Brand:

Toyota

Model Name:

4Runner GRN210 215 UZN210 215

Manual:

Repair Manual

Section:

1Gr-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 whether dtc output recurs (dtc p0351, p0352, p0353, p0354, p0355 or p0356)

  10. Inspect ecm (igt1, igt2, igt3, igt4, igt5 igt6 and igf1 signal)

  11. Check harness and connector (ignition coil assembly - ecm)

  12. Inspect ignition coil assembly (power source)

  13. Check harness and connector (ignition coil assembly - ignition switch)

DTC P0351 Ignition Coil "A" Primary / Secondary Circuit

DTC P0352 Ignition Coil "B" Primary / Secondary Circuit

DTC P0353 Ignition Coil "C" Primary / Secondary Circuit

DTC P0354 Ignition Coil "D" Primary / Secondary Circuit

DTC P0355 Ignition Coil "E" Primary / Secondary Circuit

DTC P0356 Ignition Coil "F" Primary / Secondary Circuit

HINT:
  1. These DTCs indicate malfunctions relating to the primary circuit.
  2. If DTC P0351 is set, check No. 1 ignition coil with igniter circuit.
  3. If DTC P0352 is set, check No. 2 ignition coil with igniter circuit.
  4. If DTC P0353 is set, check No. 3 ignition coil with igniter circuit.
  5. If DTC P0354 is set, check No. 4 ignition coil with igniter circuit.
  6. If DTC P0355 is set, check No. 5 ignition coil with igniter circuit.
  7. If DTC P0356 is set, check No. 6 ignition coil with igniter circuit.

DESCRIPTION

A Direct Ignition System (DIS) is used on this vehicle.
The DIS is a 1-cylinder ignition system in which each cylinder is ignited by one ignition coil and one spark plug is connected to the end of each secondary wiring. A powerful voltage, generated in the secondary wiring, is applied directly to each spark plug. The sparks of the spark plugs pass from the center electrodes to the ground electrodes.
The ECM determines the ignition timing and transmits the ignition (IGT) signals to each cylinder. Using the IGT signal, the ECM turns the power transistor inside the igniter on and off. The power transistor, in turn, switches on and off the current to the primary coil. When the current to the primary coil is cut off, a powerful voltage is generated in the secondary coil. This voltage is applied to the spark plugs, causing them to spark inside the cylinders. As the ECM cuts the current to the primary coil, the igniter sends back an ignition confirmation (IGF) signal to the ECM, for each cylinder ignition.

Ignition system 4Runner


DTC No.
DTC Detection Conditions
Trouble Areas
P0351
P0352
P0353
P0354
P0355
P0356
No IGF signal to ECM while engine running (1 trip detection logic)
  1. Ignition system
  2. Open or short in IGF1 or IGT circuit (1 to 6) between ignition coil with igniter and ECM
  3. No. 1 to No. 6 ignition coils with igniters
  4. ECM
Reference: Inspection using an oscilloscope
Connect the intelligent tester to the DLC3. 4Runner
While cranking or idling, check the waveform between terminals IGT (1 to 6) and E1, and IGF1 and E1 of the ECM connector.
Items
Contents
Terminals
CH1: IGT1, IGT2, IGT3, IGT4, IGT5, IGT6 - E1
CH2: IGF1 - E1
Equipment Settings
2 V/Division, 20 ms/Division
Conditions
Cranking or idling

MONITOR DESCRIPTION


Connect the intelligent tester to the DLC3. 4Runner

If the EMC does not receive the ignition confirmation (IGF) signal after sending the ignition (IGT) signal, it interprets as a fault in the igniter and sets a DTC.

MONITOR STRATEGY


Related DTCs
P0351: No.1 ignition coil with igniter circuit malfunction
P0352: No.2 ignition coil with igniter circuit malfunction
P0353: No.3 ignition coil with igniter circuit malfunction
P0354: No.4 ignition coil with igniter circuit malfunction
P0355: No.5 ignition coil with igniter circuit malfunction
P0356: No.6 ignition coil with igniter circuit malfunction
Required Sensors / Components (Main)
Igniter
Required Sensors / Components (Related)
Crankshaft position sensor
Frequency of Operation
Continuous
Duration
0.256 seconds +4 sparks
MIL Operation
Immediate
Sequence of Operation
None

TYPICAL ENABLING CONDITIONS


The monitor will run whenever these DTCs are not present
None
Engine speed
1,500 rpm or less
Either of the following conditions is met:
Condition 1 or 2
1. Following conditions are met:
Condition (a) and (b)
(a) Engine RPM
500 rpm or less
(b) Battery voltage
6 V or more
2. Following conditions are met:
Condition (c), (d) and (e)
(c) Engine RPM
More than 500 rpm
(d) Battery voltage
10 V or more
(e) Number of sparks after CPU is reset
5 sparks or more

TYPICAL MALFUNCTION THRESHOLDS


Ignition signal fail count
More than 2
Ignition signal fail count is on the right:
When IGF does not return despite sending IGT.

