Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Radar Cruise Control Presence Determination Malfunction (Engine / HV) (C1A52)

Toyota Tacoma 2015-2018 Service Manual / Cruise Control / Dynamic Radar Cruise Control System(for 2gr-fks) / Radar Cruise Control Presence Determination Malfunction (Engine / HV) (C1A52)

DESCRIPTION

DTC C1A52 is stored when the ECM cannot recognize the millimeter wave radar sensor assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

C1A52

Radar Cruise Control Presence Determination Malfunction (Engine / HV)

Approximately 17 seconds after the ignition switch is turned to ON, the ECM cannot recognize the millimeter wave radar sensor assembly for approximately 1.3 seconds or more.

  • ECM
  • Millimeter wave radar sensor assembly

Does not come on

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle. As a result, a DTC may be stored.
  • When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed.

    Click here

  • Before replacing the ECM, refer to Registration.

    w/o Smart Key System: Click here w/ Smart Key System: Click here

    w/ Smart Key System: Click here

PROCEDURE

1.

CHECK FOR DTC (RADAR CRUISE 2)

(a) Clear the DTCs.

Click here (b) Make sure that the DTC detection conditions are met.

(b) Make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the system cannot detect the malfunction.

  1. Turn the ignition switch to ON.
  2. Wait for 20 seconds or more.

(c) Check for DTCs.

Click here

Result

Proceed to

DTC C1A52 is not output

A

DTC C1A52 is output

B

A

USE SIMULATION METHOD TO CHECK

B

2.

REPLACE ECM

(a) Replace the ECM.

Click here

NEXT

3.

CHECK FOR DTC (RADAR CRUISE 2)

(a) Clear the DTCs.

Click here (b) Make sure that the DTC detection conditions are met.

(b) Make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the system cannot detect the malfunction.

  1. Turn the ignition switch to ON.
  2. Wait for 20 seconds or more.

(c) Check for DTCs.

Click here

Result

Proceed to

DTC C1A52 is not output

A

DTC C1A52 is output

B

A

END (ECM WAS DEFECTIVE)

B

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

Skid Control Buzzer Circuit (C1A4A)
DESCRIPTION Based on dynamic radar cruise control system operation, the forward recognition camera provides warnings to the driver by sounding the skid control buzzer. DTC C1A4A is stored when a m ...

Brake Switch "A" Circuit Open (P057113)
DESCRIPTION When the brakes are applied by the dynamic radar cruise control system, the skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 operates the ...

Other materials:

Front Speed Sensor RH Performance (C1409,C1410)
DESCRIPTION Refer to DTCs C1401 and C1402 (See page ). DTC Code DTC Detection Condition Trouble Area C1409 C1410 One of the following conditions is met: When the vehicle is driven in reverse at a speed of 3 km/h (2 ...

Microphone Circuit between Microphone and Radio Receiver
DESCRIPTION The radio and display receiver assembly and telephone microphone assembly are connected to each other using the microphone connection detection signal lines. Using this circuit, the radio and display receiver assembly sends power to the telephone microphone assembly, and the teleph ...

Installation
INSTALLATION CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH side and LH side. The following procedure is for the LH side. When installing a new front fender wheel opening moulding or quarter panel wheel opening moulding, heat the vehicle body and front fender ...

В© 2011-2020 Copyright www.ttguide.net