P0A4B

P112 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0A4B-253: Generator Position Sensor Circuit

DTC P0A4B-253 - Generator Position Sensor Circuit

DTC P0A4C-513 - Generator Position Sensor Circuit Range / Performance

DTC P0A4D-255 - Generator Position Sensor Circuit Low

DESCRIPTION

The generator resolver detects the position of the magnetic poles, which are indispensable for ensuring the highly efficient control of the MG1 and MG2. The construction of the generator resolver and how it is connected to the HV control ECU are the same as those of the motor resolver (P0A3F).





MONITOR DESCRIPTION

The HV control ECU monitors the generator resolver output signal. If the HV control ECU detects output signals that are out of the normal range or specification, it will conclude that there is a malfunction of the generator resolver. The HV control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - GENERATOR RESOLVER)





(a) Disconnect the H17 HV control ECU connector.





(b) Disconnect the M5 generator resolver connector.
(c) Turn the power switch ON (IG).
(d) Measure the voltage between the terminals of the HV control ECU connector and body ground.
Standard voltage:





(e) Turn the power switch OFF.
(f) Measure the resistance between the wire harness side connectors.
Standard resistance (Check for open):






Standard resistance (Check for short)






(g) Reconnect the generator resolver connector.
(h) Reconnect the HV control ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. INSPECT GENERATOR RESOLVER
(a) Disconnect the M5 generator resolver connector.





(b) Measure the resistance between the terminals of the generator resolver.
Standard resistance:





(c) Using a megohmmeter, measure the insulation resistance between the terminals of the generator resolver.
Standard resistance:





NG -- REPLACE HYBRID VEHICLE GENERATOR ASSEMBLY
OK -- REPLACE HYBRID VEHICLE CONTROL ECU