Dodge Caliber. Manual — part 230
3.
(D54) CAN B BUS (-) CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (D54) CAN B Bus (-)
circuit.
While monitoring the ohmmeter, disconnect each CAN B Bus module
one at a time.
NOTE: This is to determine if the circuit is shorted to ground inter-
nally within a module or if the circuit is shorted to ground in the
harness.
NOTE: Disconnecting an in-line connector can eliminate a module
or group of modules from the list of possible causes for this fault.
Refer to the wring diagrams to assist in diagnosis.
Is resistance below 1000.0 ohms with all the CAN B Bus mod-
ules disconnected?
Yes
>> Repair the (D54) CAN B Bus (-) circuit for a short to
ground.
Perform the BODY VERIFICATION TEST – VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No
>> Replace the module that when disconnected eliminated the short to ground in accordance with the ser-
vice information.
Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE).
4.
CHECK THE (D55) CAN B BUS (+) CIRCUIT FOR A SHORT TO THE (D54) CAN B BUS (-) CIRCUIT
Measure the resistance between the (D55) CAN B Bus (+) circuit and
(D54) CAN B Bus (-) circuit.
Is resistance below 1000.0 ohms?
Yes
>> Go To 5
No
>> Inspect the wiring and connectors for damage or shorted
circuits. If ok, replace the Totally Integrated Power Module
in accordance with the service information.
Perform the BODY VERIFICATION TEST – VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
PM
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
8E - 31
5.
(D55) CAN B BUS (+) CIRCUIT SHORTED TO THE (D54) CAN B BUS (-) CIRCUIT
Measure the resistance between the (D55) CAN B Bus (+) circuit and
(D54) CAN B Bus (-) circuit.
While monitoring the ohmmeter, disconnect each CAN B Bus module
one at a time.
NOTE: This is to determine if the short together is internal within a
module or if the circuits are shorted together.
NOTE: Disconnecting an in-line connector can eliminate a module
or group of modules from the list of possible causes for this fault.
Refer to the wring diagrams to assist in diagnosis.
Is resistance below 1000.0 ohms with all the CAN B Bus mod-
ules disconnected?
Yes
>> Repair the (D55) CAN B Bus (+) circuit for a short to the
(D54) CAN B Bus (-) circuit.
Perform the BODY VERIFICATION TEST – VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No
>> Replace the module that when disconnected the short together was eliminated, in accordance with the
service information.
Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE).
8E - 32
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
PM
U0026-CAN B BUS (-) CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W.
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
8E - 33
•
When Monitored:
Continuously.
•
Set Condition:
The TIPM detects the (D54) CAN B Bus (-) circuit is shorted to voltage.
Possible Causes
(D54) CAN B BUS (-) CIRCUIT SHORTED TO VOLTAGE
ANY CAN B BUS MODULE
TOTALLY INTEGRATED POWER MODULE
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase TIPM DTC’s.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM 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/sche-
matic as a guide, inspect the wiring and connectors.
2.
CHECK THE (D54) CAN B BUS (-) CIRCUIT FOR A SHORT TO VOLTAGE
Turn the ignition off.
Disconnect the Totally Integrated Power Module C3 harness connector.
Turn the ignition on.
Measure the voltage between the (D54) CAN B Bus (-) circuit and
ground.
Is voltage above 10.0 volts?
Yes
>> Go To 3
No
>> Inspect the wiring and connectors for damage or shorted
circuits. If ok, replace the Totally Integrated Power Module
in accordance with the service information.
Perform the BODY VERIFICATION TEST – VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
8E - 34
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
PM
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