Ford 2001 Ranger, Manual

Page: 248 / 1218

303-14-5 303-14-5 Electric Motor Management
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST A: DTC C1854 MOTOR TEMPERATURE OUT OF RANGE
TEST STEP ACTION TO TAKE
•
With key OFF, measure the resistance of the Y/LG wire between pin 8 Yes = Transaxle temp sensor is
on in-line C2999 and BOB pin 35. OPEN.
•
Is the voltage between circuit 3708 (BR) and circuit 3757 (BK/W)
between 4.9 and 5.0V and is the MIL and the Power Limit light on?
No = REPLACE the transaxle
A8 CHECK FOR TRANSAXLE TEMP SENSOR SHORT TO GROUND
•
Disconnect connector C4993 from the transaxle. Yes = REPLACE the TIM.
•
Does the voltage remain at 0V?
No = REPLACE the transaxle.
PINPOINT TEST B: DTC 1856 TRACTION MOTOR ENCODER CIRCUIT FAILURE
TEST STEP ACTION TO TAKE
B1 CHECK VEHICLE SPEED SENSORS
•
With key OFF. Disconnect motor/transaxle C4993. Yes = GO to B2.
•
Connect Electric Motor/Transaxle Test Box to the motor/transaxle and
cigar lighter socket.
•
Place the gear selector in the NEUTRAL position and raise the vehicle No = REPLACE the
on a hoist. motor/transaxle. REFER to
•
Set the vehicle speed sensor power switch on the test box to the ON Section 303-01 .
position and manually rotate the rear wheels.
•
Do the channel A and B LEDS on the test box blink alternately as
the wheels rotate?
B2 CHECK VEHICLE SPEED SENSORS REFERENCE VOLTAGE
•
Key OFF. Yes = GO to B3.
•
Connect 104-pin Breakout Box (BOB) to traction inverter module (TIM)
and TIM C4998, C4999 using the BCM/TIM BOB Adapter Cable and
Overlay.
•
With key ON, measure the voltage between BOB pin A30 and ground
(BOB pin A29).
•
Is the voltage greater than 10 volts?
No = REPLACE the TIM.
B3 CHECK CIRCUITS 3707 (O), 3659 (BK/PK), 3700 (LB/R), AND
3701 (DB/W) FOR OPEN(S)
•
With key OFF, disconnect the TIM from the BOB; leave BOB connected Yes = GO to B4.
to TIM C4998, C4999.
•
With key OFF, measure the resistance of the (O) wire between pin 8 on
the motor/transaxle C4993 and BOB pin A30.
•
With key OFF, measure the resistance of the (BK/PK) wire between pin
9 on the motor/transaxle C4993 and BOB pin A40.
•
With key OFF, measure the resistance of the (LB/R) wire between pin 4
on the motor/transaxle C4993 and BOB pin A36.
•
With key OFF, measure the resistance of the (DB/W) wire between pin 1
on the motor/transaxle C4993 and BOB pin A26.
•
Is the voltage greater than 0 volts?
No = REPAIR the wire(s) in
question.
B4 CHECK CIRCUITS 3700 (LB/R) AND 3701 (DB/W) FOR SHORT(S)
TO GROUND
•
With key OFF, measure the resistance between BOB pins A26, A36 and Yes = GO to B5.
ground (BOB pin A29).
•
Are the resistances greater than 10,000 ohms?
No = REPAIR the wire(s) in
question.
(Continued)
2001 Ranger EV, 01/2001