COMPONENT OPERATING RANGE


IGF signal
Igniter outputs IGF signal when it receives IGT signal from ECM

WIRING DIAGRAM


Connect the intelligent tester to the DLC3. 4Runner


INSPECTION PROCEDURE

HINT:
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 WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353, P0354, P0355 OR P0356)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester ON.

  1. Clear DTCs (Click here).

  1. Shuffle arrangement of the ignition coils with igniters (among No. 1 to No. 6 cylinders).

    NOTICE:
    Do not shuffle the connectors.

  1. Perform a simulation test.

  1. Check DTCs displayed on the tester.

    Result:

    Display (DTC Output)
    		Proceed to
    P0351, P0352, P0353, P0354, P0355 or P0356
    		A
    Any other DTCs
    		B


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REPLACE IGNITION COIL ASSEMBLY
A
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2.INSPECT ECM (IGT1, IGT2, IGT3, IGT4, IGT5 IGT6 AND IGF1 SIGNAL)
  1. Inspect the ECM using an oscilloscope. 4Runner

  2. Inspect the ECM using an oscilloscope.

  1. While cranking or idling, check the waveform between the terminals of the E4 and E6 ECM connector.

    Standard:
    Tester Connections
    		Specified Conditions
    IGT1 (E4-8) - E1 (E6-1)
    		Correct waveform shown
    IGT2 (E4-9) - E1 (E6-1)
    		Correct waveform shown
    IGT3 (E4-10) - E1 (E6-1)
    		Correct waveform shown
    IGT4 (E4-11) - E1 (E6-1)
    		Correct waveform shown
    IGT5 (E4-12) - E1 (E6-1)
    		Correct waveform shown
    IGT6 (E4-13) - E1 (E6-1)
    		Correct waveform shown
    IGF1 (E4-24) - E1 (E6-1)
    		Correct waveform shown


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REPLACE ECM
OK
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3.CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)
  1. Disconnect the I1, I2, I3, I4, I5 or I6 ignition coil with igniter connector. 4Runner

  2. Disconnect the I1, I2, I3, I4, I5 or I6 ignition coil with igniter connector.

  1. Disconnect the E4 ECM connector.

  1. Measure the resistance.

    Standard resistance (Check for open):
    Tester Connections
    		Specified Conditions
    IGF (I1-2) - IGF1 (E4-24)
    		Below 1 Ω
    IGF (I2-2) - IGF1 (E4-24)
    		Below 1 Ω
    IGF (I3-2) - IGF1 (E4-24)
    		Below 1 Ω
    IGF (I4-2) - IGF1 (E4-24)
    		Below 1 Ω
    IGF (I5-2) - IGF1 (E4-24)
    		Below 1 Ω
    IGF (I6-2) - IGF1 (E4-24)
    		Below 1 Ω
    Standard resistance (Check for open):
    Tester Connections
    		Specified Conditions
    IGT (I1-3) - IGT1 (E4-8)
    		Below 1 Ω
    IGT (I2-3) - IGT2 (E4-9)
    		Below 1 Ω
    IGT (I3-3) - IGT3 (E4-10)
    		Below 1 Ω
    IGT (I4-3) - IGT4 (E4-11)
    		Below 1 Ω
    IGT (I5-3) - IGT5 (E4-12)
    		Below 1 Ω
    IGT (I6-3) - IGT6 (E4-13)
    		Below 1 Ω
    Standard resistance (Check for short):
    Tester Connections
    		Specified Conditions
    IGF (I1-2) or IGF1 (E4-24) - Body ground
    		10 kΩ or higher
    IGF (I2-2) or IGF1 (E4-24) - Body ground
    		10 kΩ or higher
    IGF (I3-2) or IGF1 (E4-24) - Body ground
    		10 kΩ or higher
    IGF (I4-2) or IGF1 (E4-24) - Body ground
    		10 kΩ or higher
    IGF (I5-2) or IGF1 (E4-24) - Body ground
    		10 kΩ or higher
    IGF (I6-2) or IGF1 (E4-24) - Body ground
    		10 kΩ or higher
    Standard resistance (Check for short):
    Tester Connections
    		Specified Conditions
    IGT (I1-3) or IGT1 (E4-8) - Body ground
    		10 kΩ or higher
    IGT (I2-3) or IGT2 (E4-9) - Body ground
    		10 kΩ or higher
    IGT (I3-3) or IGT3 (E4-10) - Body ground
    		10 kΩ or higher
    IGT (I4-3) or IGT4 (E4-11) - Body ground
    		10 kΩ or higher
    IGT (I5-3) or IGT5 (E4-12) - Body ground
    		10 kΩ or higher
    IGT (I6-3) or IGT6 (E4-13) - Body ground
    		10 kΩ or higher

