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NO.23 A/C DOES NOT WORK SUFFICIENTLY [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed))

BME010300000W14

23 | A/C does not work sufficiently.
DESCRIPTION | • A/C compressor magnetic clutch does not engage when A/C switch is turned on.
POSSIBLE CAUSE | • Improper refrigerant charging amount • Open A/C magnetic clutch • Open circuit between A/C relay and A/C magnetic clutch • Poor GND of A/C magnetic clutch • Refrigerant pressure switch is stuck open.
• A/C relay is stuck open.
• Seized A/C compressor
• Open circuit between A/C switch and PCM through both refrigerant pressure switch and A/C amplifier

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | • Connect WDS or equivalent to DLC-2. • Turn ignition switch to ON (Engine OFF). • Retrieve any DTCs. • Is "PASSED" displayed? | Yes | No DTC is displayed: • Go to next step.
No | DTC is displayed: • Go to appropriate DTC test.
2 | • Disconnect A/C compressor connector. • Start engine and turn A/C switch on. • Is there correct voltage at terminal of A/C magnetic clutch connector? Specification Above 10.5 V | Yes | Inspect for GND condition of magnetic clutch on A/C compressor. • If GND condition is normal, inspect for open circuit of magnetic clutch coil.
No | Go to next step.
3 | • Disconnect refrigerant pressure switch connector. • Connect jumper wire between terminals B and C (high and low pressure side) of refrigerant pressure switch connector. • Turn ignition switch to ON (Engine OFF). • Turn A/C switch on and set blower fan at any speed.
• Does A/C work?
Yes
Inspect refrigerant pressure switch operation.
• If switch is normal, go to next step.
No | Inspect for following: • A/C switch is stuck open. • Open circuit between refrigerant pressure switch and PCM terminal 5 • Open circuit of blower motor fan switch and resistor (if blower motor does not operate) • Inspect evaporator temperature sensor and A/C amplifier.
4 | • Remove jumper wire from switch connector. • Reconnect connector to refrigerant pressure switch. • Start engine and turn A/C switch on. • Does fan operate? | Yes | Inspect for following: • A/C relay is stuck open. • Open circuit between A/C relay and PCM terminal 47
No | Inspect following and repair or replace as necessary: • Refrigerant charging amount • A/C compressor for being seized.
5 | • Verify test results.

  - If normal, return to diagnostic index to service any additional symptoms.
  - If malfunction remains, inspect related Service Information and perform repair or diagnosis.

  • If vehicle is repaired, troubleshooting completed.
  • If vehicle is not repaired or additional diagnostic information is not available, replace or reprogram PCM.