Lexus IS250 IS220d GSE20 ALE20 4GR-FSE ENGINE CONTROL SYSTEM
INSPECT INJECTOR DRIVER (POWER SOURCE OF EDU)
CHECK HARNESS AND CONNECTOR (EDU - FUEL INJECTOR)
CHECK HARNESS AND CONNECTOR (ECM - EDU)
CHECK ECM (#10, #20, #30, #40, #50 AND #60 VOLTAGE)
INSPECT FUEL INJECTOR (RESISTANCE)
DTC P0200 Injector Circuit / Open
DTC P0201 Injector Circuit / Open - (Cylinder 1)
DTC P0202 Injector Circuit / Open - (Cylinder 2)
DTC P0203 Injector Circuit / Open - (Cylinder 3)
DTC P0204 Injector Circuit / Open - (Cylinder 4)
DTC P0205 Injector Circuit / Open - (Cylinder 5)
DTC P0206 Injector Circuit / Open - (Cylinder 6)
DTC P12FF Electric Driver Unit
DESCRIPTION
The high speed activation of the high pressure fuel injector is possible through the high-voltage, rapid-recharge DC/DC converter. Using high pressure fuel, the atomized fuel's injection timing can be accurately controlled, which decreases emissions and fuel consumption. The steady ECM checks the injector driver movement. When the injector driver or inject has a malfunction, the injection control of the relevant cylinder is stopped or power to the injector relay is cut. Then the ECM illuminates the check engine warning light.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0200 | NO INJF signals to ECM despite crankshaft rotating 10 times (1 trip detection logic) NO INJF signals to ECM despite crankshaft rotating 20 times during cranking (2 trip detection logic) | Open or short in Injector driver (EDU) circuit Injector driver (EDU) Fuel injector assembly ECM |
| P0201 P0202 P0203 P0204 P0205 P0206 P12FF | NO INJF signals of each cylinder to ECM 20 times successively (1 trip detection logic) | Open or short in Injector driver (EDU) circuit Injector driver (EDU) Fuel injector assembly ECM |
WIRING DIAGRAM
INSPECTION PROCEDURE
- HINT:
- Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions 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 INJECTOR DRIVER (POWER SOURCE OF EDU) |
Disconnect the E58 injector driver (EDU) connector.
Turn the engine switch on (IG).
Measure the voltage of the injector driver (EDU) connector.
- Standard voltage:
Tester Connection Specified Condition +B (E58-1) - Engine ground 10 to 14 V +B2 (E58-2) - Engine ground 10 to 14 V
Reconnect the injector driver (EDU) connector.
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| OK | |
| 3.CHECK HARNESS AND CONNECTOR (ECM - EDU) |
Disconnect the E3, E5 and E6 connectors.
Disconnect the E58 injector driver (EDU) connector.
Measure the resistance of the wire harness side connectors.
- Standard resistance (Check for open):
Tester Connection Specified Condition #10 (E3-15) - #10 (E58-3) Below 1 Ω #20 (E5-17) - #20 (E58-2) Below 1 Ω #30 (E3-14) - #30 (E58-1) Below 1 Ω #40 (E5-16) - #40 (E58-12) Below 1 Ω #50 (E3-13) - #50 (E58-11) Below 1 Ω #60 (E5-15) - #60 (E58-10) Below 1 Ω INJF (E6-26) - INJF (E58-9) Below 1 Ω
- Standard resistance (Check for short):
Tester Connection Specified Condition #10 (E3-15) or #10 (E58-3) - Engine ground 10 kΩ or higher #20 (E5-17) or #20 (E58-2) - Engine ground 10 kΩ or higher #30 (E3-14) or #30 (E58-1) - Engine ground 10 kΩ or higher #40 (E5-16) or #40 (E58-12) - Engine ground 10 kΩ or higher #50 (E3-13) or #50 (E58-11) - Engine ground 10 kΩ or higher #60 (E5-15) or #60 (E58-10) - Engine ground 10 kΩ or higher INJF (E6-26) or INJF (E58-9) - Engine ground 10 kΩ or higher
Reconnect the ECM connector.
Reconnect the injector driver (EDU) connector.
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| OK | |
| 4.CHECK ECM (#10, #20, #30, #40, #50 AND #60 VOLTAGE) |
Connect an oscilloscope to terminals #10 to #60 and E1 of the E3, E4 and E5 ECM harness side connectors.
With the engine cranking or idling, check the signal waveform.
- Standard:
- Signal waveform appears as shown in the illustration.
| ECM Terminal Name | CH1: #10 (E3-15) - E1 (E4-7) CH1: #20 (E5-17) - E1 (E4-7) CH1: #30 (E3-14) - E1 (E4-7) CH1: #40 (E5-16) - E1 (E4-7) CH1: #50 (E3-13) - E1 (E4-7) CH1: #60 (E5-15) - E1 (E4-7) |
| Tester Range | 20 V/DIV., 20 ms./DIV. |
| Condition | Idling after warming up engine |
- HINT:
- Check the waveform before the ECM detects the DTC(s) and enters the fail-safe mode, because the ECM will no more indicate the output voltage once it enters the fail-safe mode.
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| OK | |
| 5.CHECK ECM (INJF VOLTAGE) |
Connect an oscilloscope to terminals INJF and E1 of the E6 and E7 ECM harness side connectors.
With the engine cranking or idling, check the signal waveform.
- Standard voltage:
- Signal waveform appears as shown in the illustration.
| ECM Terminal Name | CH2: INJF (E6-26) - E1 (E4-7) |
| Tester Range | 20 V/DIV., 20 ms./DIV. |
| Condition | Idling after warming up engine |
- HINT:
- Check the waveform before the ECM detects the DTC(s) and enters the fail-safe mode, because the injector driver (EDU) will no more indicate the output voltage once it enters the fail-safe mode.
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| OK | ||
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| 6.INSPECT FUEL INJECTOR (RESISTANCE) |
Check the resistance of the fuel injector .
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| OK | ||
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