Toyota Corolla Cross: Restarting after a Short Period of Time from an Idling Stop

1.

STOP AND START SYSTEM OPERATION CHECK

Engine restarts

A

Engine does not restart

B

END (EXPLAIN TO THE CUSTOMER THAT THE PROBLEM COULD NOT BE REPRODUCED)

2.

CHECK VEHICLE CONDITIONS (DRIVER OPERATION)

GO TO STEP 4

3.

STOP AND START SYSTEM OPERATION CHECK (DRIVER OPERATION)

Engine does not restart

A

Engine restarts

B

END (EXPLAIN TO THE CUSTOMER THAT THE PROBLEM COULD NOT BE REPRODUCED)

4.

CHECK FOR DTC

DTCs are output

A

DTCs are not output

B

GO TO DTC CHART

5.

CHECK MULTI-INFORMATION DISPLAY

Displayed

A

Not displayed

B

GO TO STEP 7

6.

CHECK VEHICLE CONDITIONS (MULTI-INFORMATION DISPLAY)

In Preparation

• The brake pedal is strongly depressed further or pumped.

  (Drive the vehicle until a certain vacuum in the brake booster is restored and check that the stop and start system operates.)

Engine Start Request (Brake Negative Pressure Low)

"For Climate Control"

• The air conditioning system is being used.
• Front defroster is turned on.

Engine Start Request (A/C)

"Battery Charging"

• The auxiliary battery charge amount may be low.

  (As charging is prioritized over the stop and start system, the engine is restarted. Run the engine until auxiliary battery charging priority ends and check that the stop and start system operates.)

Engine Start Request (Battery Condition)

Stop & Start System Malfunction Visit Your Dealer

Stop & Start System may be malfunctioning

Engine Start Request (Detect DTC)

Engine does not restart

A

Engine restarts

B

END (EXPLAIN TO THE CUSTOMER THAT THE PROBLEM COULD NOT BE REPRODUCED)

GO TO STEP 7

7.

READ VALUE USING GTS (ENGINE START REQUEST)

Engine Start Request (Battery Condition)

Engine start request based on battery performance

A

Number of Engine Start Request (Battery Condition)

Engine Start Request (A/C)

Engine start request from Air conditioning system

B

Number of Engine Start Request (A/C)

Engine Start Request (Brake Release)

Engine start request due to brake pedal operation

C

Engine Start Request (Brake Negative Pressure Low)

Engine start request due to low brake booster vacuum

Number of Engine Start Request (Brake Negative Pressure Insufficient)

Engine Start Request (Accelerator)

Engine start request due to accelerator pedal operation

Number of Engine Start Request (Accelerator)

Engine Start Request (Shift Lever)

Engine start request due to shift lever operation

Engine Start Request (Shift Uncertain)

Engine start request due to uncertain shift lever position

Number of Engine Start Request (Shift Uncertain)

Engine Start Request (Shift P Position and Brake)

Number of engine start requests due to depressing the brake pedal while engine is stopped by stop and start control

Number of Engine Start Request (Brake ON(P range))

Number of Engine Start Request (Driver Door)

Engine start request by courtesy switch (for driver side) or driver side buckle switch

D

Number of Engine Start Request (Driver Side Buckle)

Engine Start Request (Courtesy SW or Buckle SW)

Engine Start Request (Cancel SW)

Engine start request by stop and start system cancel switch (eco run cancel switch assembly)

Number of Engine Start Request (Cancel SW)

Engine Start Request (IG Switch)

Engine start request by the ignition switch or engine switch

Number of Engine Start Request (IG Switch)

Engine Start Request (4WD and Rear Differential Lock)

Engine start request due to drive mode

E

Number of Engine Start Request (4WD and Rear Differential Lock)

Engine Start Request (ACC)

Engine start request from dynamic radar cruise control system

Number of Engine Start Request (ACC)

Engine Start Request (IPA)

Engine start request from Advanced Park

Number of Engine Start Request (IPA)

Engine Start Request (Welcab)

Engine start request from side lift up seat system

Number of Engine Start Request (Welcab)

Engine Start Request (Air Suspension)

Engine start request from air suspension system and side lift up seat system

Number of Engine Start Request (Air Suspension)

Engine Start Request (ABS Vehicle Speed)

Engine start request based on vehicle speed signal from the vehicle stability control system

Number of Engine Start Request (ABS Vehicle Speed)

Engine Start Request (ABS/VSC)

Engine start request from vehicle stability control system

Number of Engine Start Request (ABS/VSC)

Engine Start Request (ECM)

Engine start request from ECD system

Number of Engine Start Request (ECM)

Engine Start Request (AT/CVT)

Engine start request from automatic transmission system

Number of Engine Start Request (AT)

Engine Start Request (Detect DTC)

Engine start request due to output of DTCs

F

Number of Engine Start Request (Detect DTC)

GO TO STEP 9

GO TO STEP 10

GO TO STEP 11

GO TO STEP 12

GO TO STEP 13

8.

