Toyota Tundra Service Manual: Ignition Coil "A" Primary / Secondary Circuit (P0351-P0358)

Toyota Tundra Service Manual / Engine, Hybrid System / 1ur-fe Engine Control / Sfi System / Ignition Coil "A" Primary / Secondary Circuit (P0351-P0358)

DESCRIPTION

HINT:

  • These DTCs indicate malfunctions relating to the primary circuit.
  • If DTC P0351 is stored, check the No. 1 ignition coil circuit.
  • If DTC P0352 is stored, check the No. 2 ignition coil circuit.
  • If DTC P0353 is stored, check the No. 3 ignition coil circuit.
  • If DTC P0354 is stored, check the No. 4 ignition coil circuit.
  • If DTC P0355 is stored, check the No. 5 ignition coil circuit.
  • If DTC P0356 is stored, check the No. 6 ignition coil circuit.
  • If DTC P0357 is stored, check the No. 7 ignition coil circuit.
  • If DTC P0358 is stored, check the No. 8 ignition coil circuit.

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 electrode 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.

DTC No.

DTC Detection Condition

Trouble Area

P0351

P0352

P0353

P0354

P0355

P0356

P0357

P0358

No IGF signal to ECM while engine running

(1 trip detection logic)

  • Ignition system
  • Open or short in IGF or IGT circuit (1 to 8) between ignition coil and ECM
  • No. 1 to No. 8 ignition coils
  • ECM
  • Reference: Inspection using an oscilloscope.
  • Standard:

    Tester Connection

    Tool Setting

    Condition

    Specified Condition

    D74-40 (IGT1) - D74-81 (E1)

    2 V/DIV., 20 msec./DIV.

    Idling

    The correct waveform is as shown

    D74-33 (IGT2) - D74-81 (E1)

    2 V/DIV., 20 msec./DIV.

    Idling

    The correct waveform is as shown

    D74-37 (IGT3) - D74-81 (E1)

    2 V/DIV., 20 msec./DIV.

    Idling

    The correct waveform is as shown

    D74-34 (IGT4) - D74-81 (E1)

    2 V/DIV., 20 msec./DIV.

    Idling

    The correct waveform is as shown

    D74-35 (IGT5) - D74-81 (E1)

    2 V/DIV., 20 msec./DIV.

    Idling

    The correct waveform is as shown

    D74-36 (IGT6) - D74-81 (E1)

    2 V/DIV., 20 msec./DIV.

    Idling

    The correct waveform is as shown

    D74-38 (IGT7) - D74-81 (E1)

    2 V/DIV., 20 msec./DIV.

    Idling

    The correct waveform is as shown

    D74-39 (IGT8) - D74-81 (E1)

    2 V/DIV., 20 msec./DIV.

    Idling

    The correct waveform is as shown

    D74-104 (IGF1) - D74-81 (E1)

    2 V/DIV., 20 msec./DIV.

    Idling

    The correct waveform is as shown

    D74-105 (IGF2) - D74-81 (E1)

    2 V/DIV., 20 msec./DIV.

    Idling

    The correct waveform is as shown

    HINT:

    While cranking or idling the engine, check the waveform between terminals IGT (1 to 8) and E1, and IGF1 or IGF2 and E1 of the ECM connector.

MONITOR DESCRIPTION

If the ECM does not receive any IGF signals despite transmitting the IGT signal, it interprets this as a fault in the igniter and stores a DTC.

If the malfunction is not repaired successfully, a DTC is stored 1 second after the engine is next started.

MONITOR STRATEGY

Related DTCs

P0351: Igniter (cylinder 1) malfunction

P0352: Igniter (cylinder 2) malfunction

P0353: Igniter (cylinder 3) malfunction

P0354: Igniter (cylinder 4) malfunction

P0355: Igniter (cylinder 5) malfunction

P0356: Igniter (cylinder 6) malfunction

P0357: Igniter (cylinder 7) malfunction

P0358: Igniter (cylinder 8) malfunction

Required Sensors/Components (Main)

Igniter

Required Sensors/Components (Related)

Crankshaft position sensor

Frequency of Operation

Continuous

Duration

0.256 seconds

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever following DTCs not present

None

Either of following conditions A or B met

-

A. Engine RPM

1500 rpm or less

B. Starter

OFF

Either of following conditions C or D met

-

C. Both of following conditions (a) and (b) met

-

(a) Engine speed

500 rpm or less

(b) Battery voltage

6 V or more

D. All of following conditions (a), (b) and (c) met

-

(a) Engine speed

More than 500 rpm

(b) Battery voltage

10 V or more

(c) Number of sparks after CPU reset

5 sparks or more

TYPICAL MALFUNCTION THRESHOLDS

All of the following conditions are met

A. B. C and D

A. Ignition signal fail counter

More than 2 times

B. Time after condition A is met

0.256 seconds or more

C. Ignition signal fail count after condition B is met

More than 2 times

D. Ignition switch

ON

COMPONENT OPERATING RANGE

IGF signal

Igniter transmits IGF signal when it receives IGT signal from ECM

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).
  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON and turn the Techstream on.
  6. Start the engine.
  7. Idle the engine for 10 seconds or more [A].
  8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].
  9. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  11. Input the DTC: P0351, P0352, P0353, P0354, P0355, P0356, P0357 or P0358.
  12. Check the DTC judgment result.

    Tester Display

    Description

    NORMAL

    • DTC judgment completed
    • System normal

    ABNORMAL

    • DTC judgment completed
    • System abnormal

    INCOMPLETE

    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    N/A

    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    HINT:

    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE or N/A, perform steps [A] through [B] again.
  13. If no pending DTC is output, perform a universal trip and check for permanent DTCs (See page ).

