Ford Ranger EV (2001 year). Manual — part 79
412-02-21
412-02-21
Heating and Ventilation
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST K: DTC B2513 BLOWER (FAN) CIRCUIT FAILURE
TEST STEP
ACTION TO TAKE
K1 RETRIEVE CONTINUOUS DIAGNOSTIC TROUBLE CODES
(DTCs) FROM INTERFACE ADAPTER ASSEMBLY (IAA) MODULE
WHILE IN PANEL/FLOOR MODE
•
With key ON, set the mode select knob to the PANEL/FLOOR position Yes = GO to
and the temperature control knob to the full warm position.
•
Wait approximately 45 seconds and retrieve continuous DTCs from the
No =
GO to K2.
IAA module.
•
Do DTC B2516 Blower Control Circuit Failure and DTC C1776
Heater System Failure occur?
K2 CHECK BLOWER/FAN STATUS
•
With key ON, set the mode select knob to the PANEL/FLOOR position
Yes =
System OK. CHECK wiring
and monitor the IAA module PIDs BLOWER and BFSV while rotating
for intermittent connections.
the blower control knob through all the blower speed positions and verify
the voltages below:
— LOW = 9.8-10.4 volts
— MED
1 = 6.8-7.4 volts
— MED
2 = 3.9-4.5 volts
— HIGH = 1.4-2.1 volts
•
Are the voltages correct?
No =
GO to K3.
K3 CHECK FUSE AND POWER TO BLOWER MOTOR RELAY
•
Check 40A fuse 21 in the electric vehicle power distribution box
Yes =
RECONNECT the blower
(EVPDB).
motor relay. GO to K4.
•
With key OFF, remove the blower motor relay from the EVPDB and
No =
REPAIR as necessary.
measure the voltage between pins 85, 87 on the blower motor relay
connector and ground. (V > 10 volts)
•
Is everything OK?
K4 CHECK BLOWER MOTOR
•
With key OFF, disconnect VBC C1971.
Yes =
GO to K5.
•
With key ON, set the mode select knob to the PANEL/FLOOR position
No =
and connect a jumper wire between pin 4 (P/W wire) on VBC C1971
and ground.
•
Does the blower motor operate?
K5 CHECK VBC FEEDBACK SIGNAL
•
With key OFF, reconnect VBC C1971.
Yes =
REPLACE the IAA module.
REFER to
•
Connect 104-Pin Breakout Box (BOB) to IAA module and IAA module
No =
GO to K6.
C1945.
NOTE: The mode select knob must be in the OFF position when carrying
out this test step.
•
With key ON, set the mode select knob to the OFF position and measure
the voltage between BOB pin 64 and ground (BOB pin 80).
•
Is the voltage greater than 10 volts?
K6 CHECK CIRCUIT 148 (Y/R) FOR OPEN
•
With key OFF, disconnect BOB from the IAA module; leave BOB
Yes =
GO to K7.
connected to IAA module C1945.
•
With key OFF, disconnect VBC C1971 and measure the resistance of the No =
REPAIR the Y/R wire.
Y/R wire between pin 1 on VBC C1971 and BOB pin 64.
•
Is the resistance less than 5 ohms?
K7 CHECK CIRCUIT 148 (Y/R) FOR SHORT TO GROUND
•
With key OFF, measure the resistance between BOB pin 64 and ground
Yes =
REPLACE the VBC.
(BOB pin 80).
REFER to
(Continued)
412-02-22
412-02-22
Heating and Ventilation
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST K: DTC B2513 BLOWER (FAN) CIRCUIT FAILURE
TEST STEP
ACTION TO TAKE
•
Is the resistance greater than 10,000 ohms?
No =
REPAIR the Y/R wire.
K8 CHECK POWER TO BLOWER MOTOR
•
With key OFF, disconnect blower motor C161.
Yes =
GO to K9.
•
With key ON, set the mode select knob to the PANEL/FLOOR position
No =
GO to K10.
and measure the voltage between the BR/O wire on blower motor C161
and ground.
•
Is the voltage greater than 10 volts?
K9 CHECK CIRCUIT 758 (P/W) FOR OPEN
•
With key OFF, measure the resistance of the P/W wire between blower
Yes =
REPLACE the blower
motor C161 and pin 4 on VBC C1971.
motor.
•
Is the resistance less than 5 ohms?
No =
REPAIR the P/W wire.
K10 CHECK CIRCUIT 181 (BR/O) FOR OPEN
•
With key OFF, remove the blower motor relay from the EVPDB and
Yes =
GO to K11.
measure the resistance of the BR/O wire between blower motor C161
and pin 30 on the blower motor relay connector.
