Dodge Caliber. Manual — part 225
U0019-CAN B BUS
For a complete wiring diagram Refer to Section 8W.
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
8E - 11
•
When Monitored:
With the ignition on.
•
Set Condition:
The TIPM detects an open, a short high, a short low or a short together in either of the CAN B Bus circuits.
Possible Causes
(D55) CAN B BUS (+) CIRCUIT OPEN
(D54) CAN B BUS (-) CIRCUIT OPEN
(D55) CAN B BUS (+) CIRCUIT SHORTED TO VOLTAGE
(D54) CAN B BUS (-) CIRCUIT SHORTED TO VOLTAGE
(D55) CAN B BUS (+) CIRCUIT SHORTED TO GROUND
(D54) CAN B BUS (-) CIRCUIT SHORTED TO GROUND
(D55) CAN B BUS (+) CIRCUIT SHORTED TO (D54) CAN B BUS (-) CIRCUIT
ANY CAN B BUS 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.
MEASURE VOLTAGE AT TIPM
Gain access to the Totally Integrated Power Module C3 harness connector, but do not disconnect.
Backprobe and measure the voltage on both the (D55) CAN B Bus (+) and the (D54) CAN B (-) circuits.
Does the voltage read approximately 4.65 - 4.98 volts on the (D54) CAN B Bus (-) and 0.39 - 0.46 volts
on the (D55) CAN B (+) circuits?
Yes
>> Go To 3
No - Voltage Between 0.3 - 0.7 Volts on Both Circuits
Go To 9
No - Voltage Reads 0 Volts on Either Circuit
Go To 7
No - Voltage Above 10 Volts on Either Circuit
Go To 5
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
PM
3.
(D55) CAN B BUS (+) CIRCUIT OPEN
Turn the ignition on.
With the scan tool select ECU View.
Using a fused jumper wire, connect one end to ground and with the
other end backprobe the (D54) CAN B Bus (-) circuit at the TIPM C3
harness connector.
NOTE: A red “X” will appear next to modules that can no longer
communicate on the Bus.
Did a red “X” appear next to any modules on the scan tool?
Yes
>> Using the Wiring Diagrams to further isolate the open in the
circuit, repair the (D55) CAN B Bus (+) circuit for an open.
Perform the BODY VERIFICATION TEST – VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No
>> Go To 4
4.
(D54) CAN B BUS (-) CIRCUIT OPEN
With the scan tool select ECU View.
Using a fused jumper wire, connect one end to ground and with the
other end backprobe the (D55) CAN B Bus (+) circuit at the TIPM C3
harness connector.
NOTE: A red “X” will appear next to modules that can no longer
communicate on the Bus.
Did a red “X” appear next to any modules on the scan tool?
Yes
>> Using the Wiring Diagrams to further isolate the open in the
circuit, repair the (D54) CAN B Bus (-) circuit for an open.
Perform the BODY VERIFICATION TEST – VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No
>> Inspect the wiring and connectors for damage. If ok, replace
and program the Totally Integrated Power Module in accor-
dance with the service information. Perform the BODY
VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/
ELECTRONIC CONTROL MODULES - STANDARD PRO-
CEDURE).
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
8E - 13
5.
(D55) CAN B BUS (+) CIRCUIT FOR A SHORT TO VOLTAGE
Turn the ignition off.
Disconnect the TIPM C3 harness connector.
Turn the ignition on.
Measure the voltage between the (D55) CAN B Bus (+) circuit and
ground.
Is the voltage above 10.0 volts?
Yes
>> Disconnect each CAN B Bus module one at a time while
observing the voltage to determine if the short is caused by
an internal short within a module. Replace the module, in
accordance with the service information, that when discon-
nected eliminates the short to voltage. If the short condition
is still present with all CAN B Bus modules disconnected
use the Wiring Diagrams to help isolate and repair the
(D55) CAN B Bus (+) circuit for a short to voltage.
Perform the BODY VERIFICATION TEST – VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No
>> Go To 6
6.
(D54) CAN B BUS (-) CIRCUIT FOR A SHORT TO VOLTAGE
Measure the voltage between the (D54) CAN B Bus (-) circuit and
ground.
Is the voltage above 10.0 volts?
Yes
>> Disconnect each CAN B Bus module one at a time while
observing the voltage to determine if the short is caused by
an internal short within a module. Replace the module, in
accordance with the service information, that when discon-
nected eliminates the short to voltage. If the short condition
is still present with all CAN B Bus modules disconnected
use the Wiring Diagrams to help isolate and repair the
(D54) CAN B Bus (-) circuit for a short to voltage.
Perform the BODY VERIFICATION TEST – VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No
>> Inspect the wiring and connectors for damage. If ok, replace
and program the Totally Integrated Power Module in accor-
dance with the service information. Perform the BODY
VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/
ELECTRONIC CONTROL MODULES - STANDARD PRO-
CEDURE).
8E - 14
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
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