    HINT:

    • If a permanent DTC is output, the system is malfunctioning.
    • If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

Read freeze frame data using the Techstream. Freeze frame data records 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.

PROCEDURE

1.

INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)

(a) Disconnect the ignition coil assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

D10-4 (GND) - Body ground

Always

Below 1 Ω

D25-4 (GND) - Body ground

Always

Below 1 Ω

D12-4 (GND) - Body ground

Always

Below 1 Ω

D23-4 (GND) - Body ground

Always

Below 1 Ω

D14-4 (GND) - Body ground

Always

Below 1 Ω

D21-4 (GND) - Body ground

Always

Below 1 Ω

D16-4 (GND) - Body ground

Always

Below 1 Ω

D91-4 (GND) - Body ground

Always

Below 1 Ω

(c) Turn the ignition switch to ON.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

D10-1 (+B) - D10-4 (GND)

Ignition switch ON

11 to 14 V

D25-1 (+B) - D25-4 (GND)

Ignition switch ON

11 to 14 V

D12-1 (+B) - D12-4 (GND)

Ignition switch ON

11 to 14 V

D23-1 (+B) - D23-4 (GND)

Ignition switch ON

11 to 14 V

D14-1 (+B) - D14-4 (GND)

Ignition switch ON

11 to 14 V

D21-1 (+B) - D21-4 (GND)

Ignition switch ON

11 to 14 V

D16-1 (+B) - D16-4 (GND)

Ignition switch ON

11 to 14 V

D91-1 (+B) - D91-4 (GND)

Ignition switch ON

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)

(a) Disconnect the ignition coil assembly connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

D10-2 (IGF1) - D74-104 (IGF1)

Always

Below 1 Ω

D25-2 (IGF2) - D74-105 (IGF2)

Always

Below 1 Ω

D12-2 (IGF2) - D74-105 (IGF2)

Always

Below 1 Ω

D23-2 (IGF1) - D74-104 (IGF1)

Always

Below 1 Ω

D14-2 (IGF2) - D74-105 (IGF2)

Always

Below 1 Ω

D21-2 (IGF1) - D74-104 (IGF1)

Always

Below 1 Ω

D16-2 (IGF1) - D74-104 (IGF1)

Always

Below 1 Ω

D91-2 (IGF2) - D74-105 (IGF2)

Always

Below 1 Ω

D10-3 (IGT1) - D74-40 (IGT1)

Always

Below 1 Ω

D25-3 (IGT2) - D74-33 (IGT2)

Always

Below 1 Ω

D12-3 (IGT3) - D74-37 (IGT3)

Always

Below 1 Ω

D23-3 (IGT4) - D74-34 (IGT4)

Always

Below 1 Ω

D14-3 (IGT5) - D74-35 (IGT5)

Always

Below 1 Ω

D21-3 (IGT6) - D74-36 (IGT6)

Always

Below 1 Ω

D16-3 (IGT7) - D74-38 (IGT7)

Always

Below 1 Ω

D91-3 (IGT8) - D74-39 (IGT8)

Always

Below 1 Ω

D10-2 (IGF1) or D74-104 (IGF1) - Body ground

Always

10 kΩ or higher

D25-2 (IGF2) or D74-105 (IGF2) - Body ground

Always

10 kΩ or higher

D12-2 (IGF2) or D74-105 (IGF2) - Body ground

Always

10 kΩ or higher

D23-2 (IGF1) or D74-104 (IGF1) - Body ground

Always

10 kΩ or higher

D14-2 (IGF2) or D74-105 (IGF2) - Body ground

Always

10 kΩ or higher

D21-2 (IGF1) or D74-104 (IGF1) - Body ground

Always

10 kΩ or higher

D16-2 (IGF1) or D74-104 (IGF1) - Body ground

Always

10 kΩ or higher

D91-2 (IGF2) or D74-105 (IGF2) - Body ground

Always

10 kΩ or higher

D10-3 (IGT1) or D74-40 (IGT1) - Body ground

Always

10 kΩ or higher

D25-3 (IGT2) or D74-33 (IGT2) - Body ground

Always

10 kΩ or higher

D12-3 (IGT3) or D74-37 (IGT3) - Body ground

Always

10 kΩ or higher

D23-3 (IGT4) or D74-34 (IGT4) - Body ground

Always

10 kΩ or higher

D14-3 (IGT5) or D74-35 (IGT5) - Body ground

Always

10 kΩ or higher

D21-3 (IGT6) or D74-36 (IGT6) - Body ground

Always

10 kΩ or higher

D16-3 (IGT7) or D74-38 (IGT7) - Body ground

Always

10 kΩ or higher

D91-3 (IGT8) or D74-39 (IGT8) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353, P0354, P0355, P0356, P0357 OR P0358)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear DTCs (See page ).

(e) Shuffle the arrangement of the ignition coil assemblies (among No. 1 to No. 8 cylinders).

NOTICE:

Do not shuffle the connectors.

(f) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

(g) Check DTCs displayed on the Techstream.

Result

Result

Proceed to

Same DTC is output

A

Different ignition coil DTC is output

B

HINT:

Perform "Inspection After Repair" after replacing the ignition coil assembly (See page ).

A

REPLACE ECM

B

REPLACE IGNITION COIL ASSEMBLY

    Camshaft Position Sensor Circuit (P0340,P0342,P0343,P0345,P0347,P0348)

    Camshaft Position Sensor "B" Circuit (Bank 1) (P0365,P0367,P0368,P0390,P0392,P0393)

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