Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - 1VD-FTV ENGINE CONTROL
CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER - ECM)
REPAIR OR REPLACE HARNESS OR CONNECTOR
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
DTC P1626 Idle Signal Output Value Too Low
DTC P1627 Idle Signal Output Value Too High
DTC P1629 Idol Signal Output Value Too Low Bank2
DTC P162A Idol Signal Output Value Too High Bank2
DESCRIPTION
The ECM reduces injector assembly operation speed and applied voltage to the injector assembly to reduce the sound it produces during idling. To do this, the ECM outputs applied voltage switching signals to terminal IJEN of the injector driver from terminal IDLO and IDL2 of the ECM.
| DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
| Warm up the engine and idle it for 5 seconds | With the engine running at idle, voltage of the ECM IDLO or IDL2 terminal is 0.05 V or less for 5 seconds or more (1 trip detection logic). | Open or short in idle control circuit Injector driver ECM |
| DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
| Warm up the engine and idle it for 5 seconds | With the engine running at speeds higher than idle, voltage of the ECM IDLO or IDL2 terminal is 3.4 V or higher for 5 seconds or more (1 trip detection logic). | Open or short in idle control circuit Injector driver ECM |
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- HINT:
- Read freeze frame data using the GTS. 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, and other data from the time the malfunction occurred.
| 1.CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER - ECM) |
Disconnect the No. 1 or No. 2 injector driver connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for LHD Tester Connection Condition Specified Condition C152-7 (IJEN) - C45-59 (IDLO) Always Below 1 Ω C156-7 (IDL2) - C45-58 (IDL2) Always Below 1 Ω C152-7 (IJEN) or C45-59 (IDLO) - Body ground Always 10 kΩ or higher C156-7 (IDL2) or C45-58 (IDL2) - Body ground Always 10 kΩ or higher
- Standard Resistance:
for RHD Tester Connection Condition Specified Condition C152-7 (IJEN) - C46-59 (IDLO) Always Below 1 Ω C156-7 (IDL2) - C46-58 (IDL2) Always Below 1 Ω C152-7 (IJEN) or C46-59 (IDLO) - Body ground Always 10 kΩ or higher C156-7 (IDL2) or C46-58 (IDL2) - Body ground Always 10 kΩ or higher
Reconnect the No. 1 or No. 2 injector driver connector.
Reconnect the ECM connector.
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| OK | |
| 2.REPLACE INJECTOR DRIVER |
Replace the No. 1 injector driver ().
Replace the No. 2 injector driver ().
| NEXT | |
| 3.CHECK ANY OTHER DTCS OUTPUT |
Connect the GTS to the DLC3.
Turn the engine switch on (IG) and turn the GTS on.
Enter the following menus: Engine and ECT / Trouble Codes.
Read the DTCs.
| Result | Proceed to |
| No DTC is output | A |
| P1626 or P1627 is output | B |
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| A | ||
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| 4.REPLACE ECM |
Replace the ECM ().
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| 5.REPAIR OR REPLACE HARNESS OR CONNECTOR |
Repair or replace the harness or connector.
| NEXT | |
| 6.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED |
Connect the GTS to the DLC3.
Clear the DTCs ().
After warming up the engine, idle the engine for 5 seconds or more.
Enter the following menus: Engine and ECT / Trouble Codes.
Confirm that the DTC is not output again.
| NEXT | ||
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