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Diagnosis Procedure
1.CHECK FUSE
  1. Ignition switch OFF.
  2. Check that the following fuse is not blown (open).
    UnitLocationFuse No.Capacity
    A/C compressorIPDM E/R#7110A
Is the fuse blown (open)?
Replace the blown (open) fuse after repairing the affected circuit if a fuse is blown (open).
.
 
2.CHECK ECV POWER SUPPLY CIRCUIT
  1. Disconnect A/C compressor connector.
  2. Ignition switch ON.
  3. Check voltage between A/C compressor harness connector and ground.
    +−Voltage
    (Approx.)
    A/C compressor
    ConnectorTerminal
    F153Ground9 - 16 V
Is the inspection result normal?
.
.
 
3.CHECK ECV POWER SUPPLY CIRCUIT FOR OPEN
  1. Ignition switch OFF.
  2. Disconnect IPDM E/R connector.
  3. Check continuity between A/C compressor harness connector and IPDM E/R harness connector.
    A/C compressorIPDM E/RContinuity
    ConnectorTerminalConnectorTerminal
    F153F3571Existed
Is the inspection result normal?
Replace IPDM E/R. Refer to Removal and Installation.
Repair harness or connector.
 
4.CHECK ECV CONTROL SIGNAL CIRCUIT FOR OPEN
  1. Ignition switch OFF.
  2. Disconnect IPDM E/R connector.
  3. Check continuity between A/C compressor harness connector and IPDM E/R harness connector.
    A/C compressorIPDM E/RContinuity
    ConnectorTerminalConnectorTerminal
    F154F4298Existed
Is the inspection result normal?
.
Repair harness or connector.
 
5.CHECK ECV CONTROL SIGNAL CIRCUIT FOR SHORT
Check continuity between A/C compressor harness connector and ground.
A/C compressor—Continuity
ConnectorTerminal
F154GroundExisted
Is the inspection result normal?
.
Repair harness or connector.
 
6.CHECK ECV
Check ECV. Refer to Component Inspection.
Is the inspection result normal?
Replace IPDM E/R. Refer to Removal and Installation.
Replace A/C compressor. Refer to Removal and Installation.