CAN B BUS - Passenger Door Module
U0019-CAN B BUS - PASSENGER DOOR MODULEU0019-CAN B BUS - Passenger Door Module:
WHEN MONITORED
Continuously
SET CONDITION
Whenever the CAN B Bus (+) or CAN B (-) circuit is open.
POSSIBLE CAUSES
- CAN B BUS DTC's in front control module
- (D55) CAN B BUS (+) circuit open
- (D54) CAN B BUS (-) circuit open
- Passenger door module
DIAGNOSTIC TEST
1. CHECK FOR ACTIVE DTCS
With the scan tool, read the active DTC's.
Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle.
With the scan tool, read the active DTC's.
Q: Does the scan tool display this DTC as active?
YES: Go To 2
NO: If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
2. CHECK FRONT CONTROL MODULE DTC's
With the scan tool, read Front Control Module active DTC's
Q: Does the scan tool display any CAN B BUS DTC's - ACTIVE?
YES: Refer to Body Control System for the diagnostic test procedure.
NO: Go To 3
3. (D55) CAN B BUS (+) CIRCUIT OPEN
Turn the ignition off.
Disconnect the negative battery cable.
Disconnect the Passenger Door Module C4 connector.
Disconnect the Front Control Module C1 connector.
Measure the resistance of the (D55) CAN B Bus (+) circuit between the Front Control Module C1 connector and the Passenger Door Module C4 connector.
Q: Is the resistance below 2.0 ohms?
YES: Go To 4
NO: Repair the (D55) CAN B Bus (+) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
4. (D54) CAN B BUS (-) CIRCUIT OPEN
Measure the resistance of the (D54) CAN B Bus (-) circuit between the Front Control Module C1 connector and the Passenger Door Module C4 connector.
Q: Is the resistance below 2.0 ohms?
YES: Replace the Passenger Door Module. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Repair the (D54) CAN B Bus (-) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test