- Ignition system
- Open or short in IGF1 or IGT circuit (1 to 8) between ignition coil with igniter and ECM
- No. 1 to No. 8 ignition coils with igniters
- ECM
| Last Modified: 11-29-2007 | 1.6 C | |
| Service Category: Engine/Hybrid System | Section: Engine Control | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000000XH4068X |
| Title: 2UZ-FE ENGINE CONTROL: SFI SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
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 |
|
DTC |
P0357 |
Ignition Coil "G" Primary / Secondary Circuit |
|
DTC |
P0358 |
Ignition Coil "H" Primary / Secondary Circuit |
DESCRIPTION
HINT:
- These DTCs indicate malfunctions relating to the primary circuit.
- If DTC P0351 is stored, check the No. 1 ignition coil with igniter circuit.
- If DTC P0352 is stored, check the No. 2 ignition coil with igniter circuit.
- If DTC P0353 is stored, check the No. 3 ignition coil with igniter circuit.
- If DTC P0354 is stored, check the No. 4 ignition coil with igniter circuit.
- If DTC P0355 is stored, check the No. 5 ignition coil with igniter circuit.
- If DTC P0356 is stored, check the No. 6 ignition coil with igniter circuit.
- If DTC P0357 is stored, check the No. 7 ignition coil with igniter circuit.
- If DTC P0358 is stored, check the No. 8 ignition coil with igniter 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) |
|
Reference: Inspection using an oscilloscope.
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.
|
Item |
Content |
|---|---|
|
Terminal |
CH1: IGT1, IGT2, IGT3, IGT4, IGT5, IGT6 , IGT7, IGT8 - E1 CH2: IGF1, IGF2 - E1 |
|
Equipment Setting |
2 V/DIV. 20 msec./DIV. |
|
Condition |
Cranking or idling |
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 |
About 1 second |
|
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
|
IGF signal |
ECM does not receive any IGF signal despite ECM sending IGT signal to igniter |
COMPONENT OPERATING RANGE
|
IGF signal |
Igniter transmits IGF signal when it receives IGT signal from ECM |
WIRING DIAGRAM
INSPECTION PROCEDURE
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 with igniter connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D5-4 (GND) - Body ground |
Always |
Below 1 Ω |
|
D13-4 (GND) - Body ground |
Always |
Below 1 Ω |
|
D6-4 (GND) - Body ground |
Always |
Below 1 Ω |
|
D12-4 (GND) - Body ground |
Always |
Below 1 Ω |
|
D7-4 (GND) - Body ground |
Always |
Below 1 Ω |
|
D11-4 (GND) - Body ground |
Always |
Below 1 Ω |
|
D8-4 (GND) - Body ground |
Always |
Below 1 Ω |
|
D10-4 (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 |
|---|---|---|
|
D5-1 (+B) - D5-4 (GND) |
Ignition switch ON |
11 to 14 V |
|
D13-1 (+B) - D13-4 (GND) |
Ignition switch ON |
11 to 14 V |
|
D6-1 (+B) - D6-4 (GND) |
Ignition switch ON |
11 to 14 V |
|
D12-1 (+B) - D12-4 (GND) |
Ignition switch ON |
11 to 14 V |
|
D7-1 (+B) - D7-4 (GND) |
Ignition switch ON |
11 to 14 V |
|
D11-1 (+B) - D11-4 (GND) |
Ignition switch ON |
11 to 14 V |
|
D8-1 (+B) - D8-4 (GND) |
Ignition switch ON |
11 to 14 V |
|
D10-1 (+B) - D10-4 (GND) |
Ignition switch ON |
11 to 14 V |
|
|
2. |
CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM) |
(a) Disconnect the ignition coil with igniter 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 |
|---|---|---|
|
D5-2 (IGF1) - D56-104 (IGF1) |
Always |
Below 1 Ω |
|
D13-2 (IGF2) - D56-105 (IGF2) |
Always |
Below 1 Ω |
|
D6-2 (IGF2) - D56-105 (IGF2) |
Always |
Below 1 Ω |
|
D12-2 (IGF1) - D56-104 (IGF1) |
Always |
Below 1 Ω |
|
D7-2 (IGF2) - D56-105 (IGF2) |
Always |
Below 1 Ω |
|
D11-2 (IGF1) - D56-104 (IGF1) |
Always |
Below 1 Ω |
|
D8-2 (IGF1) - D56-104 (IGF1) |
Always |
Below 1 Ω |
|
D10-2 (IGF2) - D56-105 (IGF2) |
Always |
Below 1 Ω |
|
D5-3 (IGT1) - D56-40 (IGT1) |
Always |
Below 1 Ω |
|
D13-3 (IGT2) - D56-33 (IGT2) |
Always |
Below 1 Ω |
|
D6-3 (IGT3) - D56-37 (IGT3) |
Always |
Below 1 Ω |
|
D12-3 (IGT4) - D56-38 (IGT4) |
Always |
Below 1 Ω |
|
D7-3 (IGT5) - D56-35 (IGT5) |
Always |
Below 1 Ω |
|
D11-3 (IGT6) - D56-36 (IGT6) |
Always |
Below 1 Ω |
|
D8-3 (IGT7) - D56-34 (IGT7) |
Always |
Below 1 Ω |
|
D10-3 (IGT8) - D56-39 (IGT8) |
Always |
Below 1 Ω |
|
D5-2 (IGF1) or D56-104 (IGF1) - Body ground |
Always |
10 kΩ or higher |
|
D13-2 (IGF2) or D56-105 (IGF2) - Body ground |
Always |
10 kΩ or higher |
|
D6-2 (IGF2) or D56-105 (IGF2) - Body ground |
Always |
10 kΩ or higher |
|
D12-2 (IGF1) or D56-104 (IGF1) - Body ground |
Always |
10 kΩ or higher |
|
D7-2 (IGF2) or D56-105 (IGF2) - Body ground |
Always |
10 kΩ or higher |
|
D11-2 (IGF1) or D56-104 (IGF1) - Body ground |
Always |
10 kΩ or higher |
|
D8-2 (IGF1) or D56-104 (IGF1) - Body ground |
Always |
10 kΩ or higher |
|
D10-2 (IGF2) or D56-105 (IGF2) - Body ground |
Always |
10 kΩ or higher |
|
D5-3 (IGT1) or D56-40 (IGT1) - Body ground |
Always |
10 kΩ or higher |
|
D13-3 (IGT2) or D56-33 (IGT2) - Body ground |
Always |
10 kΩ or higher |
|
D6-3 (IGT3) or D56-37 (IGT3) - Body ground |
Always |
10 kΩ or higher |
|
D12-3 (IGT4) or D56-38 (IGT4) - Body ground |
Always |
10 kΩ or higher |
|
D7-3 (IGT5) or D56-35 (IGT5) - Body ground |
Always |
10 kΩ or higher |
|
D11-3 (IGT6) or D56-36 (IGT6) - Body ground |
Always |
10 kΩ or higher |
|
D8-3 (IGT7) or D56-34 (IGT7) - Body ground |
Always |
10 kΩ or higher |
|
D10-3 (IGT8) or D56-39 (IGT8) - Body ground |
Always |
10 kΩ or higher |
|
|
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
.
(e) Shuffle arrangement of the ignition coils with igniters (among No. 1 to No. 8 cylinders).
NOTICE:
Do not shuffle the connectors.
(f) Perform a simulation test.
(g) Check DTCs displayed on the Techstream.
Result
|
Result |
Proceed to |
|---|---|
|
Same DTC is output |
A |
|
Different ignition coil DTC is output |
B |
|
|
|