CHECK VEHICLE CONDITIONS (BATTERY)

• As charging is prioritized over the stop and start system, the engine is restarted. (Run the engine until auxiliary battery charging priority ends and check that the stop and start system operates.)
• Auxiliary battery (deteriorated)

• Data List / Battery Voltage

  (Standard: 11.8 V or less)

• Data List / Integrated Current (Integrated current value fluctuates 2376 A-sec or more when engine is stopped)
• Data List / Battery Fluid Temperature

  (Standard: -15°C (5°F) or lower, or 60 °C (140 °F) or higher)

• Data List / Integrated Current, Status of Battery Charge Control
  • -5544 A-sec or less: "Status of Battery Charge Control" is Charge Control Coordination Mode, Stop and Start Standalone Mode or Low Temperature Mode
  • -990 A-sec or less: "Status of Battery Charge Control" is Stop and Start Restriction Mode or Temperature High/Low Mode

GO TO STEP 14

9.

CHECK VEHICLE CONDITIONS (AIR CONDITIONING SYSTEM)

• Set the air conditioning system temperature to be approximately equivalent to the ambient temperature.
• Check that the A/C switch or defogger switch is not turned on during engine stop by stop and start control.
• Check that the stop and start operation conditions related to the air conditioning system are met.
• If engine start is requested even though all stop and start operation conditions related to the air conditioning system are met, inspect the following items:
  • - Air conditioning system

• Timer in the air conditioning amplifier assembly runs out
• Both of the following conditions are met:
  • Blower Switch: ON
  • Evaporator temperature exceeds threshold value (threshold value varies with temperature, humidity and amount of solar radiation)
• Any of the following conditions are met:
  • A/C switch, blower switch: ON
  • Defogger switch: OFF to ON
  • Blower switch turned off during auto control or blower mode changed to manual
  • Changes from stop and start system priority control to normal system control

GO TO STEP 14

10.

CHECK VEHICLE CONDITIONS (VEHICLE OPERATION)

When the engine is stopped by the stop and start system and an engine start request is generated even though the brake pedal is not depressed, inspect the following items:

• Stop Light switch assembly (ECM)
• Stop Light switch assembly (ABS/VSC)
• Master cylinder pressure sensor (brake control system)
• Airbag ECU assembly (G sensor)
• Stop light switch circuit

HINT:

Depending on the vehicle, the deceleration sensor may not be built into the airbag ECU assembly, but installed separately.

• Data List / Stop Light SW (ECM)

  (OFF: Brake pedal released)

• Data List / Stop Light SW (ABS/VSC)

  (OFF: Brake pedal released)

• Data List / Master Cylinder Pressure

  (Brake pedal released)

• Check that the brake pedal is not further depressed and the brake pedal is not excessively pumped.
• Drive the vehicle and wait for the vacuum in the brake booster to restore and check that the stop and start system operates.
• Brake booster vacuum insufficient
• Vacuum sensor assembly
• Brake booster assembly
• Master cylinder pressure sensor (brake control system)
• Engine stop and start ECU

Data List / Brake Boost Pressure

(Brake booster vacuum insufficient (Under 37.5 kPa (0.4 kg/cm2, 5 psi)) (Brake booster vacuum changes in accordance with brake fluid pressure (brake pedal effort))

When the engine is stopped by the stop and start system and an engine start request is generated even though the accelerator pedal is not depressed, inspect the following items:

• Accelerator pedal sensor
• ECM (or TCM)

Data List / Idle

(OFF: Accelerator pedal depressed)

When the engine is stopped by the stop and start system and an engine start request is generated even though the shift lever is not operated, inspect the following items:

• Shift lever assembly
• ECM (or TCM)

Data List/ Shift Position

(Other than D)

• Check that the shift lever is not between 2 positions.
• Shift lever assembly
• ECM (or TCM)
• Engine stop and start ECU

Data List / Shift Position

(Unset)

HINT:

Unset: When the shift lever is between 2 positions, 2 or more shift positions indicate ON.

When the engine is stopped by the stop and start system and an engine start request is generated even though the brake pedal is not depressed, inspect the following items:

• Shift lever assembly
• Stop light switch circuit
• ECM (or TCM)
• Engine stop and start ECU
• Skid control ECU (brake actuator assembly)

• Data List / Stop&Start of Engine State

  (Stop: Engine stopped (by stop and start control))

• Data List / Shift Position

  (P)

• Data List / Stop Light SW (ABS/VSC)

  (ON: Brake pedal depressed → OFF: Brake pedal released → ON: Brake pedal depressed)

• Data List / Stop Light SW (ECM)

  (ON: Brake pedal depressed → OFF: Brake pedal released → ON: Brake pedal depressed)

• Data List / Master Cylinder Pressure

  (40 kPa (0.4 kgf/cm2, 6 psi) or higher)

GO TO STEP 14

11.

