Dodge Durango (HB). Manual — part 426
2.
(D55) CAN B BUS (+) CIRCUIT OPEN
Turn the ignition off.
Disconnect the Seat Memory Module C1 harness connector.
Measure the voltage between the (D55) CAN B Bus (+) circuit and
ground.
Is there any voltage present?
Yes
>> Inspect the wiring and connectors for damage or shorted
circuits. If ok, replace the Seat Memory Module in accor-
dance with the service information.
Perform POWER SEAT SYSTEM VERIFICATION TEST -
VER 1.
No
>> Repair the (D55) CAN B Bus (+) circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
HB
POWER SEATS - ELECTRICAL DIAGNOSTICS
8N - 217
U0021-CAN B BUS (+) CIRCUIT OPEN —
(CONTINUED)
U0022-CAN B BUS (+) CIRCUIT LOW
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
DIAGNOSIS AND TESTING) for the diagnostic test procedure.
U0023-CAN B BUS (+) CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
DIAGNOSIS AND TESTING) for the diagnostic test procedure.
8N - 218
POWER SEATS - ELECTRICAL DIAGNOSTICS
HB
HB
POWER SEATS - ELECTRICAL DIAGNOSTICS
8N - 219
U0024-CAN B BUS (-) CIRCUIT OPEN
For the Power Seat System circuit diagram(Refer to 8 - ELECTRICAL/POWER SEATS - SCHEMATICS AND DIA-
GRAMS)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Continuously
•
Set Condition:
The Seat Memory Module detects the (D54) CAN B Bus (-) circuit is open.
Possible Causes
(D54) CAN B BUS (-) CIRCUIT OPEN
SEAT MEMORY MODULE
Theory of Operation
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase MSM DTC’s
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active MSM DTC’s.
Does the scan tool display this DTC as active?
Yes
>> Go To 2
No
>> The conditions that caused this code to set are not
present at this time. Using the wiring diagram/schematic
as a guide, inspect the wiring and connectors.
8N - 220
POWER SEATS - ELECTRICAL DIAGNOSTICS
HB
U0024-CAN B BUS (-) CIRCUIT OPEN —
(CONTINUED)
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