CHECK COMMUNICATION BETWEEN GTS AND ECM
CHECK MIL (THROTTLE BODY WITH MOTOR ASSEMBLY)
CHECK MIL (ACCELERATOR PEDAL SENSOR ASSEMBLY)
CHECK MIL (VVT SENSOR FOR INTAKE SIDE OF BANK 1)
CHECK MIL (VVT SENSOR FOR INTAKE SIDE OF BANK 2)
CHECK MIL (VVT SENSOR FOR EXHAUST SIDE OF BANK 1)
CHECK MIL (VVT SENSOR FOR EXHAUST SIDE OF BANK 2)
CHECK MIL (POWER STEERING OIL PRESSURE SWITCH)
CHECK MIL (EMISSION CONTROL VALVE SET)
CHECK MIL (NO. 2 EMISSION CONTROL VALVE SET)
SFI SYSTEM - VC Output Circuit |
DESCRIPTION
The ECM constantly generates 5 V of power from the battery voltages supplied to the +B (BATT) terminal to operate the microprocessor. The ECM also provides this power to the sensors through the VC output circuit.
When the VC circuit is short-circuited, the microprocessor in the ECM and sensors that are supplied with power through the VC circuit are inactivated because the power is not supplied from the VC circuit. Under this condition, the system does not start up and the MIL does not illuminate even if the system malfunctions.
- HINT:
- Under normal conditions, the MIL is illuminated for several seconds when the engine switch is first turned to on (IG). The MIL goes off when the engine is started.
WIRING DIAGRAM
- for Automatic Transmission
- for Manual Transmission
INSPECTION PROCEDURE
| 1.CHECK MIL |
Check that the Malfunction Indicator Lamp (MIL) lights up when turning the engine switch on (IG).
Result Result Proceed to MIL illuminates A MIL does not illuminate B
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| B | |
| 2.CHECK COMMUNICATION BETWEEN GTS AND ECM |
Connect the GTS to the DLC3.
Turn the engine switch on (IG) and GTS on.
Check the communication between the GTS and ECM.
Result Result Proceed to Communication is possible A Communication is not possible B
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| B | |
| 3.CHECK MIL (THROTTLE BODY WITH MOTOR ASSEMBLY) |
Disconnect the throttle body with motor assembly connector.
Turn the engine switch on (IG).
Check the MIL.
Result Result Proceed to MIL illuminates A MIL does not illuminate B
Reconnect the throttle body with motor assembly connector.
- HINT:
- for Automatic Transmission
- Perform "Inspection After Repair" after replacing the throttle body with motor assembly (LandCruiser RM000004NJC03SX.html).
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| B | |
| 4.CHECK MIL (ACCELERATOR PEDAL SENSOR ASSEMBLY) |
Disconnect the accelerator pedal sensor assembly connector.
Turn the engine switch on (IG).
Check the MIL.
Result Result Proceed to MIL illuminates A MIL does not illuminate B
Reconnect the accelerator pedal sensor assembly connector.
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| B | |
| 5.CHECK MIL (VVT SENSOR FOR INTAKE SIDE OF BANK 1) |
Disconnect the VVT sensor (for Intake Side of Bank 1) connector.
Turn the engine switch on (IG).
Check the MIL.
Result Result Proceed to MIL illuminates A MIL does not illuminate B
Reconnect the VVT sensor (for Intake Side of Bank 1) connector.
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| B | |
| 6.CHECK MIL (VVT SENSOR FOR INTAKE SIDE OF BANK 2) |
Disconnect the VVT sensor (for Intake Side of Bank 2) connector.
Turn the engine switch on (IG).
Check the MIL.
Result Result Proceed to MIL illuminates A MIL does not illuminate B
Reconnect the VVT sensor (for Intake Side of Bank 2) connector.
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| B | |
| 7.CHECK MIL (VVT SENSOR FOR EXHAUST SIDE OF BANK 1) |
Disconnect the VVT sensor (for Exhaust Side of Bank 1) connector.
Turn the engine switch on (IG).
Check the MIL.
Result Result Proceed to MIL illuminates A MIL does not illuminate B
Reconnect the VVT sensor (for Exhaust Side of Bank 1) connector.
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| B | |
| 8.CHECK MIL (VVT SENSOR FOR EXHAUST SIDE OF BANK 2) |
Disconnect the VVT sensor (for Exhaust Side of Bank 2) connector.
