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:

Data List / Active Test
DATA LIST / ACTIVE TEST HINT: By accessing the Data List displayed on the Techstream, you can perform such functions as reading the values of switches and sensors without removing any parts. Reading the Data List is the first step of troubleshooting and is one method to shorten labor time. ...

Inspection
INSPECTION PROCEDURE 1. INSPECT FRONT SUSPENSION LOWER ARM (a) Flip the ball joint stud back and forth 5 times, as shown in the illustration, before installing the nut. (b) Using a torque wrench, turn the nut continuously at a rate of 2 to 4 seconds per turn and take the torque reading on ...

Interior
*1: If equipped * 2: Access Cab and Double Cab models *3: Vehicles with auto anti- glare inside rear view mirror *1: If equipped *2: Vehicles with an automatic transmission * : If equipped * 1: If equipped * 2: Vehicles with sub woofer ...

В© 2011-2019 Copyright www.ttguide.net