  1. Reconnect the ECM connector.

  1. Reconnect the ignition coil with igniter connector.



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REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
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4.INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)
  1. Disconnect the I1, I2, I3, I4, I5 or I6 ignition coil with igniter connector. 4Runner

  2. Disconnect the I1, I2, I3, I4, I5 or I6 ignition coil with igniter connector.

  1. Measure the resistance.

    Standard resistance (Check for open):
    Tester Connections
    		Specified Conditions
    GND (I1-4) - Body ground
    		Below 1 Ω
    GND (I2-4) - Body ground
    		Below 1 Ω
    GND (I3-4) - Body ground
    		Below 1 Ω
    GND (I4-4) - Body ground
    		Below 1 Ω
    GND (I5-4) - Body ground
    		Below 1 Ω
    GND (I6-4) - Body ground
    		Below 1 Ω

  1. Turn the ignition switch on.

  1. Measure the voltage between the terminals of the wire harness side connector.

    Standard voltage:
    Tester Connections
    		Specified Conditions
    +B (I1-1) - GND (I1-4)
    		9 to 14 V
    +B (I2-1) - GND (I2-4)
    		9 to 14 V
    +B (I3-1) - GND (I3-4)
    		9 to 14 V
    +B (I4-1) - GND (I4-4)
    		9 to 14 V
    +B (I5-1) - GND (I5-4)
    		9 to 14 V
    +B (I6-1) - GND (I6-4)
    		9 to 14 V

  1. Reconnect the ignition coil with igniter connector.



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Go to step 5
OK
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REPLACE IGNITION COIL ASSEMBLY

5.CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - IGNITION SWITCH)
  1. Disconnect the I1, I2, I3, I4, I5 or I6 ignition coil with igniter connector. 4Runner

  2. Disconnect the I1, I2, I3, I4, I5 or I6 ignition coil with igniter connector.

  1. Disconnect the I18 ignition switch connector.

  1. Measure the resistance.

    Standard resistance (Check for open):
    Tester Connections
    		Specified Conditions
    +B (I1-1) - IG2 (I18-6)
    		Below 1 Ω
    +B (I2-1) - IG2 (I18-6)
    		Below 1 Ω
    +B (I3-1) - IG2 (I18-6)
    		Below 1 Ω
    +B (I4-1) - IG2 (I18-6)
    		Below 1 Ω
    +B (I5-1) - IG2 (I18-6)
    		Below 1 Ω
    +B (I6-1) - IG2 (I18-6)
    		Below 1 Ω
    Standard resistance (Check for short):
    Tester Connections
    		Specified Conditions
    +B (I1-1) or IG2 (I18-6) - Body ground
    		10 kΩ or higher
    +B (I2-1) or IG2 (I18-6) - Body ground
    		10 kΩ or higher
    +B (I3-1) or IG2 (I18-6) - Body ground
    		10 kΩ or higher
    +B (I4-1) or IG2 (I18-6) - Body ground
    		10 kΩ or higher
    +B (I5-1) or IG2 (I18-6) - Body ground
    		10 kΩ or higher
    +B (I6-1) or IG2 (I18-6) - Body ground
    		10 kΩ or higher

  1. Reconnect the ignition coil with igniter connector.

  1. Reconnect the ignition switch connector.



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REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
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REPLACE IGNITION COIL ASSEMBLY