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

  • After returning to the normal state, turn the ignition switch to ON again.

  • After clearing DTCs (for overcurrent caused by audio volume setting).

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 continue 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

After returning to the normal state, turn the ignition switch to ON again.

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 continue for at least 3 seconds while the engine is stopped by stop and start control and the generator is not generating electricity:

  • +B voltage 11.5 V or higher

  • AM21 voltage 3.5 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

After returning to the normal state, turn the ignition switch to ON again.

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

After returning to the normal state, turn the ignition switch to ON again.

P060B

Analog to digital converter (Engine stop and start ECU)

  • Stop and start control is prohibited

  • Engine stalls

After returning to the normal state, turn the ignition switch to ON again.

P0617

ST NO. 1 relay circuit

Stop and start control is prohibited

After returning to the normal state and clearing DTCs.

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

After returning to the normal state, turn the ignition switch to ON again.

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

  • There is a specified number of times that vacuum changes 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

  • After clearing the number of starter operations stored in the ECU (after replacing the starter) and DTCs.

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

    1. STA signal is ON at the ECD or SFI system and STA signal is ON at the stop and start system (remains ON for 0.3 seconds).

    2. STA signal is OFF at the ECD or SFI system and STA signal is OFF at the stop and start system (remains OFF for 5 seconds or more).

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

After returning to the normal state, turn the ignition switch to ON again.

P1644

  • Starter drive circuit

  • ST NO. 1 relay

  • Engine stop and start ECU (STA 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

The voltage conditions in the ECU internal drive circuit for starter are correctly recognized when the engine is idling and restarted.

P1780

Neutral position switch

  • 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

After returning to the normal state, turn the ignition switch to ON again.

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

After returning to the normal state, turn the ignition switch to ON again.

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 1.6 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

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