Sfi System - P1613

Brand:

Toyota

Model Name:

4Runner GRN210 215 UZN210 215

Manual:

Repair Manual

Section:

2Uz-Fe Engine Control System

Title:

Sfi System

  1. Description

  2. Monitor description

  3. Monitor strategy

  4. Typical enabling conditions

  5. Typical malfunction thresholds

  6. Component operating range

  7. Wiring diagram

  8. Inspection procedure

  9. Check any other dtcs output (in addition to dtc p1613)

  10. Perform active test by intelligent tester (aidi voltage)

  11. Inspect ecm (airp and airv voltage)

  12. Check harness and connector (ecm - air injection control driver, air injection control driver - body ground)

  13. Check power source of air injection control driver

  14. Inspect air injection control driver (di terminal voltage)

  15. Check harness and connector (ecm - air injection control driver)

  16. Check harness and connector (air injection driver - body ground)

  17. Replace air injection control driver

  18. Check whether dtc output recurs (dtc p1613)

DTC P1613 Secondary Air Injection Driver Malfunction


​

DESCRIPTION

Refer to DTC P0412 (Click here).

DTC No.
DTC Detection Condition
Trouble Area
P1613
Either of following condition (a) or (b) is met:
  1. (a) Both of following conditions are met (1 trip detection logic):
    1. While either of air pump or air switching valve does not operate
    2. Air injection control driver outputs normal signal (80 % duty signal)
  1. (b) Following condition is met (1 trip detection logic):
    1. Air injection control driver outputs abnormal duty signal (duty signal excluding 0, 20, 40, 60, 80, 100 %)
  1. Air injection control driver (AID)
  2. Open in air injection control driver ground circuit
P1613
Both of following conditions are met (1 trip detection logic):
  1. (a) While air injection system operating (Air pump ON and all ASV ON)
  2. (b) Air injection control driver outputs air pump malfunction signal (0 % duty signal)
  1. Short in diagnostic information signal circuit (AID - ECM)
  2. Open or short in air pump and air switching valve command signal circuit (AID - ECM)
  3. Air injection control driver (AID)
  4. Open in air injection control driver ground circuit
  5. ECM
P1613
Air injection control driver outputs abnormal duty signal (100 % duty signal) (1 trip detection logic)
  1. Open or short in AID power source circuit
  2. Open in diagnostic information signal circuit (AID - ECM)
  3. Air injection control driver (AID)
  4. ECM

MONITOR DESCRIPTION

When the air injection system operation is required while the engine is warming up, the ECM transmits command signals to the Air Injection Control Driver (AID) to drive the air pump and Air Switching Valve (ASV).
AID detects an open and short in the air pump and air switching valve circuit according to the terminal voltage and sends a signal as the diagnostic information to the ECM.
If the air injection system drive circuit or the AID itself has a malfunction, the AID sends a malfunction signal (duty signal) as a diagnostic information signal to the ECM (when the system is normal, a system normal signal is sent).
The ECM sets the DTC based on the diagnostic information from the AID.
Example:
  1. The duty ratio of the diagnostic information signal output from AID is 0 or 100 % (remains at 0 V or battery voltage).
  2. The duty ratio of the diagnostic signal from the AID shows an impossible ratio (other than 0, 20, 40, 60, 80, 100 %).
  3. The AID outputs the normal signal (normal duty signal: 80 %) while the system is not operating.

MONITOR STRATEGY


Related DTCs
P1613: Secondary air injection system control module range check
Required sensors/components
Air injection control driver
Frequency of operation
Continuous
Duration
3 seconds
MIL operation
Immediate
Sequence operation
None

TYPICAL ENABLING CONDITIONS


All:
The monitor will run whenever these DTCs are not present
None

Case 1:
Battery voltage
8 V or more
Ignition switch
ON
Starter
OFF

Case 2:
Either of following conditions is met
Condition 1 or 2
1. Air pump
Not operating
2. Air switching valve
Not operating
Battery voltage
8 V or more
Ignition switch
ON
Starter
OFF

Case 3:
Air pump
Operating
Air switching valve
Operating
Battery voltage
8 V or more
Ignition switch
ON
Starter
OFF

Case 4:
Battery voltage
8 V or more
Ignition switch
ON
Starter
OFF

TYPICAL MALFUNCTION THRESHOLDS


Case 1:
One of the following conditions is met
Condition 1, 2, 3 or 4
1. Diagnostic signal duty ratio from air injection control driver
1 to 10 %
2. Diagnostic signal duty ratio from air injection control driver
30 %
3. Diagnostic signal duty ratio from air injection control driver
49 %
4. Diagnostic signal duty ratio from air injection control driver
91 to 99 %

Case 2:
Diagnostic signal duty ratio from air injection control driver
70 to 90 %

Case 3:
Diagnostic signal duty ratio from air injection control driver
0 %

Case 4:
Diagnostic signal duty ratio from air injection control driver
100 %

COMPONENT OPERATING RANGE


Diagnostic signal duty ratio from air injection control driver
70 to 90 % when secondary air injection system is operating
and
0 % when secondary air injection system is not operating

WIRING DIAGRAM

Refer to DTC P0412 (Click here).

