STOP AND START SYSTEM FAIL-SAFE CHART

If any of the following DTCs are stored, the engine stop and start ECU enters fail-safe mode to preserve vehicle operability.

DTC

Component

Fail-safe Operation

Fail-safe Deactivation Condition

B22C0

Backup boost converter circuit

Stop and start control is prohibited

  • Pass condition detected and ignition switch turned to ON

  • DTCs (for overcurrent caused by audio volume setting) are cleared

P0335

Open in engine speed signal circuit

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

All of the following conditions are met for 10 seconds:

  • Normal communication with ECM

  • Engine speed 500 rpm or higher

  • Engine speed (communication signal) 500 rpm or higher

  • Difference between engine speed from pulse signal and engine speed from communication signal is less than 100 rpm

P0560

Open in VB circuit

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Pass condition detected and ignition switch turned to ON

P0562

  • Power source circuit

  • Low battery voltage

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Both of the following conditions are met for at 3 seconds or more while the engine is stopped by stop and start control and the generator is not generating electricity:

  • +B voltage 11.5 V or higher

  • Engine stopped

P0607

Engine stop and start ECU

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Pass condition detected and ignition switch turned to ON

P060A

Engine stop and start ECU

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Pass condition detected and ignition switch turned to ON

P060B

Analog to digital converter (Engine stop and start ECU)

  • Stop and start control is prohibited

  • Engine stalls

Pass condition detected and ignition switch turned to ON

P0617

ST NO. 1 relay circuit

Stop and start control is prohibited

Pass condition detected and DTCs are cleared

P062F

Engine stop and start ECU

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Number of starter operations and air conditioning information are registered correctly.

P0641

Engine stop and start ECU

  • Stop and start control is prohibited

  • Engine stalls

Pass condition detected and ignition switch turned to ON

P0942

Oil pump with motor assembly circuit

Stop and start control is prohibited

Pass condition detected and DTCs are cleared

P1538

P1539

Oil pump with motor assembly circuit

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Pass condition detected and ignition switch turned to ON

P1540

Vacuum sensor assembly circuit

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Sensor output is within standard range.

P1541

  • Vacuum sensor assembly

  • Brake booster assembly

  • Check valve to connector tube hose (brake booster hose)

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Either of the following conditions is met:

  • Vacuum changes while the brake pedal is depressed

  • Vacuum changes a specified number of times while the vehicle is being driven faster than a certain vehicle speed

P1545

  • Starter assembly

  • Starter circuit

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

  • DTCs and number of starter operations stored in the ECU (after replacing the starter) are cleared

  • Communication with ECM returns to normal and either of the following conditions (a) or (b) is met:

    1. The STA signal detected by the ECM and STA signal detected by the engine stop and start ECU are ON for 0.3 seconds and "Other than Tandem Starter" displayed for "Starter Type" in the Data List

    2. The STA signal detected by the ECM and STA signal detected by the engine stop and start ECU are ON for 5 seconds and "Other than Tandem Starter" displayed for "Starter Type" in the Data List.

P1589

G sensor zero point calibration incomplete

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Pass condition detected and ignition switch turned to ON

P1644

  • Starter drive circuit

  • ST NO. 1 relay

  • Engine stop and start ECU

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Voltage of engine stop and start ECU internal drive circuit for starter is correct when engine is idling and restarted

P1780

Park/neutral position switch assembly*1 Neutral position switch*2

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Pass condition detected and ignition switch turned to ON

P1862

  • Clutch start switch assembly (for lower)

  • Clutch start switch assembly (for upper)

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Clutch pedal switch assemblies (for upper and lower) remain off for 0.5 seconds or more.

P2531

Ignition switch circuit

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Both of the following conditions continue for at least 10 seconds:

  • Ignition switch ON

  • Normal communication with ECM

P323B

Backup boost converter circuit

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Pass condition detected and ignition switch turned to ON

U0100

CAN communication (ECM)

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Communication with engine stop and start ECU continues for 1.84 seconds

U0121

CAN communication (skid control ECU (brake actuator assembly))

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Communication with engine stop and start ECU continues for 4.44 seconds

U0126

CAN communication (spiral cable with sensor sub-assembly)

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Communication with engine stop and start ECU continues for 1.44 seconds

U0131

CAN communication (power steering ECU assembly)

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Communication with engine stop and start ECU continues for 1.6 seconds

U0140

CAN communication (main body ECU (multiplex network ECU))

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Communication with engine stop and start ECU continues for 7.2 seconds

U0151

CAN communication (airbag sensor assembly)

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Communication with engine stop and start ECU continues for 21.2 seconds

U0155

CAN communication (combination meter assembly)

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Communication with engine stop and start ECU continues for 21.2 seconds

U0164

CAN communication (air conditioning amplifier)

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Communication with engine stop and start ECU continues for 21.2 seconds

U1110

CAN communication (clearance warning ECU assembly)

  • Stop and start control is prohibited

  • Engine is automatically restarted if a DTC is stored while the engine is stopped by stop and start control

Communication with engine stop and start ECU continues for 21.2 seconds