•
Is the resistance less than 5 ohms?
No =
REPAIR the BR/O wire.
K11 CHECK BLOWER MOTOR RELAY CONTROL CIRCUIT
•
Enter the IAA module active command mode CLIMATE SYSTEM
Yes =
REPLACE the blower motor
CONTROL, set the active command PUMP/VBC to ON, and measure
relay.
the resistance between pin 86 on the blower motor relay connector and
ground.
•
Is the resistance less than 5 ohms?
No =
GO to K12.
K12 CHECK CIRCUIT 3020 (LB) FOR OPEN
•
Connect 104-Pin Breakout Box (BOB) to IAA module C1945; leave IAA Yes =
REPLACE the IAA module.
module disconnected.
REFER to
•
With key OFF, measure the resistance of the LB wire between pin 86 on
No =
REPAIR the LB wire.
the blower motor relay connector and BOB pin 19.
•
Is the resistance less than 5 ohms?
PINPOINT TEST L: DTC B2514 BLOWER (FAN) CIRCUIT SHORT TO VBAT
TEST STEP
ACTION TO TAKE
L1 CHECK FOR BLOWER/FAN SYSTEM DIAGNOSTIC TROUBLE
CODES (DTCs)
•
Carry out the on-demand self-test for the interface adapter assembly Yes = GO to
(IAA) module and check for blower/fan system DTCs.
•
Do DTC B2515 Heater Blower Relay Circuit Failure and DTC B2516 No =
GO to L2.
Blower Control Circuit Failure also occur?
L2 CHECK BLOWER/FAN SENSE VOLTAGE
•
Enter IAA module active command mode CLIMATE SYSTEM
Yes =
GO to L3.
CONTROL, monitor the IAA module PID BFSV, and set the active
command PUMP/VBC to OFF.
•
Is the BFSV PID greater than 10 volts?
No =
System OK. CHECK wiring
for intermittent connections.
L3 CHECK BLOWER MOTOR RELAY
•
With key OFF, remove the blower motor relay from the electric vehicle
Yes =
REPLACE the blower motor
power distribution box (EVPDB) and measure the resistance between
relay.
terminals 30 and 87 on the blower motor relay.
•
Is the resistance less than 5 ohms?
No =
GO to L4.
L4 CHECK CIRCUIT 181 (BR/O) FOR SHORT TO POWER
•
With key OFF, disconnect blower motor C161.
Yes =
REPAIR the BR/O wire.
(Continued)
412-02-23
412-02-23
Heating and Ventilation
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST L: DTC B2514 BLOWER (FAN) CIRCUIT SHORT TO VBAT
TEST STEP
ACTION TO TAKE
•
With key ON, measure the voltage between pin 30 on the blower motor
No =
GO to L5.
relay connector and ground.
•
Is the voltage greater than 0 volts?
L5 CHECK BLOWER MOTOR RELAY CONTROL CIRCUIT
•
Enter the IAA module active command mode CLIMATE SYSTEM
Yes =
GO to L6.
CONTROL, set the active command PUMP/VBC to OFF, and measure
the resistance between pin 86 on the blower motor relay connector and
ground.
•
Is the resistance less than 5 ohms?
No =
System OK. CHECK wiring
for intermittent connections.
L6 CHECK CIRCUIT 3020 (LB) FOR SHORT TO GROUND
•
Connect 104-Pin Breakout Box (BOB) to IAA module C1945; leave IAA Yes =
REPLACE the IAA module.
module disconnected.
REFER to
•
With key OFF, measure the resistance between BOB pin 19 and ground
No =
REPAIR the LB wire.
(BOB pin 80).
•
Is the resistance greater than 10,000 ohms?
PINPOINT TEST M: DTC B2515 HEATER BLOWER RELAY CIRCUIT FAILURE
TEST STEP
ACTION TO TAKE
M1 CHECK FOR BLOWER/FAN SYSTEM DIAGNOSTIC TROUBLE
CODES (DTCs)
•
Carry out the on-demand self-test for the interface adapter assembly Yes = GO to
(IAA) module and check for blower/fan system DTCs.
•
Do DTC B2514 Blower (Fan) Circuit Short to Vbat and/or DTC
No =
GO to M2.
B2516 Blower Control Circuit Failure also occur?
M2 CHECK POWER TO VARIABLE BLOWER CONTROLLER
(VBC)
•
With key OFF, disconnect VBC C1971.
Yes =
REPLACE the VBC.
•
With key ON, measure the voltage between pin 3 (R wire) on VBC
No =
GO to M3.