CHECK VEHICLE CONDITIONS (DRIVER OPERATION)

When the engine is stopped by the stop and start system and an engine start request is generated even though the driver seat belt is not unfastened, the driver door or driver door lock is not operated, inspect the following items:

• Driver side seat belt buckle switch circuit (DTC U015587 (Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message)
• Front seat inner belt assembly (for driver side)
• Driver side door courtesy switch circuit (DTC U014087 (Lost communication with main body ECU (multiplex network body ECU))
• Driver door courtesy switch circuit

• Data List/ Driver Courtesy Switch Signal

  (ON: Driver side door open)

• The driver seat belt is unfastened.

When the engine is stopped by the stop and start system and an engine start request is generated even though the stop and start system cancel switch (eco run cancel switch assembly) is not pushed, inspect the following items:

• stop and start system cancel switch (eco run cancel switch assembly) circuit

Data List / Stop&Start Cancel Switch

(ON: Stop and start system cancel switch (eco run cancel switch assembly) pressed)

When the engine is stopped by the stop and start system and an engine start request is generated even though the ignition switch is not operated, inspect the following items:

• Certification ECU (smart key ECU assembly)*1
• Engine switch*1
• Ignition or starter switch assembly*2
• Engine stop and start ECU

• *1: w/ Smart Key System
• *2: w/o Smart Key System

Starter operating

• Data List / Starter

  (ON: Cranking)

GO TO STEP 14

12.

CHECK VEHICLE CONDITIONS (OTHER SYSTEMS)

When drive mode is not being operated but the respective Data List item indicates ON, inspect the following items:

• Rear differential lock
• Center differential lock
• Drive mode
• Snow mode

• Data List/ Rear Differential Lock Operation State

  (ON: Lock)

• Data List/ Center Differential Lock Operation State

  (ON: Lock)

• Other than COMFORT, ECO or NORMAL mode
• Snow mode on

When the preceding vehicle has not started off but the respective Data List item indicates ON, inspect the following items:

• Dynamic radar cruise control system
• Engine stop and start ECU

• When the dynamic radar cruise control (w/ full speed range following function) system is operating and the vehicle is stopped, the vehicle is restarted or the preceding vehicle starts off.
• When the condition is prohibited by radar cruise control

When the Advanced Park is not being operated but the respective Data List item indicates ON, inspect the following items:

• Advanced Park
• Engine stop and start ECU

Operation of the stop and start system is prohibited due to the Advanced Park.

When the air suspension system or side lift up seat system is not being operated but the respective Data List item indicates ON, inspect the following items:

• Side lift up seat system

Operation of the stop and start system is prohibited due to the side lift up seat system.

When the air suspension system or side lift up seat system is not being operated but the respective Data List item indicates ON, inspect the following items:

• Side lift up seat system
• Air suspension system

Operation of the stop and start system is prohibited due to the air suspension system.

When the engine is stopped by the stop and start system and an engine start request is generated even though the vehicle is not moving, inspect the following items:

• Wheel speed sensor
• Skid control ECU (brake actuator assembly)
• Engine stop and start ECU

Data List / Vehicle Speed

(More than 0 km/h (0 mph))

Check for vehicle stability control system DTCs.

• Skid control ECU (brake actuator assembly)

• Vehicle stability control system DTCs are output.
• Communication between the skid control ECU (brake actuator assembly) and engine stop and start ECU is abnormal.

• Check for ECD system DTCs.
• Check for continuously variable transaxle system DTCs.
• ECM (or TCM)

• Continuously variable transaxle system DTCs are output.
• ECD system DTCs are output.
• Powertrain / Transmission / Data List / A/T Oil Temperature 1

  (Standard: Less than 20°C (68°F) or 112°C (233.6°F) or higher)

• Powertrain / Engine / Data List / Engine coolant temperature

  Standard: 15°C (59°F) or higher and less than 105°C (221°F)

• Check for ECD system DTCs.
• Check for continuously variable transaxle system DTCs.
• Confirm the continuously variable transaxle fluid temperature.
• Oil pump with motor assembly
• ECM (or TCM)

• Continuously variable transaxle system DTCs are output.
• ECD system DTCs are output.
• Powertrain / Transmission / Data List / A/T Oil Temperature 1

  (Standard: Less than 20°C (68°F) or 112°C (233.6°F) or higher

GO TO STEP 14

13.

CHECK VEHICLE CONDITIONS (SYSTEM MALFUNCTIONS)

• Check for stop and start system DTCs.
• Backup boost converter circuit
• Engine stop and start ECU

• Stop and start system DTCs are output.

  HINT:

  Troubleshoot the vehicle in accordance with each output DTC.

  

14.

STOP AND START SYSTEM OPERATION CHECK

Engine restarts

A

Engine does not restart

B

CHECK NEXT ENGINE START REQUEST

(a) Go to the next engine start request item.

END (Explain to the customer that the problem could not be reproduced)