Refer to Dtc P See page ES

HINT:

Diagnostic information output by the AID can be confirmed by connecting an oscilloscope to the diagnostic information terminal of the AID. Reading the waveform while performing the AIR system intrusive operation provided in the SYSTEM CHECK function, allows the possible trouble areas to be narrowed down.

(a) Start the engine and warm it up.

(b) Turn the ignition switch to OFF.

(c) Connect an intelligent tester to the DLC3.

(d) Connect oscilloscope probes to the AIDI and E1 terminals of the ECM.

(e) Turn the ignition switch to ON and turn the tester ON.

(f) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / AIR INJ CHECK / MANUAL OPERATION / AP: ON, ASV: OPEN and AP: OFF, ASV CLOSE.

HINT:

When MANUAL OPERATION is selected, the tester initialization (atmospheric pressure measurement) is performed automatically. The initialization takes 10 seconds. After the initialization, AP and ASV operation can be selected.

(g) Start the engine.

(h) Perform the AIR system intrusive operation while the engine is idling.

Intelligent Tester Display:

AIR INJ CHECK

MANUAL OPERATION

AIR PUMP

ON

ASV

OPEN

A/F BANK1

19.095

PRESSURE

17 kPa-g

PULSATION

25.39 kPa-g

AI STATUS

OK

Remaining Time 05 sec.

Press IEXITI to

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

1 1 1 1 Example: 80 '

j 1 1 1 1 %/o 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

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

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

• ECM

See waveform 5

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

-

Normal

Other than above

% duty)

• Open in AID ground circuit

1. Waveform 1

100 % Duty Ratio

2. Waveform 2

0 % Duty Ratio

3. Waveform 3

20 % Duty Ratio

4. Waveform 4

40 % Duty Ratio

5. Waveform 5

80 % Duty Ratio

HINT:

• By using an intelligent tester to perform the AIR INJ CHECK operation in the SYSTEM CHECK, the air-fuel ratio and the pressure in the secondary air injection system passage can be checked while the secondary air injection system is operating. This helps technicians to troubleshoot the system when it malfunctions.

• Read freeze frame data using an intelligent tester. Freeze frame data record the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data, from the time the malfunction occurred.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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