A/C compressor not engaging after SYNC 3.0 → 3.4 APIM replacement

Interface:
Type: FTDI #1:D39RKNFE, 3000000 bps
Adapter: vLinker FS v2.3.04 MIC3322 V2.3.04 (ELM327 v2.3)
Min.delay: 3 ms ( Excellent)
Errors: None

Vehicle:
Model: Ford Kuga/Escape
Engine: EcoBoost Gasoline Turbocharged Direct Injection
Capacity: 1.5L
Year: 2017
Month: 05
Generation: 2017 MY
Fuel: Gasoline
Transmission gear: Manual
SYNC version: SYNC 3
VIN: WF0AXXWPMAHB62548

PCM - Powertrain Control Module
Part number: HV4A-12A650-JA
Calibration level: HV4A-12A650-AHH
Strategy : HV4A-14C204-AHH
Hardware type: FV6A-12B684-BB
VIN: WF0AXXWPMAHB62548
Total Distance: 65530.0 km

OBDII - On Board Diagnostic II
VIN: WF0AXXWPMAHB62548

APIM - Accessory Protocol Interface Module
Part number: GJ5T-14G371-BFC
Calibration level: GJ5T-14G371-BJT
Strategy : GB5T-14G374-AF
VIN: WF0AXXWPMAHB62548

SASM - Steering Angle Sensor Module
Part number: F1FT-3F818-BC
Calibration level: F1FT-3F818-BC
Strategy : F1FT-14C309-AC
Total Distance: 65530.0 km

ABS - Antilock braking system
Part number: GV61-2C405-CH
Calibration level: GV61-2C405-CH (latest known: GV61-2C405-CJ)
Strategy : GV61-14C036-CH
VIN: WF0AXXWPMAHB62548
Total Distance: 65530.0 km

RCM - Restraint Control Module
Part number: GV4T-14B321-AB
Calibration level: GV4T-14B321-AB (latest known: GV4T-14B321-AC)
Strategy : GJ5T-14C028-BA
Calibration: GV4T-14C098-CB
VIN: WF0AXXWPMAHB62548

PAM - Parking Aid Module
Part number: F1ET-15K866-AH
Calibration level: F1ET-15K866-AH (latest known: F1ET-15K866-AJ)
Strategy : F1ET-14C090-AG

PSCM - Power Steering Control Module
Part number: CV61-3C579-AZ
Calibration level: CV61-3C579-AZ
Strategy : CV6T-14C217-AR
Calibration: CV6T-14C218-AX
VIN: WF0AXXWPMAHB62548
Total Distance: 65530.0 km

BdyCM - Body Control Module
Part number: GV6T-14A073-EF
Calibration level: GV6T-14A073-EF
Strategy : JV6T-14C094-AE
Calibration: JV6T-14C095-AB
VIN: WF0AXXWPMAHB62548
Total Distance: 65530.0 km

FCIM - Front Controls Interface Module
Part number: F1CT-18K811-HC
Calibration level: F1CT-18K811-HC
Strategy : F1CT-14F565-HC

PDM - Passengers Door Control Unit
Part number: F1ET-14B533-BG
Calibration level: F1ET-14B533-BG
Strategy : F1ET-14C108-AG
Total Distance: 65530.0 km

DDM - Drivers Door Module
Part number: F1ET-14B531-BG
Calibration level: F1ET-14B531-BG
Strategy : F1ET-14C064-AG
Total Distance: 65530.0 km

HVAC - Heating Ventilation Air Conditioning
Part number: GJ5T-18C612-DG
Calibration level: GJ5T-18C612-DG
Strategy : GJ5T-18D619-AK

RFA - Remote Function Actuator
Part number: F1CT-19G481-AJ
Calibration level: F1CT-19G481-AJ (latest known: F1CT-19G481-AL)
Strategy : F1FT-14C104-AL
Calibration: F1FT-14C105-AH
VIN: WF0AXXWPMAHB62548
Total Distance: 65530.0 km

ACM - Audio Control Module
Part number: CV4T-19C107-LJ
Calibration level: CV4T-19C107-LK
Strategy : CV4T-14D099-LK
Calibration: CV4T-14D100-LE

IPC - Instrument Panel Control Module
Part number: GV4T-10849-JL
Calibration level: GV4T-10849-JN
Strategy : GJ5T-14C026-BN
Calibration: GJ5T-14C088-DJ
VIN: WF0AXXWPMAHB62548
Odometer: 65530.3 km
Total Distance: 65530.0 km

Interface:
Type: FTDI #1:D39RKNFE, 3000000 bps
Adapter: vLinker FS v2.3.04 MIC3322 V2.3.04 (ELM327 v2.3)
Min.delay: 3 ms ( Excellent)
Errors: None

Vehicle:
Model: Ford Kuga/Escape
Engine: EcoBoost Gasoline Turbocharged Direct Injection
Capacity: 1.5L
Year: 2017
Month: 05
Generation: 2017 MY
Fuel: Gasoline
Transmission gear: Manual
SYNC version: SYNC 3
VIN: WF0AXXWPMAHB62548

