Dodge Caliber. Manual — part 256
3.
(D65) CAN C BUS (+) CIRCUIT OPEN
Turn the ignition off.
Disconnect the TIPM C3 harness connector.
Disconnect the ECM C2 harness connector.
Measure the resistance of the (D65) CAN C Bus (+) circuit between the
TIPM connector and the ECM connector.
Is resistance below 5.0 ohms?
Yes
>> Go To 4
No
>> Repair the (D65) CAN C Bus (+) circuit for an open.
Perform the ECM VERIFICATION TEST.
4.
(D64) CAN C BUS (-) CIRCUIT OPEN
Measure the resistance of the (D64) CAN C Bus (-) circuit between the
TIPM connector and the ECM connector.
Is resistance below 5.0 ohms?
Yes
>> Replace and program the Engine Control Module in accor-
dance with the service information.
Perform the ECM VERIFICATION TEST.
No
>> Repair the (D64) CAN C Bus (-) circuit for an open.
Perform the ECM VERIFICATION TEST.
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
8E - 135
*NO RESPONSE FROM HFM (HANDS FREE MODULE)
For a complete wiring diagram Refer to Section 8W.
8E - 136
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
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Possible Causes
(A417) FUSED B(+) CIRCUIT OPEN OR SHORTED
(Z937) GROUND CIRCUIT OPEN
(D55) AND (D54) CAN B BUS CIRCUITS OPEN
HANDS FREE MODULE
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.
With the scan tool, select ECU View.
NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active
on the Bus network. A green check indicates that the module is active on the Bus network.
Does the scan tool display a red X next to the module?
Yes
>> Go To 2
No
>> The no response condition is not present at this time. Using the wiring diagram/schematic as a guide,
inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness con-
nectors for broken, bent, pushed out, and corroded terminals.
2.
(A417) FUSED B(+) CIRCUIT OPEN OR SHORTED
Turn the ignition off.
Disconnect the Hands Free Module harness connector.
Using a 12-volt test light connected to ground, check the (A417) Fused
B(+) circuit.
Does the test light illuminate brightly?
Yes
>> Go To 3
No
>> Repair the (A417) Fused B(+) circuit for an open or short.
Perform the BODY VERIFICATION TEST – VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
8E - 137
3.
(Z937) GROUND CIRCUIT OPEN
Using a 12-volt test light connected to 12-volts, check the (Z937)
ground circuit.
Does the test light illuminate brightly?
Yes
>> Go To 4
No
>> Repair the (Z937) ground circuit for an open.
Perform the BODY VERIFICATION TEST – VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
4.
(D55) AND (D54) CAN B BUS CIRCUITS OPEN
NOTE: One open circuit will not cause this condition.
Measure the voltage between the (D54) CAN B Bus (-) circuit and
ground.
Measure the voltage between the (D55) CAN B Bus (+) circuit and
ground.
Is there any voltage present on either circuit?
Yes
>> Replace the Hands Free Module in accordance with the
service information.
Perform the BODY VERIFICATION TEST – VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No
>> Repair the (D55) and (D54) CAN B Bus circuits for an open.
Inspect the connector for damage.
Perform the BODY VERIFICATION TEST – VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
8E - 138
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
PM
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