Toyota CH-R Service Manual: Acceleration Sensor Malfunction (P1586)

Toyota CH-R Service Manual / K114 Cvt / Continuously Variable Transaxle System / Acceleration Sensor Malfunction (P1586)

DESCRIPTION

The ECM determines the vehicle inclination based on a signal from the airbag sensor assembly (yaw rate and acceleration sensor). If a malfunction of the airbag sensor assembly (yaw rate and acceleration sensor) is determined based on a malfunction signal from the skid control ECU (brake actuator assembly), the ECM stores this DTC.

HINT:

  • The airbag sensor assembly (yaw rate and acceleration sensor) signal is sent to the skid control ECU (brake actuator assembly) via CAN communication.
  • If CAN communication DTCs are output, perform troubleshooting for those DTCs first.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P1586

Acceleration Sensor Malfunction

After the ignition switch is turned ON, the skid control ECU (brake actuator assembly) has detected either one of the following conditions, and the ECM has received a diagnostic signal from the skid control ECU (brake actuator assembly) for 3 seconds or more (1 trip detection logic).

  • While the vehicle is driven at 30 km/h (19 mph) or more, the difference between the calculated longitudinal G value based on the airbag sensor assembly (yaw rate and acceleration sensor) (G sensor) and the value based the vehicle speed exceeds 0.35 G for 60 seconds or more.
  • Airbag sensor assembly (yaw rate and acceleration sensor) signal does not change 16 times or more while the vehicle speed decreases from 30 km/h (19 mph) to 0 km/h (0 mph).
  • Airbag sensor assembly (Yaw rate and acceleration sensor)
  • Brake actuator assembly (Skid control ECU)
  • CAN communication system

Does not come on

DTC stored

DTC Detection Condition Patterns:
 

Vehicle Condition

Pattern 1

Pattern 2

Diagnostic Condition

The ignition switch is ON.

Malfunction Condition

At a vehicle speed 30 km/h (19 mph) or more, the difference between longitudinal G calculated based on the airbag sensor assembly (yaw rate and acceleration sensor) (G sensor) value and longitudinal G calculated based on the vehicle speed exceeds 0.35 G for 60 seconds or more.

-

The airbag sensor assembly (yaw rate and acceleration sensor) signal does not change 16 times or more while the vehicle speed decreases from 30 km/h (19 mph) to 0 km/h (0 mph).

-

Duration

3 seconds or more

3 seconds or more

Detection Logic

1 trip detection logic

1 trip detection logic

HINT:

This DTC is output when either of the above detection patterns is met.

WIRING DIAGRAM

Refer to DTC P1585

Click here

CAUTION / NOTICE / HINT

NOTICE:

  • Perform initialization after replacing any parts related to the continuously variable transaxle system.

    Click here

  • Check that no DTCs are stored after performing initialization.

    Click here

HINT:

After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

  1. Drive the vehicle at 30 km/h (19 mph) or more for 60 seconds or more.
  2. While driving at 30 km/h (19 mph), depress the brake pedal 16 times or more until the vehicle is stopped.
  3. Check for DTCs again.

    Click here

PROCEDURE

1.

CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Check for DTCs.

Powertrain > Engine and ECT > Trouble Codes

Result

Proceed to

DTC U0129 is not output

A

DTC U0129 is output

B

B

GO TO CAN COMMUNICATION SYSTEM

A

2.

CHECK DTC OUTPUT (IN ADDITION TO DTC P1586)

(a) Connect the Techstream to the DLC3.

(b) Turn the Techstream on.

(c) Turn the ignition switch to ON.

(d) Clear the DTCs.

Click here

Powertrain > Engine and ECT > Clear DTCs

(e) Perform a road test where the vehicle is driven at 30 km/h (18 mph) or more, the brakes are applied at least 16 times and the vehicle is finally stopped.

(f) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Powertrain > Engine and ECT > Trouble Codes

(g) Read the DTCs using the Techstream.

HINT:

If any DTCs other than P1586 are output, perform troubleshooting for those DTCs first.

Result

Proceed to

Only DTC P1586 is output

A

DTC P1586 and other DTCs are output

B

B

GO TO DTC CHART

A

3.

READ VALUE USING TECHSTREAM (G SENSOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / Data List.

Powertrain > Engine and ECT > Data List

Tester Display

G Sensor

(e) In accordance with the display on the Techstream, read the Data List.

Powertrain > Engine and ECT > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

G Sensor

Converted output voltage of yaw rate and acceleration sensor

Min.: 0 V

Max.: 79.998 V

Displays converted voltage of yaw rate and acceleration sensor

  • 2.31 V to 2.69 V: Vehicle on level ground
  • 1.88 V to 2.5 V: Decelerating
  • 2.5 V to 3.11 V: Accelerating
  • Set to 1.87 V: G sensor malfunction
  • Set to 1.87 V: Communication malfunction

-

Result

Proceed to

Data display is not within Normal Condition range

A

Data display is within Normal Condition range

B

B

REPLACE BRAKE ACTUATOR ASSEMBLY

A

4.

REPLACE AIRBAG SENSOR ASSEMBLY

(a) Replace the airbag sensor assembly (yaw rate and acceleration sensor).

Click here

NEXT

PERFORM INITIALIZATION

    Acceleration Sensor Circuit (P1585)
    DESCRIPTION The ECM determines the vehicle inclination based on a signal from the airbag sensor assembly (yaw rate and acceleration sensor). If a malfunction in the airbag sensor assembly (yaw ra ...

    Pressure Control Solenoid "K" Electrical (P282B)
    DESCRIPTION According to current control by the ECM, the shift solenoid valve SLS controls secondary pulley pressure and belt clamping pressure in accordance with the input shaft torque. ...

    Other materials:

    Toyota CH-R Service Manual > Vehicle Stability Control System: System Diagram
    SYSTEM DIAGRAM Transmitting ECU (Transmitter) Receiving ECU Signal Communication Method Skid control ECU (brake actuator assembly) Steering angle sensor Steering angle sensor request signal CAN ...

    Toyota CH-R Service Manual > Airbag System: System Diagram
    SYSTEM DIAGRAM Communication Table Transmitting ECU (Transmitter) Receiving ECU Signal Communication Method Airbag Sensor Assembly ECM Crash detection signal CAN ...

    © 2017-2019 Copyright www.tochr.net
    0.0168