PCM - Powertrain Control Module
Part number: HV4A-12A650-JA
Calibration level: HV4A-12A650-AHH
Strategy : HV4A-14C204-AHH
Hardware type: FV6A-12B684-BB
VIN: WF0AXXWPMAHB62548
Total Distance: 65530.0 km

OBDII - On Board Diagnostic II
VIN: WF0AXXWPMAHB62548

APIM - Accessory Protocol Interface Module
Part number: GJ5T-14G371-BFC
Calibration level: GJ5T-14G371-BJT
Strategy : GB5T-14G374-AF
VIN: WF0AXXWPMAHB62548

SASM - Steering Angle Sensor Module
Part number: F1FT-3F818-BC
Calibration level: F1FT-3F818-BC
Strategy : F1FT-14C309-AC
Total Distance: 65530.0 km

ABS - Antilock braking system
Part number: GV61-2C405-CH
Calibration level: GV61-2C405-CH (latest known: GV61-2C405-CJ)
Strategy : GV61-14C036-CH
VIN: WF0AXXWPMAHB62548
Total Distance: 65530.0 km

RCM - Restraint Control Module
Part number: GV4T-14B321-AB
Calibration level: GV4T-14B321-AB (latest known: GV4T-14B321-AC)
Strategy : GJ5T-14C028-BA
Calibration: GV4T-14C098-CB
VIN: WF0AXXWPMAHB62548

PAM - Parking Aid Module
Part number: F1ET-15K866-AH
Calibration level: F1ET-15K866-AH (latest known: F1ET-15K866-AJ)
Strategy : F1ET-14C090-AG

PSCM - Power Steering Control Module
Part number: CV61-3C579-AZ
Calibration level: CV61-3C579-AZ
Strategy : CV6T-14C217-AR
Calibration: CV6T-14C218-AX
VIN: WF0AXXWPMAHB62548
Total Distance: 65530.0 km

BdyCM - Body Control Module
Part number: GV6T-14A073-EF
Calibration level: GV6T-14A073-EF
Strategy : JV6T-14C094-AE
Calibration: JV6T-14C095-AB
VIN: WF0AXXWPMAHB62548
Total Distance: 65530.0 km

FCIM - Front Controls Interface Module
Part number: F1CT-18K811-HC
Calibration level: F1CT-18K811-HC
Strategy : F1CT-14F565-HC

PDM - Passengers Door Control Unit
Part number: F1ET-14B533-BG
Calibration level: F1ET-14B533-BG
Strategy : F1ET-14C108-AG
Total Distance: 65530.0 km

DDM - Drivers Door Module
Part number: F1ET-14B531-BG
Calibration level: F1ET-14B531-BG
Strategy : F1ET-14C064-AG
Total Distance: 65530.0 km

HVAC - Heating Ventilation Air Conditioning
Part number: GJ5T-18C612-DG
Calibration level: GJ5T-18C612-DG
Strategy : GJ5T-18D619-AK

RFA - Remote Function Actuator
Part number: F1CT-19G481-AJ
Calibration level: F1CT-19G481-AJ (latest known: F1CT-19G481-AL)
Strategy : F1FT-14C104-AL
Calibration: F1FT-14C105-AH
VIN: WF0AXXWPMAHB62548
Total Distance: 65530.0 km

ACM - Audio Control Module
Part number: CV4T-19C107-LJ
Calibration level: CV4T-19C107-LK
Strategy : CV4T-14D099-LK
Calibration: CV4T-14D100-LE

IPC - Instrument Panel Control Module
Part number: GV4T-10849-JL
Calibration level: GV4T-10849-JN
Strategy : GJ5T-14C026-BN
Calibration: GJ5T-14C088-DJ
VIN: WF0AXXWPMAHB62548
Odometer: 65530.3 km
Total Distance: 65530.0 km

Sounds more like a problem with the FCIM.

The APIM doesn’t have to be connected to engage the HVAC with manual controls, the IPC acts as the gateway.

Post pics and info on the APIM.

True, the APIM is not the issue here.

Apim does not need to be connected for the AC to work at all.

Solved!

The issue turned out to be the BCM (Body Control Module) calibration/strategy.

My BCM was running strategy JV6T-14C094-AE. Based on the advice here, I updated it to JV6T-14C094-AF and the problem was immediately resolved.

Before the update:

  • The A/C compressor would not engage.

  • The system worked only when I manually bridged the A/C relay.

  • Disconnecting the APIM made no difference.

After updating the BCM strategy:

  • The A/C compressor engages normally.

  • The climate control system works as expected.

So in my case, the problem was not the APIM, compressor, pressure sensor, or relay. It was caused by the BCM calibration.

Many thanks to Maxim for pointing me in the right direction. You were absolutely right.

Glad I could help! :slight_smile: