Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 368

Possible Causes

(A117) FUSED B(+) CIRCUIT OPEN OR SHORTED

(Z909) GROUND CIRCUIT OPEN

(D55) AND (D54) CAN B BUS CIRCUITS OPEN

ELECTRONIC OVERHEAD 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.

(A117) FUSED B(+) CIRCUIT OPEN OR SHORTED

Turn the ignition off.

Disconnect the Electronic Overhead Module harness connector.

Using a 12-volt test light connected to ground, check the (A117) Fused
B(+) circuit.

Does the test light illuminate brightly?

Yes

>> Go To 3

No

>> Repair the (A117) Fused B(+) circuit for an open or short.

Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).

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3.

(Z909) GROUND CIRCUIT OPEN

Using a 12-volt test light connected to 12-volts, check the (Z909)
ground circuit.

Does the test light illuminate brightly?

Yes

>> Go To 4

No

>> Repair the (Z909) ground circuit for an open.

Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).

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 Electronic Overhead Module (EOM) in accor-

dance with the service information.

Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).

No

>> Repair the (D55) and (D54) CAN B Bus circuits for an

open. Inspect the connector for damage.

Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).

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*NO RESPONSE FROM ESM (ELECTRONIC SHIFT MODULE) (SHIFTER LEVER
ASSEMBLY) - NAG1

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For a complete wiring diagram Refer to Section 8W.

Possible Causes

(Z911) OR (Z912) GROUND CIRCUITS OPEN

(F902) IGNITION UNLOCK-RUN-START CIRCUIT OPEN OR SHORTED

(D65) CAN C BUS (+) CIRCUIT OPEN

(D64) CAN C BUS (-) CIRCUIT OPEN

SHIFTER LEVER ASSEMBLY (ELECTRONIC SHIFT 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.

NOTE: Check the FCM for any active CAN C hardware and any ignition related DTCs, perform DTCs before
proceeding.

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.

CHECK THE (Z911) OR (Z912) GROUND CIRCUIT FOR AN OPEN

Turn the ignition off.

Disconnect the Shifter Lever Assembly harness connector.

Using a 12-volt test light connected to 12-volts, check the (Z911) or
(Z912) ground circuit.

Does the test light illuminate brightly?

Yes

>> Go To 3

No

>> Repair the (Z911) or (Z912) ground circuit for an open.

Perform NAG1 TRANSMISSION VERIFICATION TEST -
VER 1.

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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS

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