged and repeated contact with engine oil will result in the removal of natural oils from the skin, leading to dryness, irritation and dermatitis. In addition, used engine oil contains potentially harmful contaminants which may ...

Transmitter ID1 Operation Stop (C2111/11-C2114/14)
DESCRIPTION The tire pressure warning valve and transmitters that are installed in the tire and wheel assemblies measure the tire pressure of each wheel. The measured values are transmitted to the tire pressure warning ECU and receiver in the vehicle as radio waves. The ECU compares the measu ...

A/C ECU Vehicle Information Reading/Writing Processor Malfunction (B15F5)
DESCRIPTION This DTC is stored when items controlled by the Air conditioning amplifier assembly cannot be customized via the navigation system vehicle customization screen. HINT: The Air conditioning amplifier assembly controls the air conditioning system related items that are customizable v ...

© 2011-2024 Copyright www.ttguide.net