Dodge Ram Truck 1500-2500-3500. Manual — part 42
DIFFERENTIAL & DRIVELINE
TABLE OF CONTENTS
page
page
DIFFERENTIAL & DRIVELINE - ELECTRICAL
DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DIFFERENTIAL & DRIVELINE - SERVICE
INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . 98
DIFFERENTIAL & DRIVELINE - ELECTRICAL DIAGNOSTICS
TABLE OF CONTENTS
page
page
DIFFERENTIAL & DRIVELINE - ELECTRICAL
DIAGNOSTICS
DIAGNOSIS AND TESTING
C143A - DIFFERENTIAL/LOCKER SELECT
SWITCH PERFORMANCE . . . . . . . . . . . . . . . . 2
C143B-DIFFERENTIAL/LOCKER SELECT
SWITCH CIRCUIT LOW . . . . . . . . . . . . . . . . . . 6
C143C-DIFFERENTIAL/LOCKER SELECT
SWITCH CIRCUIT HIGH . . . . . . . . . . . . . . . . . 10
C1418–FRONT DIFFERENTIAL CONTROL
CIRCUIT HIGH . . . . . . . . . . . . . . . . . . . . . . . . 14
C1419–FRONT DIFFERENTIAL CONTROL
CIRCUIT OPEN . . . . . . . . . . . . . . . . . . . . . . . 18
C141E–REAR DIFFERENTIAL CONTROL
CIRCUIT HIGH . . . . . . . . . . . . . . . . . . . . . . . . 21
C141F–REAR DIFFERENTIAL CONTROL
CIRCUIT OPEN . . . . . . . . . . . . . . . . . . . . . . . 25
C1446-FRONT DIFFERENTIAL RETURN
CIRCUIT LOW . . . . . . . . . . . . . . . . . . . . . . . . 28
C1447-FRONT DIFFERENTIAL RETURN
CIRCUIT HIGH . . . . . . . . . . . . . . . . . . . . . . . . 31
C144A-REAR DIFFERENTIAL RETURN
CIRCUIT LOW . . . . . . . . . . . . . . . . . . . . . . . . 35
C144B-REAR DIFFERENTIAL RETURN
CIRCUIT HIGH . . . . . . . . . . . . . . . . . . . . . . . . 38
C144E-FRONT DIFFERENTIAL POSITION
SENSOR PERFORMANCE . . . . . . . . . . . . . . . 42
C1450-FRONT DIFFERENTIAL POSITION
SENSOR CIRCUIT HIGH . . . . . . . . . . . . . . . . 46
C144F-FRONT DIFFERENTIAL POSITION
SENSOR LOW . . . . . . . . . . . . . . . . . . . . . . . . 50
C1452-REAR DIFFERENTIAL POSITION
SENSOR PERFORMANCE . . . . . . . . . . . . . . . 53
C1453-REAR DIFFERENTIAL POSITION
SENSOR LOW . . . . . . . . . . . . . . . . . . . . . . . . 57
C1454-REAR DIFFERENTIAL POSITION
SENSOR CIRCUIT HIGH . . . . . . . . . . . . . . . . 60
C2111- DIFFERENTIAL POSITION SENSOR
SUPPLY VOLTAGE CIRCUIT LOW . . . . . . . . . 64
C2112-DIFFERENTIAL POSITION SENSOR
SUPPLY VOLTAGE CIRCUIT HIGH . . . . . . . . . 68
C230F-LOCKER/DIFFERENTIAL INDICATOR
SUPPLY CIRCUIT PREFORMANCE . . . . . . . . 72
INDICATOR SUPPLY CIRCUIT LOW . . . . . . . . 76
INDICATOR SUPPLY CIRCUIT HIGH . . . . . . . 80
CONTROL CIRCUIT . . . . . . . . . . . . . . . . . . . . 85
CHECKING FRONT LOCKER SOLENOID
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . 89
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . 93
DIFFERENTIAL & DRIVELINE - ELECTRICAL DIAGNOSTICS
DIAGNOSIS AND TESTING
DR/DH
DIFFERENTIAL & DRIVELINE
3 - 1
C143A - DIFFERENTIAL/LOCKER SELECT SWITCH PERFORMANCE
3 - 2
DIFFERENTIAL & DRIVELINE - ELECTRICAL DIAGNOSTICS
DR/DH
C143A - DIFFERENTIAL/LOCKER SELECT SWITCH PERFORMANCE (CONTINUED)
For a complete wiring diagram Refer to Section 8W
•
When Monitored:
Ignition on.
•
Set Condition:
During switch operation, the FDCM senses the Axle Locker Switch resistance is out of specification.
Possible Causes
SWITCH INTERMITTENT
ALXE LOCKER SWITCH
(T537) LOCKER SWITCH SUPPLY CIRCUIT
(T535) LOCKER SWITCH SENSE CIRCUIT OPEN/HIGH RESISTANCE
FDCM
1.
DTC ACTIVE
CAUTION: Before removing the FDCM harness connector, clean the connector and locking cam area of dirt
and debris. Failure to do so can result in the connector being jammed or damage to the locking cams on
the harness connector or module. Do not force the assist arm when releasing or installing the harness con-
nector.
Turn the ignition on, engine not running
With the DRBIII
T
, read FDCM DTC(s).
Is the DTC active at this time?
Yes
>> Go To 2
No
>> Go To 5
2.
AXLE LOCKER SWITCH OPERATION
NOTE: Before continuing with the below diagnostic test, ensure the FDCM harness connector seal is
installed correctly. Inspect the terminals on both harness connector and the module for damage. Failure to
do so can result in misdiagnoses of the system.
Turn the ignition off.
Disconnect the Axle Locker Switch harness connector.
Remove the Axle Locker Switch.
Measure the resistance on the Axle Locker Switch between the Locker Switch Supply terminal and the Locker
Switch Sense terminal.
The resistance must read as follows for each position of the switch.
•
UNLOCK: 5454 ohms +/- 5%
•
RR: 1940 ohms +/- 5%
•
FR/RR: 1075 ohms +/- 5%
Does the ohmmeter read correctly for each position of the Axle Locker Switch
Yes
>> Go To 3
No
>> Replace the Axle Locker Switch.
Perform FDCM VERIFICATION TEST.
DR/DH
DIFFERENTIAL & DRIVELINE - ELECTRICAL DIAGNOSTICS
3 - 3
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