Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
2Tr-Fe Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)
CHECK HARNESS AND CONNECTOR (IGNITION COIL - ECM)
CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353 OR P0354)
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 |
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.
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 | No IGF signal is sent to the ECM while the engine is running (ECM does not receive any IGF signals despite the ECM sending an IGT signal to the igniter) (1 trip detection logic). |
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- Reference: Inspection using an oscilloscope.
Tester Connection Tool Setting Condition Specified Condition C75-17 (IGT1) - C75-3 (E1) 2 V/DIV., 20 msec./DIV. Idling The correct waveform is as shown C75-16 (IGT2) - C75-3 (E1) 2 V/DIV., 20 msec./DIV. Idling The correct waveform is as shown C75-15 (IGT3) - C75-3 (E1) 2 V/DIV., 20 msec./DIV. Idling The correct waveform is as shown C75-14 (IGT4) - C75-3 (E1) 2 V/DIV., 20 msec./DIV. Idling The correct waveform is as shown C75-23 (IGF1) - C75-3 (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 4) and E1, and IGF1 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
| Required Sensors/Components (Main) | Igniter |
| Required Sensors/Components (Related) | ECM |
| Frequency of Operation | Continuous |
CONFIRMATION DRIVING PATTERN
- Start the engine and run it at idle for 10 seconds or more.
WIRING DIAGRAM
INSPECTION PROCEDURE
- HINT:
- Read freeze frame data using the intelligent tester. 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.
| 1.INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE) |
Disconnect the ignition coil connector.
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Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition C70-1 (+B) - C70-4 (GND) Ignition switch ON 11 to 14 V C71-1 (+B) - C71-4 (GND) Ignition switch ON 11 to 14 V C72-1 (+B) - C72-4 (GND) Ignition switch ON 11 to 14 V C73-1 (+B) - C73-4 (GND) Ignition switch ON 11 to 14 V
Text in Illustration *a Front view of wire harness connector
(to Ignition Coil Assembly)
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| OK | |
| 2.CHECK HARNESS AND CONNECTOR (IGNITION COIL - ECM) |
Disconnect the ignition coil connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C70-2 (IGF) - C75-23 (IGF1) Always Below 1 Ω C71-2 (IGF) - C75-23 (IGF1) Always Below 1 Ω C72-2 (IGF) - C75-23 (IGF1) Always Below 1 Ω C73-2 (IGF) - C75-23 (IGF1) Always Below 1 Ω C70-3 (IGT1) - C75-17 (IGT1) Always Below 1 Ω C71-3 (IGT2) - C75-16 (IGT2) Always Below 1 Ω C72-3 (IGT3) - C75-15 (IGT3) Always Below 1 Ω C73-3 (IGT4) - C75-14 (IGT4) Always Below 1 Ω C70-2 (IGF) or C75-23 (IGF1) - Body ground Always 10 kΩ or higher C71-2 (IGF) or C75-23 (IGF1) - Body ground Always 10 kΩ or higher C72-2 (IGF) or C75-23 (IGF1) - Body ground Always 10 kΩ or higher C73-2 (IGF) or C75-23 (IGF1) - Body ground Always 10 kΩ or higher C70-3 (IGT1) or C75-17 (IGT1) - Body ground Always 10 kΩ or higher C71-3 (IGT2) or C75-16 (IGT2) - Body ground Always 10 kΩ or higher C72-3 (IGT3) or C75-15 (IGT3) - Body ground Always 10 kΩ or higher C73-3 (IGT4) or C75-14 (IGT4) - Body ground Always 10 kΩ or higher
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| OK | |
| 3.CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353 OR P0354) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the intelligent tester on.
Clear the DTCs (HILUX_TGN26 RM000000PDK130X.html).
Shuffle the arrangement of the ignition coil assemblies (among the No. 1 to No. 4 cylinders).
- NOTICE:
- Do not shuffle the connectors.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Check the DTCs output on the intelligent tester.
Result Result Proceed to Same DTC is output A Different ignition coil DTC is output B
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| A | ||
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