C1971 and ground.
•
Is the voltage greater than 10 volts?
M3 CHECK CIRCUIT 361 (R) FOR OPEN
•
Connect 104-Pin Breakout Box (BOB) to IAA module C1945; leave IAA Yes =
GO to M4.
module disconnected.
•
With key OFF, measure the resistance of the R wire between pin 3 on
No =
REPAIR the R wire.
VBC C1971 and BOB pin 38.
•
Is the resistance less than 5 ohms?
M4 CHECK CIRCUIT 361 (R) FOR SHORT TO POWER
•
With key ON, measure the voltage between BOB pin 38 and ground
Yes =
REPAIR the R wire.
(BOB pin 80).
•
Is the voltage greater than 0 volts?
No =
REPLACE the IAA module.
REFER to
PINPOINT TEST N: DTC B2516 BLOWER CONTROL CIRCUIT FAILURE
TEST STEP
ACTION TO TAKE
N1 CHECK FOR BLOWER/FAN SYSTEM DIAGNOSTIC TROUBLE
CODES (DTCs)
•
Carry out the on-demand self-test for the interface adapter assembly
Yes =
(IAA) module and check for blower/fan system DTCs.
(Continued)
412-02-24
412-02-24
Heating and Ventilation
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST N: DTC B2516 BLOWER CONTROL CIRCUIT FAILURE
TEST STEP
ACTION TO TAKE
If both DTC B2514 and
DTC B2515, GO to N3.
•
Do DTC B2514 Blower (Fan) Circuit Short to Vbat and/or DTC
No =
GO to N5.
B2515 Heater Blower Relay Circuit Failure also occur?
N2 CHECK GROUND TO VARIABLE BLOWER CONTROLLER
(VBC)
•
With key OFF, disconnect VBC C1971 and measure the resistance
Yes =
REPLACE the VBC.
between pin 5 (BK wire) on VBC C1971 and ground.
•
Is the resistance less than 5 ohms?
No =
REPAIR the BK wire.
N3 CHECK VARIABLE BLOWER CONTROLLER (VBC) FEEDBACK
CIRCUIT FOR SHORT TO POWER
•
With key OFF, disconnect VBC C1971.
Yes =
GO to N4.
•
With key ON, measure the voltage between pin 1 (Y/R wire) on VBC
No =
System OK. CHECK wiring
C1971 and ground.
for intermittent connections.
•
Is the voltage greater than 0 volts?
N4 CHECK CIRCUIT 148 (Y/R) FOR SHORT TO POWER
•
Connect 104-Pin Breakout Box (BOB) to IAA module C1945; leave IAA Yes =
REPAIR the Y/R wire.
module disconnected.
•
With key ON, measure the voltage between BOB pin 64 and ground
No =
REPLACE the IAA module.
(BOB pin 80).
REFER to
•
Is the voltage greater than 0 volts?
N5 CHECK BLOWER/FAN STATUS
•
With key ON, set the mode select knob to the PANEL/FLOOR position
Yes =
System OK. CHECK wiring
and monitor the IAA module PIDs BLOWER and BFSV while rotating
for intermittent connections.
the blower control knob through all the blower speed positions and verify
the voltages below:
— LOW = 9.8-10.4 volts
— MED
1 = 6.8-7.4 volts
— MED
2 = 3.9-4.5 volts
— HIGH = 1.4-2.1 volts
•
Are the voltages correct?
No =
GO to N6.
N6 CHECK CIRCUIT 515 (O/R) FOR OPEN
•
Connect 104-Pin Breakout Box (BOB) to interface adapter assembly
Yes =
GO to N7.
(IAA) module C1945; leave IAA module disconnected.
•
With key OFF, disconnect variable blower controller (VBC) C1971 and
No =
REPAIR the O/R wire.
measure the resistance of the O/R wire between pin 2 on VBC C1971
and BOB pin 5.
•
Is the resistance less than 5 ohms?
N7 CHECK CIRCUIT 515 (O/R) FOR SHORT TO GROUND
•
With key OFF, measure the resistance between BOB pin 5 and ground
Yes =
GO to N8.
(BOB pin 80).
•
Is the resistance greater than 10,000 ohms?
No =
REPAIR the O/R wire.
N8 CHECK CIRCUIT 515 (O/R) FOR SHORT TO POWER
•
With key ON, measure the voltage between BOB pin 5 and ground
Yes =
REPAIR the O/R wire.
(BOB pin 80).
•
Is the voltage greater than 0 volts?
No =
REPLACE the VBC.
REFER to
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