Turn the engine switch on (IG).
Check the MIL.
Result Result Proceed to MIL illuminates A MIL does not illuminate B
Reconnect the VVT sensor (for Exhaust Side of Bank 2) connector.
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| B | |
| 9.CHECK MIL (POWER STEERING OIL PRESSURE SWITCH) |
Disconnect the power steering oil pressure switch connector.
Turn the engine switch on (IG).
Check the MIL.
Result Result Proceed to MIL illuminates A MIL does not illuminate (for Automatic Transmission) B MIL does not illuminate (for Manual Transmission) C
Reconnect the power steering oil pressure switch connector.
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| B | |
| 10.CHECK MIL (EMISSION CONTROL VALVE SET) |
Disconnect the emission control valve set connector.
Turn the engine switch on (IG).
Check the MIL.
Result Result Proceed to MIL illuminates A MIL does not illuminate B
Reconnect the emission control valve set connector.
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| B | |
| 11.CHECK MIL (NO. 2 EMISSION CONTROL VALVE SET) |
Disconnect the No. 2 emission control valve set connector.
Turn the engine switch on (IG).
Check the MIL.
Result Result Proceed to MIL illuminates A MIL does not illuminate B
Reconnect the No. 2 emission control valve set connector.
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| B | |
| 12.CHECK HARNESS AND CONNECTOR |
Disconnect the throttle body with motor assembly connector.
Disconnect the accelerator pedal position sensor connector.
Disconnect the VVT sensor (for Intake Side of Bank 1) connector.
Disconnect the VVT sensor (for Intake Side of Bank 2) connector.
Disconnect the VVT sensor (for Exhaust Side of Bank 1) connector.
Disconnect the VVT sensor (for Exhaust Side of Bank 2) connector.
Disconnect the emission control valve set connector.
Disconnect the No. 2 emission control valve set connector.
Disconnect the power steering oil pressure switch connector.
Disconnect the ECM connectors.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition G56-6 (VCPA) - Body ground Always 10 kΩ or higher G56-3 (VCP2) - Body ground Always 10 kΩ or higher C36-2 (VCTA) - Body ground Always 10 kΩ or higher C35-13 (VCAP) - Body ground Always 10 kΩ or higher C34-12 (VCV1) - Body ground Always 10 kΩ or higher C34-6 (VCV2) - Body ground Always 10 kΩ or higher
Reconnect the ECM connectors.
Reconnect the throttle body with motor assembly connector.
Reconnect the accelerator pedal position sensor connector.
Reconnect the VVT sensor (for Intake Side of Bank 1) connector.
Reconnect the VVT sensor (for Intake Side of Bank 2) connector.
Reconnect the VVT sensor (for Exhaust Side of Bank 1) connector.
Reconnect the VVT sensor (for Exhaust Side of Bank 2) connector.
Reconnect the emission control valve set connector.
Reconnect the No. 2 emission control valve set connector.
Reconnect the power steering oil pressure switch connector.
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| OK | ||
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| 13.CHECK HARNESS AND CONNECTOR |
Disconnect the throttle body with motor assembly connector.
Disconnect the accelerator pedal position sensor connector.
Disconnect the VVT sensor (for Intake Side of Bank 1) connector.
Disconnect the VVT sensor (for Intake Side of Bank 2) connector.
Disconnect the VVT sensor (for Exhaust Side of Bank 1) connector.
Disconnect the VVT sensor (for Exhaust Side of Bank 2) connector.
Disconnect the power steering oil pressure switch connector.
Disconnect the ECM connectors.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition G56-4 (VCPA) - Body ground Always 10 kΩ or higher G56-2 (VCP2) - Body ground Always 10 kΩ or higher C36-13 (VCTA) - Body ground Always 10 kΩ or higher C34-15 (VCV1) - Body ground Always 10 kΩ or higher C34-16 (VCV2) - Body ground Always 10 kΩ or higher
Reconnect the ECM connectors.
Reconnect the throttle body with motor assembly connector.
Reconnect the accelerator pedal position sensor connector.
Reconnect the VVT sensor (for Intake Side of Bank 1) connector.
Reconnect the VVT sensor (for Intake Side of Bank 2) connector.
Reconnect the VVT sensor (for Exhaust Side of Bank 1) connector.
Reconnect the VVT sensor (for Exhaust Side of Bank 2) connector.
Reconnect the power steering oil pressure switch connector.
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| OK | ||
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