U1149-LOST COMMUNICATION WITH MULTIFUNCTION SWITCH (STEERING CONTROL MODULE)
For a complete wiring diagram Refer to Section 8W.
Possible Causes
|
(D506) LIN BUS CIRCUIT OPEN
|
(F943) FUSED RUN/START RELAY OUTPUT CIRCUIT OPEN
|
(A412) FUSED B(+) (I.O.D.) CIRCUIT OPEN
|
(Z910) GROUND CIRCUIT OPEN
|
STEERING CONTROL MODULE
|
CLUSTER
|
Diagnostic Test
1.
CHECK FOR AN ACTIVE DTC
Turn the ignition on.
With the scan tool, record and erase DTCs.
Wait 30 seconds.
With the scan tool, read DTCs.
Does the scan tool display this DTC as active?
Yes
No
-
The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed,
pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
-
Perform BODY VERIFICATION TEST - VER 1.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
2. (D506) LIN BUS CIRCUIT
Turn the ignition off.
Disconnect the Steering Control Module harness connector.
Turn the ignition on.
Measure the voltage of the (D506) LIN BUS circuit.
Is the voltage above 5 volts?
Yes
No
3. (D506) LIN BUS CIRCUIT OPEN
Turn the ignition off.
Disconnect the Cluster C2 harness connector.
Measure the resistance of the (D506) LIN BUS circuit.
Is the resistance below 10K ohms?
Yes
No
4. (F943) FUSED RUN/START RELAY OUTPUT CIRCUIT OPEN
Turn the ignition on.
Using a 12-volt test light connected to ground, check the (F943) Fused RUN/START Relay Output circuit at the Steering Control Module harness connector.
Does the test light illuminate brightly?
Yes
No
5. (A412) FUSED B(+) (I.O.D.) CIRCUIT OPEN
Turn the ignition on.
Using a 12-volt test light connected to ground, check the (A412) Fused B+ (I.O.D.) circuit at the Steering Control Module harness connector.
Does the test light illuminate brightly?
Yes
No
6.
(Z910) GROUND CIRCUIT OPEN
Turn the ignition off.
Using a 12-volt test light connected to 12-volts, check the (Z910) Ground circuit at the Steering Control Module harness connector.
Does the test light illuminate brightly?
Yes
No