Ford Electric Ranger 2001 Manual page 637

414-03B-34
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST A: DTC C1839 LEAKAGE FAULT
A39 CHECK FOR CURRENT LEAKAGE IN POSITIVE
TEMPERATURE COEFFICIENT (PTC) HEATER
• With key OFF, disconnect PTC switching module high-voltage C1912.
• With key ON, monitor BCM PID LKRESB-.
• Wait approximately 50 seconds.
• Does the LKRESB- PID indicate less than 50,000 ohms?
A40 CHECK FOR CURRENT LEAKAGE IN PTC SWITCHING
MODULE
• With key OFF, remove the HVPDB cover and disconnect HVPDB
C1920 (to PTC switching module).
• Reinstall the HVPDB cover.
• With key ON, monitor BCM PID LKRESB-.
• Wait approximately 50 seconds.
• Does the LKRESB- PID indicate less than 50,000 ohms?
A41 CHECK FOR CURRENT LEAKAGE IN DC/DC CONVERTER
• With key OFF, remove the HVPDB cover and disconnect HVPDB
C1914 (to DC/DC converter).
• Reinstall the HVPDB cover.
• With key ON, monitor BCM PID LKRESB-.
• Wait approximately 50 seconds.
• Does the LKRESB- PID indicate less than 50,000 ohms?
A42 CHECK FOR CURRENT LEAKAGE IN TRACTION BATTERY
CHARGER
• With key OFF, remove the HVPDB cover and disconnect HVPDB
C1923 (to traction battery charger).
• Reinstall the HVPDB cover.
• With key ON, monitor BCM PID LKRESB-.
• Wait approximately 50 seconds.
• Does the LKRESB- PID indicate less than 50,000 ohms?
A43 CHECK FOR CURRENT LEAKAGE IN HIGH-VOLTAGE
POSITIVE BUS (TB+) (INSIDE TRACTION BATTERY SUPPORT
TRAY)
NOTE: The ignition key must be in the OFF position when carrying out
this test step and you must wait approximately three minutes for the
results.
• With key OFF, monitor BCM PID LKRESB+.
• Wait approximately three minutes.
• Does the LKRESB+ PID indicate less than 50,000 ohms?
A44 CHECK FOR CURRENT LEAKAGE IN THE AUXILIARY
POSITIVE (+) BUS (INSIDE TRACTION BATTERY SUPPORT TRAY)
BETWEEN THE CONTACTOR BOX RELAYS AND TB+
• With key OFF, disconnect high-voltage auxiliary load in-line C1935 on
the traction battery support tray.
(Continued)
High Voltage/Traction Battery — Nickel Metal Hydride
TEST STEP
414-03B-34
ACTION TO TAKE
Yes = GO to A40.
No = REPLACE the PTC heater.
REFER to Section 412-02.
GO to A41.
Yes =
No = REPLACE the PTC
switching module. REFER
to Section 412-02.
Yes = GO to A42.
No = REPLACE the DC/DC
converter. REFER to Section
414-02.
Yes = REPLACE the HVPDB.
No = REPLACE the traction
battery charger.
Yes = GO to A49 (leakage is in
contactor box or battery
module voltage sense lines).
GO to A44 (leakage is in
No =
auxiliary load + bus, TIM,
or traction motor).
GO to A45 (leakage is in
Yes =
TIM or traction motor)
2001 Ranger EV, 01/2001