Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - 3UR-FE ENGINE CONTROL
INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)
CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)
CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353, P0354, P0355, P0356, P0357 OR P0358)
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:
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 Code | DTC Detection Condition | Trouble Area |
| P0351 P0352 P0353 P0354 P0355 P0356 P0357 P0358 | No IGF signal is sent to the ECM while the engine is running (1 trip detection logic). | Ignition system Open or short in IGF1 or IGT circuit (1 to 8) between ignition coil and ECM No. 1 to No. 8 ignition coils ECM |
- Standard:
Tester Connection Tool Setting Condition Specified Condition C45-40 (IGT1) - C45-81 (E1) 2 V/DIV., 20 msec./DIV. Idling The correct waveform is as shown C45-33 (IGT2) - C45-81 (E1) 2 V/DIV., 20 msec./DIV. Idling The correct waveform is as shown C45-37 (IGT3) - C45-81 (E1) 2 V/DIV., 20 msec./DIV. Idling The correct waveform is as shown C45-34 (IGT4) - C45-81 (E1) 2 V/DIV., 20 msec./DIV. Idling The correct waveform is as shown C45-35 (IGT5) - C45-81 (E1) 2 V/DIV., 20 msec./DIV. Idling The correct waveform is as shown C45-36 (IGT6) - C45-81 (E1) 2 V/DIV., 20 msec./DIV. Idling The correct waveform is as shown C45-38 (IGT7) - C45-81 (E1) 2 V/DIV., 20 msec./DIV. Idling The correct waveform is as shown C45-39 (IGT8) - C45-81 (E1) 2 V/DIV., 20 msec./DIV. Idling The correct waveform is as shown C45-104 (IGF1) - C45-81 (E1) 2 V/DIV., 20 msec./DIV. Idling The correct waveform is as shown C45-105 (IGF2) - C45-81 (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 DTC(s).
If the malfunction is not repaired successfully, a DTC is stored 1 second after the engine is next started.
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 C4, C6, C8, C11, C13, C15, C51 or C53 ignition coil connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C4-4 (GND) - Body ground Always Below 1 Ω C15-4 (GND) - Body ground Always Below 1 Ω C6-4 (GND) - Body ground Always Below 1 Ω C13-4 (GND) - Body ground Always Below 1 Ω C8-4 (GND) - Body ground Always Below 1 Ω C11-4 (GND) - Body ground Always Below 1 Ω C51-4 (GND) - Body ground Always Below 1 Ω C53-4 (GND) - Body ground Always Below 1 Ω
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition C4-1 (+B) - C4-4 (GND) Engine switch on (IG) 11 to 14 V C15-1 (+B) - C15-4 (GND) Engine switch on (IG) 11 to 14 V C6-1 (+B) - C6-4 (GND) Engine switch on (IG) 11 to 14 V C13-1 (+B) - C13-4 (GND) Engine switch on (IG) 11 to 14 V C8-1 (+B) - C8-4 (GND) Engine switch on (IG) 11 to 14 V C11-1 (+B) - C11-4 (GND) Engine switch on (IG) 11 to 14 V C51-1 (+B) - C51-4 (GND) Engine switch on (IG) 11 to 14 V C53-1 (+B) - C53-4 (GND) Engine switch on (IG) 11 to 14 V
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| OK | |
| 2.CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM) |
Disconnect the C4, C6, C8, C11, C13, C15, C51 or C53 ignition coil connector.
Disconnect the C45 ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C4-2 (IGF1) - C45-104 (IGF1) Always Below 1 Ω C15-2 (IGF2) - C45-105 (IGF2) Always Below 1 Ω C6-2 (IGF2) - C45-105 (IGF2) Always Below 1 Ω C13-2 (IGF1) - C45-104 (IGF1) Always Below 1 Ω C8-2 (IGF2) - C45-105 (IGF2) Always Below 1 Ω C11-2 (IGF1) - C45-104 (IGF1) Always Below 1 Ω C51-2 (IGF1) - C45-104 (IGF1) Always Below 1 Ω C53-2 (IGF2) - C45-105 (IGF2) Always Below 1 Ω C4-3 (IGT1) - C45-40 (IGT1) Always Below 1 Ω C15-3 (IGT2) - C45-33 (IGT2) Always Below 1 Ω C6-3 (IGT3) - C45-37 (IGT3) Always Below 1 Ω C13-3 (IGT4) - C45-34 (IGT4) Always Below 1 Ω C8-3 (IGT5) - C45-35 (IGT5) Always Below 1 Ω C11-3 (IGT6) - C45-36 (IGT6) Always Below 1 Ω C51-3 (IGT7) - C45-38 (IGT7) Always Below 1 Ω C53-3 (IGT8) - C45-39 (IGT8) Always Below 1 Ω C4-2 (IGF1) or C45-104 (IGF1) - Body ground Always 10 kΩ or higher C15-2 (IGF2) or C45-105 (IGF2) - Body ground Always 10 kΩ or higher C6-2 (IGF2) or C45-105 (IGF2) - Body ground Always 10 kΩ or higher C13-2 (IGF1) or C45-104 (IGF1) - Body ground Always 10 kΩ or higher C8-2 (IGF2) or C45-105 (IGF2) - Body ground Always 10 kΩ or higher C11-2 (IGF1) or C45-104 (IGF1) - Body ground Always 10 kΩ or higher C51-2 (IGF1) or C45-104 (IGF1) - Body ground Always 10 kΩ or higher C53-2 (IGF2) or C45-105 (IGF2) - Body ground Always 10 kΩ or higher C4-3 (IGT1) or C45-40 (IGT1) - Body ground Always 10 kΩ or higher C15-3 (IGT2) or C45-33 (IGT2) - Body ground Always 10 kΩ or higher C6-3 (IGT3) or C45-37 (IGT3) - Body ground Always 10 kΩ or higher C13-3 (IGT4) or C45-34 (IGT4) - Body ground Always 10 kΩ or higher C8-3 (IGT5) or C45-35 (IGT5) - Body ground Always 10 kΩ or higher C11-3 (IGT6) or C45-36 (IGT6) - Body ground Always 10 kΩ or higher C51-3 (IGT7) or C45-38 (IGT7) - Body ground Always 10 kΩ or higher C53-3 (IGT8) or C45-39 (IGT8) - Body ground Always 10 kΩ or higher
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| OK | |
| 3.CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353, P0354, P0355, P0356, P0357 OR P0358) |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and turn the tester on.
Clear DTCs ().
Shuffle the arrangement of the ignition coils (among No. 1 to No. 8 cylinders).
- NOTICE:
- Do not shuffle the connectors.
Perform a simulation test.
Check DTCs displayed on the tester.
| Result | Proceed to |
| Same DTC is output | A |
| Different ignition coil DTC is output | B |
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| A | ||
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