Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 563
U0021 — CAN B BUS (+) CIRCUIT OPEN
For a complete wiring diagram Refer to Section 8W.
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MESSAGE CENTER - ELECTRICAL DIAGNOSTICS
LX
•
When Monitored:
With the ignition switch on.
•
Set Condition:
The Multi-Purpose Module (Police And Taxi Interface Module-PTIM) has detected an open condition on the
(W527) VSIM CAN B Bus (+) circuit.
Possible Causes
(W527) VSIM CAN B BUS (+) CIRCUIT OPEN
Multi-Purpose Module (Police And Taxi Interface Module-PTIM)
Diagnostic Test
1.
CHECK FOR ACTIVE DTC
With the scan tool, read the active DTCs.
Erase the DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
With the scan tool, read the active DTC’s.
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 con-
nectors. Look for broken, bent, pushed out, or corroded terminals, and repair any obvious problems.
Perform BODY VERIFICATION TEST – VER 1. (Refer to BODY VERIFICATION TEST – VER 1).
2.
CHECK THE (W527) VSIM CAN B BUS (+) CIRCUIT FOR AN OPEN
Turn the ignition off.
Disconnect the Multi-Purpose Module (Police And Taxi Interface Mod-
ule-PTIM) C1 harness connector.
Disconnect the Multi-Purpose Module (Police And Taxi Interface Mod-
ule-PTIM) 24 way harness connector (aftermarket light/siren controller
side).
Measure the resistance of the (W527) VSIM CAN B Bus (+) circuit
between the Multi-Purpose Module (Police And Taxi Interface Module-
PTIM) C2 connector and the Multi-Purpose Module (Police And Taxi
Interface Module-PTIM) 24 way harness connector (aftermarket light/si-
ren controller side).
Is the resistance below 5.0 ohms?
Yes
>> Inspect the wiring and connectors for damage or shorted
circuits. If ok, replace the Front Control Module in accor-
dance with the service information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).
No
>> Repair the (W527) Multi-Purpose Module (Police And Taxi
Interface Module-PTIM) CAN B Bus (+) circuit for an open.
Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).
LX
MESSAGE CENTER - ELECTRICAL DIAGNOSTICS
8M - 123
U0022 CAN B BUS (+) CIRCUIT LOW
For a complete wiring diagram Refer to Section 8W.
8M - 124
MESSAGE CENTER - ELECTRICAL DIAGNOSTICS
LX
•
When Monitored:
With the ignition switch on.
•
Set Condition:
The Multi-Purpose Module (Police And Taxi Interface Module-PTIM) has detected the (W527) VSIM CAN B
Bus (+) circuit is below a calibrated value.
Possible Causes
(W527) VSIM CAN B BUS (+) CIRCUIT SHORTED TO GROUND
MULTI-PURPOSE MODULE (POLICE AND TAXI INTERFACE MODULE-PTIM)
Diagnostic Test
1.
CHECK FOR ACTIVE DTC
With the scan tool, read the active DTCs.
Erase the DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
With the scan tool, read the active DTC’s.
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 con-
nectors. Look for broken, bent, pushed out, or corroded terminals, and repair any obvious problems.
Perform BODY VERIFICATION TEST – VER 1. (Refer to BODY VERIFICATION TEST – VER 1).
2.
CHECK (W527) VSIM CAN B BUS (+) CIRCUIT FOR A SHORT TO GROUND
Turn the ignition off.
Disconnect the Multi-Purpose Module (Police And Taxi Interface Mod-
ule-PTIM) C2 harness connector.
Disconnect the Multi-Purpose Module (Police And Taxi Interface Mod-
ule-PTIM) 24 way harness connector (aftermarket light/siren controller
side).
Disconnect the scan tool from the DLC.
Measure the resistance between ground and the (W527) VSIM CAN B
Bus (+) circuit.
Is the resistance below 5.0 ohms?
Yes
>> Repair the (W527) VSIM CAN B Bus (+) circuit for a short
to ground.
Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).
No
>> Inspect the wiring and connectors for damage or shorted
circuits. If ok, replace the Multi-Purpose Module (Police And
Taxi Interface Module-PTIM) in accordance with the service
information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to BODY VERIFICATION TEST – VER 1).
LX
MESSAGE CENTER - ELECTRICAL DIAGNOSTICS
8M - 125
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