No Response From Radio

NO-RESPONSE-FROM-RADIO

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: Make sure the battery voltage is between 10.0 and 16.0 volts.

2. With the scan tool, read the module status.

NOTE: Check the BCM for any active CAN hardware DTCs, perform DTC before proceeding.

Does the scan tool indicate that the module is active on the bus?

Yes

- 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.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

No

- Go To 2

2. CHECK THE (A933) FUSED B(+) CIRCUIT FOR AN OPEN OR SHORT
1. Turn the ignition off.
2. Disconnect the Radio Module C1 harness connector.
3. Using a 12-volt test light connected to ground, check the (A933) Fused B(+) circuit.

Does the test light illuminate brightly?

Yes

- Go To 3

No

- Repair the open or short in the (A933) Fused B(+) circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

3. CHECK THE (Z911) GROUND CIRCUIT FOR AN OPEN
1. Using a 12-volt test light connected to 12-volts, check the (Z911) Ground circuit.

Does the test light illuminate brightly?

Yes

- Go To 4

No

- Repair the open in the (Z911) Ground circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

4. CHECK THE (D177) OR (D178) CAN IHS BUS (125K) CIRCUIT FOR AN OPEN
1. Measure the resistance of the (D178) CAN IHS Bus (125K) (-) circuit between the Radio C1 harness connector and the CAN IHS IP Star Connector C5 harness connector.
2. Measure the resistance of the (D177) CAN IHS Bus (125K) (+) circuit between the Radio C1 harness connector and the CAN IHS IP Star Connector C5 harness connector.

Is resistance below 5.0 Ohms on both circuits?

Yes

- Replace the Radio Module. Radio - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

No

- Repair the open in the (D177) or (D178) CAN IHS Bus (125K) circuit. Inspect the connector for damage.
- Perform the BODY VERIFICATION TEST. Body Verification Test .