Schematic Reference: Radio/Audio System Schematics

Did you review the Radio/Audio System Description and Operation and perform the necessary inspections?

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Go to Step 2

Go to Symptoms - Entertainment

Attempt to operate the radio functions using the steering wheel control switches.

Do the steering wheel control switches operate normally?

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Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

Test the accessory voltage circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and repair the condition?

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Go to Step 9

Go to Step 4

Caution: Refer to SIR Caution in the Preface section.

1. Test the resistance of the steering wheel control switches.
2. Press the steering wheel control buttons to the correct function, one at a time, and compare the measured values to those shown.

Are all the resistances approximately equal to the specified values?

Go to Step 6

Go to Step 5

Inspect for poor connections at the steering wheel control switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

If a poor connection is not found, replace the steering wheel control switch. Refer to Steering Wheel Control Switch Assembly Replacement in Steering Wheel and Column.

Is the repair complete?

Go to Step 9

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Test the steering wheel controls circuit for an open, short to ground, or a short to battery voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and repair the condition?

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Go to Step 9

Go to Step 7

1. Test for continuity in the accessory voltage circuit and the steering wheel controls circuit in the inflatable restraint steering wheel module coil.
2. If either of the circuits are open, replace the steering wheel module coil. Refer to Inflatable Restraint Steering Wheel Module Coil Replacement in SIR.

Is the repair complete?

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Go to Step 9

Go to Step 8

Inspect for poor connections at the steering wheel control switches. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

If a poor connection is not found, service the radio. Refer to Radio Replacement .

Is the repair complete?

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Go to Step 9

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Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 3