Smart Access System (Keyless Start) (Diagnostic Codes & Circuit Tests): Overview Lexus LX J200 рестайлинг

DESCRIPTION

This DTC is stored when the IG output circuits inside the main body ECU are open or shorted.

Scheme 52

This DTC is stored when a malfunction occurs in the IG1D output circuit, which is between the IG1 No. 3 relay actuation circuit inside the main body ECU and the IG1 No. 3 relay.

Scheme 53

This DTC is stored when a malfunction occurs in the IG2D output circuit, which is between the integration relay (IG2 relay) actuation circuit inside the main body ECU and the integration relay (IG2 relay).

Scheme 54

This DTC is stored when a malfunction occurs in the ACCD output circuit, which is between the ACC relay actuation circuit inside the main body ECU and the ACC relay.

Scheme 55

This DTC is stored when the engine start request signal circuit inside the main body ECU is open or shorted.

Scheme 56

This DTC is stored when a malfunction is detected in the ACCR signal output by the main body ECU.

Scheme 57

This DTC is stored when the submersion circuit monitor inside the main body ECU detects that the vehicle has been submerged in water.

This DTC is stored when: 1) a malfunction is detected between the main body ECU and the engine switch; or 2) either of the switches inside the engine switch is malfunctioning.

Scheme 58

This DTC is stored when there is an abnormal circuit between the main body ECU and the shift lock control ECU.

Scheme 59

The main body ECU and the combination meter are connected with a cable and the CAN communication line. DTC B2282 is stored when signals, transmitted through the cable and communication line, do not match.

The skid control ECU converts signals from the speed sensor into 4-pulse signals and sends them to the combination meter. After these signals are converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, they are then transmitted to the main body ECU. The main body ECU determines the vehicle speed based on the frequencies of these pulse signals.

Scheme 60

Scheme 61

This DTC is stored when there is an inconsistency between the circuit between the main body ECU and stop light switch, and the CAN communication signal between the main body ECU and ECM.

Scheme 62

The main body ECU and the steering lock ECU are connected by a cable and the LIN communication line. These DTCs are stored when: 1) signals, transmitted through the cable and the communication line, do not match; or 2) a malfunction is detected in the circuit between the main body ECU and the steering lock ECU.

Scheme 63

The main body ECU and ECM are connected by a cable and the CAN communication line. If the cable information and CAN information are inconsistent, this DTC is stored.

Scheme 64

This DTC is stored when there is a LIN communication problem between the main body ECU and certification ECU (smart key ECU assembly) or when there is a problem in the engine immobilizer system.

Scheme 65

When the certification ECU (smart key ECU assembly) has detected the key inside the cabin before the brake pedal is depressed, the power source mode can be changed in the following order sequentially by pressing the engine switch: off --> on (ACC) --> on (IG) --> off.

When one of the DTCs shown in the illustration below is detected, troubleshoot the DTC(s) by following the troubleshooting procedure relevant to the DTC(s). If the power source mode still cannot be changed normally, despite troubleshooting, one of the following may have occurred

1. The LIN communication line is malfunctioning.
2. The certification ECU (smart key ECU assembly) has determined that no key is inside the cabin.
3. The engine switch is malfunctioning.
4. The main body ECU is malfunctioning.

Scheme 66

Scheme 67

The engine switch condition (power source mode) or system malfunctions can be checked by observing the status of the engine switch indicator light.

ENGINE SWITCH INDICATOR LIGHT CONDITION

Scheme 68

See also:
• REMOVAL [01/2012 - ]