Ford Electric Ranger 2001 Manual page 316

412-02-22
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST K: DTC B2513 BLOWER (FAN) CIRCUIT FAILURE
• Is the resistance greater than 10,000 ohms?
K8 CHECK POWER TO BLOWER MOTOR
• With key OFF, disconnect blower motor C161.
• With key ON, set the mode select knob to the PANEL/FLOOR position
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
motor C161 and pin 4 on VBC C1971.
• Is the resistance less than 5 ohms?
K10 CHECK CIRCUIT 181 (BR/O) FOR OPEN
• With key OFF, remove the blower motor relay from the EVPDB and
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?
K11 CHECK BLOWER MOTOR RELAY CONTROL CIRCUIT
• Enter the IAA module active command mode CLIMATE SYSTEM
CONTROL, set the active command PUMP/VBC to ON, and measure
the resistance between pin 86 on the blower motor relay connector and
ground.
• Is the resistance less than 5 ohms?
K12 CHECK CIRCUIT 3020 (LB) FOR OPEN
• Connect 104-Pin Breakout Box (BOB) to IAA module C1945; leave IAA Yes =
module disconnected.
• With key OFF, measure the resistance of the LB wire between pin 86 on
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
L1 CHECK FOR BLOWER/FAN SYSTEM DIAGNOSTIC TROUBLE
CODES (DTCs)
• Carry out the on-demand self-test for the interface adapter assembly
(IAA) module and check for blower/fan system DTCs.
• Do DTC B2515 Heater Blower Relay Circuit Failure and DTC B2516 No =
Blower Control Circuit Failure also occur?
L2 CHECK BLOWER/FAN SENSE VOLTAGE
• Enter IAA module active command mode CLIMATE SYSTEM
CONTROL, monitor the IAA module PID BFSV, and set the active
command PUMP/VBC to OFF.
• Is the BFSV PID greater than 10 volts?
L3 CHECK BLOWER MOTOR RELAY
• With key OFF, remove the blower motor relay from the electric vehicle
power distribution box (EVPDB) and measure the resistance between
terminals 30 and 87 on the blower motor relay.
• Is the resistance less than 5 ohms?
L4 CHECK CIRCUIT 181 (BR/O) FOR SHORT TO POWER
• With key OFF, disconnect blower motor C161.
(Continued)
Heating and Ventilation
TEST STEP
TEST STEP
ACTION TO TAKE
No = REPAIR the Y/R wire.
GO to K9.
Yes =
No = GO to K10.
Yes = REPLACE the blower
motor.
No = REPAIR the P/W wire.
Yes = GO to K11.
No = REPAIR the BR/O wire.
Yes = REPLACE the blower motor
relay.
GO to K12.
No =
REPLACE the IAA module.
REFER to Section
No = REPAIR the LB wire.
ACTION TO TAKE
Yes = GO to Pinpoint Test N.
GO to L2.
GO to L3.
Yes =
No = System OK. CHECK wiring
for intermittent connections.
Yes = REPLACE the blower motor
relay.
No = GO to L4.
Yes = REPAIR the BR/O wire.
2001 Ranger EV, 01/2001
412-02-22
412-04.