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Diagnostic Trouble Code: B0188
Diagnostic Trouble Code Name: Right Solar Load Sensor 2 Circuit
Vehicle Make: Vauxhall
Vehicle Model: VXR8 (VE)
Diagnostic Code Entered By: ZerOne
Diagnostic Code Entered On: Wed Oct 06, 2010 11:00 pm
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Please Note: The DTC Information provided has been randomly generated.
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Diagnostic Trouble Code Description:
Control Module Power Relay Feedback Circuit Low Voltage
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTCP0685, P0689, or P0690
Circuit / System Description
The engine control relay is a normally open relay. The relay armature is held in the open position by spring tension. Battery positive voltage is supplied directly to the relay coil and the armature contact at all times. The engine control module (ECM) supplies the ground path to the relay coil control circuit via an internal integrated circuit called an output driver module (ODM). The ODM output control is configured to operate as a low side driver for the engine control relay. The ODM for the engine control relay also incorporates a fault detection circuit, which is continuously monitored by the ECM. When the ECM commands the engine control relay ON, ignition?1 voltage is supplied to the following fuses in the underhood fuse block:
The Engine Sensor Fuse
The Auto Trans Fuse
The INJ/IGN Fuse, for the even bank cylinders
The INJ/IGN Fuse, for the odd bank cylinders
The ignition?1 voltage that is supplied to the ECM through the Engine Sensor fuse, provides power to the internal ECM circuits associated with the throttle actuator control (TAC) operation. The ECM also monitors the voltage level on the ignition?1 voltage circuit to confirm that the engine control relay contacts have closed.
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