DTC P06B1: Sensor Power Supply "A" Circuit Low: Notes
DTC detecting condition:
Immediately at fault recognition
Trouble symptom:
Improper idling
Wiring diagram:
Engine Electrical System Ref. to WIRING SYSTEM>ENGINE ELECTRICAL SYSTEM .
CAUTION:
Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD
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NOTE:
After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE
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- CHECK HARNESS BETWEEN ECM AND ACCELERATOR PEDAL POSITION SENSOR CONNECTOR (SHORT TO GROUND)
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- Turn the ignition switch to OFF.
- Disconnect the connector from ECM.
- Disconnect the connector from the accelerator pedal position sensor.
- Measure the resistance between the ECM connector and engine ground.
Connector & terminal
(B134) No. 51 - Engine ground:
Is the resistance 1 MΩ or more?
Yes: Go to 2.
No: Repair the short circuit to ground in harness between ECM connector and accelerator pedal position sensor connector.
- CHECK HARNESS BETWEEN ECM AND EACH SENSOR CONNECTOR (SHORT TO GROUND)
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- Disconnect the connector from the manifold absolute pressure and intake air temperature sensor.
- Disconnect the connector from tumble generator valve actuator RH.
- Disconnect the connector from tumble generator valve actuator LH.
- Measure the resistance between the ECM connector and engine ground.
Connector & terminal
(E158) No. 1 - Engine ground:
Is the resistance 1 MΩ or more?
Yes: Replace the ECM. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>ENGINE CONTROL MODULE (ECM) .
No: Repair the short circuit to ground in harness between the ECM connector and the following sensor connector.
- Manifold absolute pressure and intake air temperature sensor
- Tumble generator valve actuator RH
- Tumble generator valve actuator LH