2014 Jeep Wrangler JK Factory Service Manual 29 - Non-DTC Diagnostics

NO RESPONSE FROM THE STEERING ANGLE SENSOR (SAS)



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



Possible Causes

(F943) FUSED RUN/START RELAY OUTPUT CIRCUIT OPEN OR SHORTED
(Z910) GROUND CIRCUIT OPEN
(D65) CAN C BUS (+) CIRCUIT OPEN
(D64) CAN C BUS (-) CIRCUIT OPEN
STEERING ANGLE SENSOR

1. TEST FOR INTERMITTENT CONDITION




NOTE: Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.
1. Turn the ignition on.

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.
2. 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 sensor?

Yes


No


2. (F943) FUSED RUN/START RELAY OUTPUT CIRCUIT OPEN OR SHORTED



1. Turn the ignition off.
2. Disconnect the Steering Angle Sensor harness connector.
3. Turn the ignition on.
4. Using a 12-volt test light connected to ground, check the (F943) Fused Run/Start Relay Output circuit.


Does the test light illuminate brightly?

Yes


No


3. (Z910) GROUND CIRCUIT OPEN



1. Turn the ignition off.
2. Using a 12-volt test light connected to 12-volts, check the (Z910) ground circuit.


Does the test light illuminate brightly?

Yes


No


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



1. Disconnect the TIPM C1 harness connector.
2. Measure the resistance of the (D65) CAN C Bus (+) circuit between the TIPM C1 harness connector and the Steering Angle Sensor connector.


Is resistance below 5.0 ohms?

Yes


No


5. (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 Steering Angle Sensor connector.


Is resistance below 5.0 ohms?

Yes


No