Es

(i) Monitor the AID voltage output (duty ratio signal).

% Duty Signal

5 V/DIV

^GND

Oscilloscope range

Items

Contents

Terminals

CHI: AIDI - E1

Equipment Settings

5 V/Division, 20 to 50 ms/Division

Conditions

Idling

(j) Turn the ignition switch to OFF.

NOTICE:

• This AIR INJECTION CHECK only allows technicians to operate the AIR system for a maximum of 5 seconds. Furthermore, the check can only be performed up to 4 times per trip. If the test is repeated, intervals of at least 30 seconds are required between checks. While AIR system operation using the intelligent tester is prohibited, the tester display indicates the prohibition (WAIT or ERROR).

If an ERROR as shown in the illustration is displayed on the tester during the test, stop the engine for 10 minutes, and then try again.

• Performing the AIR INJ CHECK repetitively may cause damage to the AIR system. If necessary, leave an interval of several minutes between SYSTEM CHECK operations to prevent the system from overheating.

• When performing the AIR INJ CHECK operation after the battery cable has been reconnected, wait for 7 minutes with the ignition switch turned to ON or the engine running.

• Turn the ignition switch to OFF when the AIR INJ CHECK operation finishes.

AID Diagnostic Signal Waveforms

ECM Commands

DTCs (ECM Output)

Suspected Trouble Areas

100 % Duty Ratio See waveform 1

Any Air Injection (AIR) System operation

P1613

• Open in diagnostic signal circuit

• Air Injection Control Driver (AID)

• Open in AID+B circuit (AID power source)

• Short between +B and diagnostic signal circuits

0 % Duty Ratio See waveform 2

AIR System: ON (Air pump ON, ASV ON)

P1613

• Open or short in air pump or Air Switching Valve (ASV) command signal circuit (ECM-AID)

• Open in AID ground circuit

• Short between diagnostic signal circuit and body ground

• ECM

AIR System: OFF (Air pump OFF, ASV OFF)

-

Normal

20 % Duty Ratio See waveform 3

Air Pump: ON

P0418

Short between air pump drive circuit and body ground

• Harness and connector (AID-Pump)

• ECM

Air Pump: OFF

P0418

Open in air pump drive circuit (AID-Pump), or short between air pump drive circuit and +B

• Harness and connector (AID-Pump)

• ECM

AID Diagnostic Signal Waveforms

ECM Commands

DTCs (ECM Output)

Suspected Trouble Areas

40 % Duty Ratio See waveform 4

ASV: ON

P0412

Short between ASV drive circuit and body ground

• Harness and connector (AID-ASV)

• ECM

ASV: OFF

P0412

Open in ASV drive circuit (AID-ASV), or short between ASV drive circuit and +B

• Harness and connector (AID-ASV)

• ECM

80 % Duty Ratio See waveform 5

AIR System: OFF (Air pump OFF, ASV OFF)

• ECM

AIR System: ON (Air pump ON, ASV ON)

-

Normal

Other than above

% duty)

• Open in AID ground circuit

Almost Same as Battery Voltage - +B

> A112066E01

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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