Ford 2001 Ranger, Manual

Page: 631 / 1218

414-03B-28 414-03B-28 High Voltage/Traction Battery — Nickel Metal Hydride
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST A: DTC C1839 LEAKAGE FAULT
TEST STEP ACTION TO TAKE
•
With key OFF, measure the resistance between the DB wire on in-line Yes = CLEAR the BCM DTCs.
C1747F and battery module 25 positive (+) post. DRIVE the vehicle. If the
electrical hazard warning
indicator illuminates and
DTC C1839 still occurs,
REPEAT test steps A1 and
A2. If all PIDs still indicate
NO, REPLACE the BCM.
Otherwise, continue as
indicated.
•
Is the resistance between 28,000 and 34,000 ohms?
No = REPLACE high-voltage
harness (14A280-NC).
A7 CHECK PARALLEL COMBINATION (TB+ AND TB-) OF
CURRENT LEAKAGE RESISTANCE
•
With key ON, monitor BCM PID LEAKRES. Yes = GO to A9.
•
Wait approximately 50 seconds.
•
Does the LEAKRES PID indicate less than 50,000 ohms?
No = GO to A8.
A8 CHECK FOR CURRENT LEAKAGE IN TRACTION BATTERY
CHARGER POSITIVE (+) BUS
•
With key ON, enter BCM active command mode CONTACTOR Yes = GO to A50.
OUTPUT CONTROL, monitor BCM PID , and set the active
command CHARGER to CLOSE.
•
Wait approximately 50 seconds.
•
Does the PID indicate less than 50,000 ohms?
No = GO to A11.
A9 CHECK FOR CURRENT LEAKAGE IN THE HIGH-VOLTAGE
NEGATIVE BUS (TB-)
•
With key ON, monitor BCM PID LKRESB- (current leakage Yes = GO to A29 (leakage is in
measurement between TB- and chassis ground). TB- bus).
•
Wait approximately 50 seconds.
•
Does the LKRESB- PID indicate less than 50,000 ohms?
No = GO to A10.
A10 CHECK FOR CURRENT LEAKAGE IN THE HIGH-VOLTAGE
POSITIVE BUS (TB+)
•
With key ON, monitor BCM PID (current leakage Yes = GO to A43 (leakage is in
measurement between TB+ and chassis ground). TB+ bus).
•
Wait approximately 50 seconds.
•
Does the PID indicate less than 50,000 ohms?
No = GO to A16.
A11 CHECK FOR CURRENT LEAKAGE IN THE TRACTION
MOTOR
•
Raise the vehicle on a hoist. Yes = GO to A14 (leakage is in
TIM or traction motor).
(Continued)
2001 Ranger EV, 01/2001