NO RESPONSE FROM WCM (WIRELESS CONTROL MODULE)

For a complete wiring diagram, refer to the Wiring Information.

Possible Causes
(A412) FUSED B(+) CIRCUIT OPEN OR SHORTED
(Z914) GROUND CIRCUIT OPEN
(F20) FUSED IGNITION SWITCH OUTPUT (RUN/START) CIRCUIT OPEN OR SHORTED
(D65) CAN C BUS (+) CIRCUIT OPEN
(D64) CAN C BUS (-) CIRCUIT OPEN
WIRELESS CONTROL MODULE

1. TEST FOR INTERMITTENT CONDITION

1.	Turn the ignition on.

NOTE: Make sure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.

2.	Using 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

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 connectors for broken, bent, pushed out and corroded terminals.

2. (A412) FUSED B(+) CIRCUIT OPEN OR SHORTED

1.	Turn the ignition off.

2.	Disconnect the Wireless Control Module harness connector.

3.	Using a 12-volt test light connected to ground, check the (A412) Fused B(+) circuit.

Does the test light illuminate brightly?

Yes

Go To 3

Repair the (A412) Fused B(+) circuit for an open or short.
Perform the WCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Wireless Control (WCM) - Standard Procedure)

3. (Z914) GROUND CIRCUIT OPEN

1.	Using a 12-volt test light connected to 12-volts, check the (Z914) ground circuit.

Does the test light illuminate brightly?

Yes

Go To 4

Repair the (Z914) ground circuit for an open.
Perform the WCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Wireless Control (WCM) - Standard Procedure)

4. (F20) FUSED IGNITION SWITCH OUTPUT (RUN/START) CIRCUIT OPEN OR SHORTED

1.	Turn the ignition on.

2.	Using a 12-volt test light connected to ground, check the (F20) Fused Ignition Switch Output (Run/Start) circuit.

Does the test light illuminate brightly?

Yes

Go To 5

Repair the (F20) Fused Ignition Switch Output (Run/Start) circuit for an open or short.
Perform the WCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Wireless Control (WCM) - Standard Procedure)

5. (D65) CAN C BUS (+) CIRCUIT OPEN

1.	Turn the ignition off.

2.	Disconnect the Totally Integrated Power Module (TIPM) C1 harness connector.

3.	Measure the resistance of the (D65) CAN C Bus (+) circuit between the TIPM C1 harness connector and the Wireless Control Module connector.

Is resistance below 5.0 ohms?

Yes

Go To 6

Repair the (D65) CAN C Bus (+) circuit for an open.
Perform the WCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Wireless Control (WCM) - Standard Procedure)

6. (D64) CAN C BUS (-) CIRCUIT OPEN

1.	Measure the resistance of the (D64) CAN C Bus (-) circuit between the TIPM C1 harness connector and the Wireless Control Module connector.

Is resistance below 5.0 ohms?

Yes

Replace the Wireless Control Module in accordance with the Service Information.
Perform the WCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Wireless Control (WCM) - Standard Procedure)

Repair the (D64) CAN C Bus (-) circuit for an open.
Perform the WCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Wireless Control (WCM) - Standard Procedure)

NO RESPONSE FROM WCM (WIRELESS CONTROL MODULE)

Possible Causes