No Response From LBSS (Left Blind Spot Sensor)

NO RESPONSE FROM LBSS (LEFT BLIND SPOT SENSOR)

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









Diagnostic Test

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

2. (F921) FUSED IGNITION OUTPUT (RUN) CIRCUIT OPEN
1. Disconnect the Left Blind Spot Sensor (LBSS) harness connector.
2. Turn the ignition on.
3. Using a volt meter, measure the voltage of the (F921) Fused Ignition Output (RUN) circuit.

Is voltage present?

Yes

- Go To 3

No

- Repair the (F921) Fused Ignition Switch Output (RUN) circuit for an open or short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. (Z907) GROUND CIRCUIT(S) OPEN
1. Turn the ignition off.
2. Using an ohm meter, measure the resistance between ground and the (Z907) Ground circuits at the LBSS harness connector.

Is the resistance below 5.0 Ohms?

Yes

- Go To 4

No

- Repair the (Z907) Ground circuit(s) for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. CHECK THE (D264) AND (D265) CAN IHS BUS CIRCUITS FOR AN OPEN
1. Turn the ignition on.
2. Measure the resistance of the (D264) CAN IHS Bus (-) circuit between the TIPM C7 harness connector and the LBSS harness connector
3. Measure the resistance of the (D265) CAN IHS Bus (+) circuit between the TIPM C7 harness connector and the LBSS harness connector.

Is resistance below 5.0 Ohms on both circuits?

Yes

- Replace the Left Blind Spot Sensor. Blind Spot Sensor - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the (D265) or (D264) CAN IHS Bus circuit for an open. Inspect the connector for damage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.