INSPECTION PROCEDURE

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 AIR system intrusive operation function provided in the SYSTEM CHECK.
  1. Start the engine and warm it up.
  2. Turn the ignition switch OFF.
  3. Connect the intelligent tester to the DLC3 with CAN VIM.
  4. Start the engine and turn the tester ON. 4Runner
    Connect an oscilloscope probe to the AIDI terminal of the ECM.
  5. Start the engine and turn the tester ON.
  6. On the tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / AIR INJ SYSTEM.
  7. Monitor the voltage output of the AID (duty ratio signal).Oscilloscope range ItemContentTerminalCH1: AIDI - E1Equipment Setting5 V/DIV., 20 to 40 msec./DIV.ConditionIdlingNOTICE: This AIR INJECTION CHECK only allows technicians to operate the AIR 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 AIR 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.AID Diagnostic Signal WaveformECM CommandDTC(ECM Output)Suspected Trouble Area100 % Duty RatioSee waveform 1Any Air Injection (AIR) System operationP1613Open in diagnostic signal circuitAir Injection Control Driver (AID)Open in AID +B circuit (AID power source)Short between +B circuit and diagnostic signal circuit0 % Duty RatioSee waveform 2AIR System: ON(Air pump ON, ASV ON)P1613Open or short in air pump or Air Switching Valve (ASV) command signal circuit (ECM - AID)Open in AID ground circuitShort between diagnostic signal circuit and body groundAIDECMAIR System: OFF(Air pump OFF, ASV OFF)-Normal 20 % Duty RatioSee waveform 3Air Pump: ONP0418Short between air pump drive circuit and body groundHarness & connector (AID - Pump)Air PumpAIDECMAir Pump: OFFP0418Open in air pump drive circuit (AID - Pump), or short between air pump drive circuit and +BHarness & connector (AID - Pump)Air PumpAIDECM 40 % Duty RatioSee waveform 4ASV: ONP0412Short between ASV drive circuit and body groundHarness & connector (AID - ASV)ASVAIDECMASV: OFFP0412Open in ASV drive circuit (AID - ASV), or short between ASV drive circuit and +BHarness & connector (AID - ASV)AIDASVECM 80 % Duty RatioSee waveform 5AIR System: OFF(Air pump OFF, ASV OFF)P1613AIDECMAIR System: ON(Air pump ON, ASV ON)-Normal Excluding Above(excluding 0, 20, 40, 80, 100 % duty)-P1613AIDOpen in AID ground circuit 4Runner
    On the tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / AIR INJ CHECK / MANUAL / OPERATION 1 and 2.
    HINT:
    OPERATION 1: AP: OFF; EASV: CLOSE; ASV1: CLOSE; ASV2: OFF
    OPERATION 2: AP: ON; EASV: OPEN; ASV1: OPEN; ASV2: OPEN
  8. This AIR INJECTION CHECK only allows technicians to operate the AIR 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 AIR 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. 4Runner
    Monitor the voltage output of the AID (duty ratio signal).

    Oscilloscope range
    Item
    		Content
    Terminal
    		CH1: AIDI - E1
    Equipment Setting
    		5 V/DIV., 20 to 40 msec./DIV.
    Condition
    		Idling
    NOTICE:
    1. This AIR INJECTION CHECK only allows technicians to operate the AIR 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 AIR 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.
    2. 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.
    3. 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.
    4. Turn the ignition switch OFF when the AIR INJ CHECK operation finishes.

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

Waveform 1
  1. 0 % Duty Ratio 4Runner
    100 % Duty Ratio

Waveform 2
  1. 20 % Duty Ratio 4Runner
    0 % Duty Ratio

Waveform 3
  1. 40 % Duty Ratio 4Runner
    20 % Duty Ratio

Waveform 4
  1. 80 % Duty Ratio 4Runner
    40 % Duty Ratio

Waveform 5
  1. Using the AIR INJ 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. 4Runner
    80 % Duty Ratio
HINT:
  1. Using the AIR INJ 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.
  2. Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1613)

  1. Connect the intelligent tester to the DLC3 with CAN VIM.

  1. Turn the ignition switch ON and turn the tester ON.

  1. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.

  1. Read DTCs.

    Result:

    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.


Bnext
GO TO DTC CHART
A
next down

2.PERFORM ACTIVE TEST BY INTELLIGENT TESTER (AIDI VOLTAGE)
  1. Start the engine and warm it up. 4Runner

  2. Start the engine and warm it up.

  1. Turn the ignition switch OFF.

  1. Connect the intelligent tester to the DLC3 with CAN VIM.

  1. Turn the ignition switch ON and turn the tester ON.

  1. Start the engine.

  1. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / AIR INJ CHECK / AUTOMATIC.

