Pinpoint Test L: DTC P1832:00
Four Wheel Drive (4WD) Systems - Electronic Shift
Pinpoint Tests
Pinpoint Test L: DTC P1832:00
Refer to Wiring Diagram Set 34, Four-Wheel Drive Systems for schematic and connector information. Diagrams By Number
Normal Operation
The vehicle must be engaged into either 4H or 4L mode in order to operate the rear Electronic Locking Differential (ELD). When the switch is engaged to lock the rear differential, a Pulse Width Modulated (PWM) signal is sent to the ELD field coil by the Transfer Case Control Module (TCCM) through circuit CCF31. This signal is a PWM signal which is initially 98% duty cycle to lock the differential and decreases to 40% duty cycle once the differential is locked. If the differential does not lock, the TCCM will continue to send the signal for a set amount of time. If after a set period time the differential does not lock, the TCCM will set this code indicating a problem with the differential.
- DTC P1832:00 (Transfer Case Differential Lock-up Solenoid Circuit Failure: No Sub Type Information) - The TCCM sends a signal to the differential to lock the differential. After several unsuccessful attempts, the TCCM will set this DTC alerting the driver the electronic locking differential is inoperative.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- ELD field coil
PINPOINT TEST L: DTC P1832:00
NOTE: Make sure the battery is fully charged before performing this pinpoint test.
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L1 CHECK FOR DTCs
NOTE: Place the Mode Select Switch (MSS) in 2H prior to carrying out a self-test of the TCCM. This will disable the ELD field coil.
- Ignition ON.
- Set the MSS to 2H.
- Enter the following diagnostic mode on the scan tool: Self Test - TCCM.
- Are any DTCs present?
Yes
If only DTC P1832:00 is retrieved, GO to L2.
For any other DTCs, REFER to the Transfer Case Control Module (TCCM) DTC Chart. Transfer Case Control Module (TCCM) (DTC) Chart
No
IDENTIFY the customer concern and GO to Symptom Chart - Four-Wheel Drive (4WD) System. Symptom Chart - Four-Wheel Drive (4WD) System
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L2 CHECK RESISTANCE OF THE ELD FIELD COIL
- Ignition OFF.
- Disconnect: ELD Field Coil C4359.
- NOTE: If the temperatures are exceptionally high, a higher than normal resistance reading could result. A lower temperature could result in a lower resistance reading.
- Measure the resistance between ELD field coil C4359 pins 1 and 2, component side.
- Is the resistance between 2-4 ohms?
Yes
GO to L3.
No
INSTALL a new ELD field coil. REFER to Differential Assembly &/or Axle Shaft Assembly. CLEAR the DTCs. TEST the system for normal operation. REPEAT the self-test.
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L3 CHECK THE ELD FIELD COIL GROUND
- Measure the resistance between ELD field coil C4359-2, circuit GD123 (BK/GY), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
REFER to Differential Assembly &/or Axle Shaft Assembly to repair the rear differential. CLEAR the DTCs. TEST the system for normal operation. REPEAT the self-test.
No
REPAIR circuit GD123 (BK/GY). CLEAR the DTCs. TEST the system for normal operation. REPEAT the self-test.
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