Ford Ranger EV (2001 year). Manual - part 86

412-03-11

412-03-11

Air Conditioning

DIAGNOSIS AND TESTING (Continued)

PINPOINT TEST F: A/C COMPRESSOR DOES NOT OPERATE (NO COOLING)

TEST STEP

ACTION TO TAKE

•

With key OFF, disconnect IAA module from BOB; leave BOB

Yes =

REPLACE the IAA module.

connected to IAA module C1945. 

REFER to 

 Section 412-04

.

•

With key OFF, disconnect A/C inverter motor controller (IMC) C1947

No =

REPAIR the R/PK wire.

and measure the resistance between BOB pin 46 and ground (BOB pin

80). 

•

Is the resistance greater than 10,000 ohms?

F9 CHECK CIRCUIT 3026 (R/PK) FOR OPEN

•

With key OFF, disconnect A/C inverter motor controller (IMC) C1947

Yes =

GO to F10.

and measure the resistance of the R/PK wire between pin 8 on A/C IMC

C1947 and BOB pin 46. 

•

Is the resistance less than 5 ohms?

No =

REPAIR the R/PK wire.

F10 CHECK HIGH-VOLTAGE POWER TO A/C IMC

•

Disconnect the 12-volt auxiliary battery negative cable. 

Yes =

REPLACE the A/C IMC.

•

Remove the high-voltage power distribution box (HVPDB) cover. 

No =

GO to F11.

WARNING: The following test steps contain high-voltage

procedures. High-voltage insulated safety gloves and face shield must

be worn when performing the following steps. Failure to follow this

warning may result in severe personal injury or  death.

•

Disconnect HVPDB A/C IMC high-voltage C1917F. 

•

Reinstall the HVPDB cover. 

•

Reconnect the 12-volt auxiliary battery negative cable. 

•

With key ON, measure the voltage between circuit 3150 (DB wire) and

circuit 3151 (W wire) on HVPDB A/C IMC high-voltage C1917. 

•

Is the voltage greater than 300 volts?

F11 CHECK HIGH-VOLTAGE FUSE

•

With key OFF, disconnect the 12-volt auxiliary battery negative cable. 

Yes =

REPLACE the 25A A/C

fuse. GO to F12.

•

Disconnect high-voltage auxiliary load in-line C1935 on the traction

No =

REPLACE the HVPDB.

battery support tray. 

REFER to 

 Section 414-03A

•

Disconnect all HVPDB high-voltage connectors. 

 or 

 Section 414-03B

.

•

Disconnect power steering assembly high-voltage C1895. 

•

Measure the resistance of the 25A A/C fuse. 

•

Is the resistance greater than 1,000 ohms?

F12 CHECK A/C IMC FOR SHORT

•

Connect the Capacitor Discharge Tool to the digital volt/ohmeter

Yes =

REPLACE the A/C IMC.

(DVOM) and set the DVOM to volts. 

•

Connect the probes of the Capacitor Discharge Tool to circuit 3150 (DB

No =

GO to F13.

wire) and circuit 3151 (W wire) on HVPDB A/C IMC C1917M and

allow the voltage on the DVOM to discharge to 0 volt. 

•

Measure the resistance between circuit 3150 (DB wire) and circuit 3151

(W wire) on HVPDB A/C IMC C1917M. 

•

Is the resistance less than 30 ohms?

F13 CHECK HVPDB FOR SHORT

•

Measure the resistance between circuit 3150 (DB wire) and circuit 3151

Yes =

GO to F14.

(W wire) on HVPDB A/C IMC high-voltage C1917F. 

•

Is the resistance greater than 10,000 ohms?

No =

REPLACE the HVPDB.

REFER to 

 Section 414-03A

 or 

 Section 414-03B

.

F14 CHECK SYSTEM

(Continued)

412-03-12

412-03-12

Air Conditioning

DIAGNOSIS AND TESTING (Continued)

PINPOINT TEST F: A/C COMPRESSOR DOES NOT OPERATE (NO COOLING)

TEST STEP

ACTION TO TAKE

•

With key OFF, reconnect A/C IMC C1947 and HVPDB A/C IMC

Yes =

REPLACE the A/C IMC.

high-voltage C1917. 

REPLACE the 25A A/C

fuse. REFER to 

 Section

414-03A 

 or 

 Section

414-03B

.

•

With key ON, set the mode select knob to the A/C position, the

No =

System OK.

temperature control knob to full cool position, and the blower control

knob to HIGH speed position. 

•

Does the 25A A/C high-voltage fuse fail again?

REMOVAL AND INSTALLATION

A/C Compressor

Removal

1. Disconnect the traction battery auxiliary load

high-voltage connector. Refer to 

 Section

100-05

.

2. Evacuate the A/C system. For additional

information, refer to Section 412-00 of the
2001 Ranger Workshop Manual.

3. Remove the electric cooling fan.

1 Release the coolant hose from the clips.
2 Remove the bolts.
3 Disconnect the electrical connector.
4 Remove the fan.

4. Raise and support the vehicle. For additional

information, refer to 

 Section 100-02

.

412-03-13

412-03-13

Air Conditioning

REMOVAL AND INSTALLATION (Continued)

5. NOTE: The low-voltage electrical connector is

shown, the high-voltage electrical connector is
behind the A/C compressor. 
Disconnect the low and the high-voltage
electrical connectors at the A/C compressor.

6. Disconnect the traction battery charger electrical

connectors.

7. Remove the low side A/C line bolts.

8. Remove the high side A/C line bolts.

412-03-14

412-03-14

Air Conditioning

REMOVAL AND INSTALLATION (Continued)

9. NOTE: If the isometric bracket for the

compressor is excessively deteriorated, replace
it during compressor removal and installation. 
Remove the four A/C compressor bolts.

10. Lower the vehicle.

11. Remove the A/C compressor.

•

Carefully feed the compressor electrical wire
down with the compressor.

Installation

1.

CAUTION: The compressor uses

Polyolester oil meeting Ford specification
WSS-M2C31-B. This oil is not compatible
with any other A/C oil. 
If the service compressor has no warning
tag/label, then it has a full production (system)
charge of oil (170 cc) and the following steps
must be followed.
1 Flush the A/C system to remove all existing

oil.

2 Replace the accumulator.
3 Install the compressor.

2. If the service compressor has a warning

tag/label, then it has no oil charge and 30 cc of
Polyolester oil meeting Ford specification
WSS-M2C31-B must be added to the system
after compressor installation.

3.

CAUTION: Do not add any leak

detection dye to the A/C system. 
To install, reverse the removal procedure.