Ford Electric Ranger 2001 Manual page 369

413-01-14
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST D: TEMPERATURE GAUGE DOES NOT OPERATE PROPERLY OR ALWAYS INDICATES
H (HOT)
D1 IDENTIFY SYMPTOM
NOTE: Do not carry out the following tests steps if interface adapter
assembly (IAA) module DTC B1834 Gauge Drive Current Fault occurs. If
DTC B1834 occurs, refer to the symptom chart.
• With key ON, identify the symptom.
• Does the temperature gauge indicate H (hot)?
D2 CHECK TEMPERATURE GAUGE
• Enter the interface adapter assembly (IAA) module active command
mode TEMPERATURE GAUGE and set the active command TEMP G
to 30%.
• Does the temperature gauge indicate above the C (cold) mark?
D3 CHECK TEMPERATURE GAUGE FOR CORRECT
TEMPERATURE REGION INDICATION
• Set the active command TEMP G to the following percentages and
verify the temperature gauge operation:
Percentage/Temperature
— 15% = C (cold)
— 35% = Bottom of normal region
— 50% = Midscale
— 65% = Top of normal region
— 75% = H (hot)
• Is the temperature gauge OK?
D4 CHECK INTERFACE ADAPTER ASSEMBLY (IAA) MODULE
• Connect 104-Pin Breakout Box (BOB) to the IAA module and IAA
module C1945.
• With key ON, connect a jumper wire between BOB pins 20 and 75.
• Does the temperature gauge indicate greater than H (hot)?
D5 CHECK CIRCUIT 3406 (DG/LG) FOR OPEN
• With key OFF, disconnect instrument cluster C214 and measure the
resistance of the DG/LG wire between pin 11 on instrument cluster C214
and BOB pin 20.
• Is the resistance less than 5 ohms?
D6 CHECK POWER TO INSTRUMENT CLUSTER
• With key OFF, disconnect instrument cluster C215.
• With key ON, measure the voltage between pin 12 (BK/LG wire) on
instrument cluster C214 and pin 6 (BK/W wire) on instrument cluster
C215.
• Is the voltage greater than 10 volts?
D7 CHECK GROUND TO INSTRUMENT CLUSTER
• With key OFF, measure the resistance between pin 6 (BK/W wire) on
instrument cluster C215 and ground.
• Is the resistance less than 5 ohms?
D8 CHECK CIRCUIT 3406 (DG/LG) FOR SHORT TO POWER
• Connect 104-Pin Breakout Box (BOB) to the IAA module C1945; leave
IAA module disconnected.
• With key ON, measure the voltage between BOB pin 20 and ground
(BOB pin 80).
• Is the voltage greater than 0 volts?
(Continued)
Instrument Cluster
TEST STEP ACTION TO TAKE
GO to D6.
Yes =
No = GO to D2.
GO to D3.
Yes =
GO to D4.
No =
Yes = System OK. CHECK wiring
for intermittent connections.
No = REPLACE the instrument
cluster.
Yes = REPLACE the IAA module.
REFER to Section 412-04.
GO to D5.
No =
Yes = REPLACE the instrument
cluster.
No = REPAIR the DG/LG wire.
GO to D8.
Yes =
No = GO to D7.
Yes = REPAIR circuit 3049
(BK/LG wire).
No = REPAIR the BK/W wire.
Yes = REPAIR the DG/LG wire.
No = GO to D9.
2001 Ranger EV, 01/2001
413-01-14