Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

The diagnostic information output from the Air Injection Control Driver (AID) can be confirmed by connecting an oscilloscope to the diagnostic information terminal of the AID. A trouble area search can be narrowed by reading the waveform on the oscilloscope when performing the AI system intrusive operation function provided in the SYSTEM CHECK.

Start the engine and warm it up.
Turn the ignition switch OFF.
Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
Connect an oscilloscope probe to the AIDI terminal of the ECM.

Fig 1: Identifying ECM Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Start the engine and turn the tester ON.
On the tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / AIR INJ SYSTEM.
On the tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / AIR INJ CHECK / MANUAL / OPERATION 1 and 2.

Fig 2: Intelligent Tester Display - AIR INJ CHECK
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

OPERATION 1: AP: OFF; EASV: CLOSE; ASV1: CLOSE; ASV2: OFF

OPERATION 2: AP: ON; EASV: OPEN; ASV1: OPEN; ASV2: OPEN
Monitor the voltage output of the AID (duty ratio signal).

Fig 3: Identifying Blinking Pattern

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Oscilloscope range

ITEM CHART

Item	Content
Terminal	CH1:AIDI-E1
Equipment Setting	5 V/DIV., 20 to 40 msec./DIV.
Condition	Idling

NOTE:

This AIR INJECTION CHECK only allows technicians to operate the AI system for 5 seconds. Furthermore, the check can be performed 4 times a trip. If the test is repeated, intervals of at least 30 seconds are required between checks.
While the AI system operation using the intelligent tester is prohibited, the tester displays the prohibition (WAIT or ERROR). If ERROR (AI STATUS NG) is displayed on the tester, stop the engine for 10 minutes and then try again.
Performing the AIR INJ CHECK over and over again may cause damage in the secondary air injection system. If necessary, wait several minutes between tests to prevent overheating the system.
When performing the AIR INJ CHECK operation after the battery cable has been reconnected, wait for 7 minutes with the ignition switch turned ON or the engine running.
Turn the ignition switch OFF when the AIR INJ CHECK operation finishes.

SUSPECTED TROUBLE AREA CHART

AID Diagnostic Signal Waveform	ECM Command	DTC (ECM Output)	Suspected Trouble Area
100% Duty Ratio See 1waveform 1	Any Air Injection (AI) System operation	P1613	Open in diagnostic signal circuit Air Injection Control Driver (AID) Open in AID +B circuit (AID power source) Short between +B circuit and diagnostic signal circuit
0% Duty Ratio See 2waveform 2	AI 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 AID ECM
0% Duty Ratio See 2waveform 2	AI System: OFF (Air pump OFF, ASV OFF)	-	Normal
20% Duty Ratio See 3waveform 3	Air Pump: ON	P0418	Short between air pump drive circuit and body ground Harness & connector (AID -Pump) Air Pump AID ECM
20% Duty Ratio See 3waveform 3	Air Pump: OFF	P0418	Open in air pump drive circuit (AID - Pump), or short between air pump drive circuit and +B Harness & connector (AID -Pump) Air Pump AID ECM
40% Duty Ratio See 4waveform 4	ASV: ON	P0412	Short between ASV drive circuit and body ground Harness & connector (AID -ASV) ASV AID ECM
40% Duty Ratio See 4waveform 4	ASV: OFF	P0412	Open in ASV drive circuit (AID - ASV), or short between ASV drive circuit and +B Harness & connector (AID -ASV) AID ASV ECM
80% Duty Ratio See 5waveform 5	AI System: OFF (Air pump OFF, ASV OFF)	P1613	AID ECM
80% Duty Ratio See 5waveform 5	AI System: ON (Air pump ON, ASV ON)	-	Normal
Excluding Above (excluding 0, 20, 40, 80,100% duty)	-	P1613	AID Open in AID ground circuit

Waveform 1
100% Duty Ratio

Fig 4: Identifying Waveform 1
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Waveform 2
0% Duty Ratio

Fig 5: Identifying Waveform 2
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Waveform 3
20% Duty Ratio

Fig 6: Identifying Waveform 3
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Waveform 4
40% Duty Ratio

Fig 7: Identifying Waveform 4
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Waveform 5
80% Duty Ratio

Fig 8: Identifying Waveform 5
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

Using the AIR IN J CHECK operation of the SYSTEM CHECK provided in the intelligent tester function, conditions for air fuel ratio and pressure in the secondary air injection system passage can be checked while the secondary air injection system is operating. It helps technicians to troubleshoot the system when it is malfunctioning.
Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions 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.

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1613)

Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
Turn the ignition switch ON and turn the tester ON.
Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
Read DTCs.

Result

RESULT CHART

Display (DTC Output)	Proceed to
P1613	A
P1613 and other DTCs	B

HINT:

If any DTCs other than P1613 are output, troubleshoot those DTCs first.