    NOTICE:
    1. 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.
    2. Turn the ignition switch OFF when the AIR INJ CHECK operation finishes.

  1. Measure the voltage between AIDI terminal of the ECM connector and body ground when the air injection system is ON and OFF.

    Result:

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


Bnext
Go to step 5

Cnext
Go to step 8
A
next down

3.INSPECT ECM (AIRP AND AIRV VOLTAGE)
  1. Turn the ignition switch ON. 4Runner

  2. Turn the ignition switch ON.

  1. Measure the voltage between terminal E8-25 (AIRP), E8-4 (AIRV) of the ECM connector and body ground.

    Standard voltage:
    Tester Connection
    		Specified Condition
    AIRP (E8-25) - Body ground
    		10 V or more
    AIRV (E8-4) - Body ground
    		10 V or more


NGnext
REPLACE ECM
OK
next down

4.CHECK HARNESS AND CONNECTOR (ECM - AIR INJECTION CONTROL DRIVER, AIR INJECTION CONTROL DRIVER - BODY GROUND)
  1. Disconnect the A44 air injection driver connector. 4Runner

  2. Disconnect the A44 air injection driver connector.

  1. Disconnect the E8 ECM connector.

  1. Measure the resistance between the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    SIP (A44-4) or AIRP (E8-25) - Body ground
    		10 kΩ or higher
    SIV (A44-3) or AIRV (E8-4) - Body ground
    		10 kΩ or higher
    E (A44-1) - Body ground
    		Below 1 Ω

  1. Measure the voltage between terminals DI (A44-2) and E(A44-1) of the air injection driver wire harness side connectors.

    Standard voltage:
    Tester Connection
    		Specified Condition
    DI (A44-2) - E (A44-1)
    		9 V or more

  1. Reconnect air injection driver connector.

  1. Reconnect ECM connector.



NGnext
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
next down
REPLACE AIR INJECTION CONTROL DRIVER

5.CHECK POWER SOURCE OF AIR INJECTION CONTROL DRIVER
  1. Disconnect the A44 Air Injection Control Driver (AID) connector. 4Runner

  2. Disconnect the A44 Air Injection Control Driver (AID) connector.

  1. Turn the ignition switch ON.

  1. Measure the voltage between the terminal +B (A44-5) and E (A44-1) of the AID connector.

    Standard voltage:
    Tester Connection
    		Specified Condition
    +B (A44-5) - E (A44-1)
    		10 V or more


NGnext
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
next down

6.INSPECT AIR INJECTION CONTROL DRIVER (DI TERMINAL VOLTAGE)
  1. Disconnect the A44 AID connector. 4Runner

  2. Disconnect the A44 AID connector.

  1. Turn the ignition switch ON.

  1. Measure the voltage between the terminal A44-2 (DI) of the AID connector and body ground.

    Standard voltage:
    Tester Connection
    		Specified Condition
    DI (A44-2) - Body ground
    		10 V or more

  1. Reconnect the AID connector.



OKnext
REPLACE AIR INJECTION CONTROL DRIVER
NG
next down

7.CHECK HARNESS AND CONNECTOR (ECM - AIR INJECTION CONTROL DRIVER)
  1. Disconnect the A44 air injection driver connector. 4Runner

  2. Disconnect the A44 air injection driver connector.

  1. Disconnect the E8 ECM connector.

  1. Check the resistance between the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    DI (A44-2) - AIDI (E8-13)
    		Below 1 Ω
    DI (A44-2) or AIDI (E8-13) - +B (A44-5)
    		10 kΩ or higher


NGnext
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
next down
REPLACE ECM

8.CHECK HARNESS AND CONNECTOR (AIR INJECTION DRIVER - BODY GROUND)
  1. Disconnect the A44 AID connector. 4Runner

  2. Disconnect the A44 AID connector.

  1. Measure the resistance between the terminal E (A44-1) of the AID connector and body ground.

    Standard resistance:
    Tester Connection
    		Specified Condition
    E (A44-1) - Body ground
    		Below 1 Ω

  1. Reconnect the AID connector.



NGnext
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
next down

9.REPLACE AIR INJECTION CONTROL DRIVER

  1. Replace AID.


NEXT
next down

10.CHECK WHETHER DTC OUTPUT RECURS (DTC P1613)

  1. Connect the intelligent tester to the DLC3 with CAN VIM.

  1. Turn the ignition switch ON and turn the tester ON.

  1. Clear the DTCs (Click here).

  1. Start the engine.

  1. Perform ACTIVE TEST to operate the air injection system.
    Enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / AIR INJ CHECK / AUTOMATIC.

  1. 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.

    NOTICE:
    1. 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.
    2. Turn the ignition switch OFF when the AIR INJ CHECK operation finishes.
    OK:
    DTC P1613 for the secondary air injection system is not output.


NGnext
GO TO DTC CHART
OK
next down
END