B: GO TO DTC CHART

A: GO TO Next Step

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (AIDI VOLTAGE)

Start the engine and warm it up.
Turn the ignition switch OFF.
Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
Turn the ignition switch ON and turn the tester ON.
Start the engine.
Enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / AIR INJ CHECK / AUTOMATIC.

Fig 9: Identifying E9 Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NOTE:
- When performing the AIR INJ CHECK operation after the battery cable has been reconnected, wait for 7 minutes with the ignition switch turned ON or the engine running.
- Turn the ignition switch OFF when the AIR INJ CHECK operation finishes.
Measure voltage between terminal E9-13 (AIDI) of the ECM connector and body ground when the air injection system is ON and OFF.

Result

RESULT CHART

Results	Suspected Trouble Areas	Proceed to
Fixed at Low (1.6 V or less) even when AI system ON (Air pump ON, ASV ON)	Short between air pump or air switching valve command signal circuit and body ground Open in air pump command signal circuit (between ECM and AID) Open in ASV command signal circuit (between ECM and AID) Open in AID ground circuit (between AID and body ground) Diagnostic signal circuit ground short AID ECM	A
Fixed at High (12 V or more) even when AI system OFF (Air pump OFF, ASV OFF)	Open in diagnostic signal circuit (ECM - AID) Short between +B circuit and diagnostic signal circuit (ECM-AID) Open in AID power source circuit AID ECM	B
Other than above: Fluctuating (duty signal excluding 20, 40, 80%)	AID Open in AID ground circuit (between AID and body ground)	C

B: GO TO step 5

C: GO TO step 8

A: GO TO Next Step

INSPECT ECM (AIRP AND AIRV VOLTAGE)

Turn the ignition switch ON.
Measure voltage between terminal E9-25 (AIRP), E9-4 (AIRV) of the ECM connector and body ground.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
E9-25 (AIRP) - Body ground	10 V or more
E9-4 (AIRV) - Body ground	10 V or more

NG: REPLACE ECM

Fig 10: Inspecting ECM (AIRP And AIRV Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO Next Step

CHECK HARNESS AND CONNECTOR (ECM - AIR INJECTION CONTROL DRIVER, AIR INJECTION CONTROL DRIVER - BODY GROUND)
1. Check harness and connector (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE AIR INJECTION CONTROL DRIVER

CHECK POWER SOURCE OF AIR INJECTION CONTROL DRIVER

Disconnect the A53 Air Injection Control Driver (AID) connector.
Turn the ignition switch ON.
Measure the voltage between the terminal +B (A53-5) and E (A53-1) of the AID connector.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
A53-5 (+B) - A53-1 (E)	10 V or more

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 11: Checking Power Source Of Air Injection Control Driver

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO Next Step

INSPECT AIR INJECTION CONTROL DRIVER (Dl TERMINAL VOLTAGE)

Disconnect the A53 AID connector.
Turn the ignition switch ON.

Measure the voltage between the terminal A53-2 (Dl) of the AID connector and body ground.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
A53-2 (Dl) - Body ground	10 V or more

Reconnect the AID connector.

OK: REPLACE AIR INJECTION CONTROL DRIVER

Fig 12: Inspecting Air Injection Control Driver (DI Terminal Voltage)

NG: GO TO Next Step

CHECK HARNESS AND CONNECTOR (ECM - AIR INJECTION CONTROL DRIVER)
1. Check harness and connector (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE ECM

CHECK HARNESS AND CONNECTOR (AIR INJECTION DRIVER - BODY GROUND)

Disconnect the A53 AID connector.

Measure the resistance between the terminal E (A53-1) of the AID connector and body ground.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
A53-1 (t) - Body ground	Below 1 Ω

Reconnect the AID connector.

Fig 13: Checking Harness And Connector (Air Injection Driver - Body Ground)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO Next Step

REPLACE AIR INJECTION CONTROL DRIVER
1. Replace the AID (see REMOVAL ).
CHECK WHETHER DTC OUTPUT RECURS (DTC P1613)
1. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
2. Turn the ignition switch ON and turn the tester ON.
3. Clear the DTCs (see DTC CHECK / CLEAR ).
4. Start the engine.
5. Perform ACTIVE TEST to operate the air injection system.
  Enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / AIR INJ CHECK / AUTOMATIC.
6. After operating the secondary air injection system, confirm the pending codes of the secondary air injection system by entering the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / PENDING CODES.
NOTE:
- When performing the AIR INJ CHECK operation after the battery cable has been reconnected, wait for 7 minutes with the ignition switch turned ON or the engine running.
- Turn the ignition switch OFF when the AIR INJ CHECK operation finishes.
OK: DTC P1613 for the secondary air injection system is not output.

NG: GO TO DTC CHART

OK: END