Operate all of the steering wheel controls.

Do all of the steering wheel controls operate properly?

-

Testing for Intermittent Conditions and Poor Connections

Go to Step 2

Test the radio on signal circuit for a short to ground or open.

Did you find and correct the condition?

-

Go to Step 9

Go to Step 3

Warning: Refer to SIR Warning in the Preface section.

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

Are the measured resistances approximately equal to the specified values?

Volume Up: 1.2 K Ω Volume Down: 1.56 K Ω Mode: 1.9 K Ω Mute: 2.38 K Ω Seek Up: 3.1 K Ω Seek Down: 4.28 K Ω Seek Type: 6.65 K Ω Pre-Set: 13.6 K Ω

Go to Step 4

Go to Step 6

Test the steering wheel controls signal circuit for a short, high resistance or an open.

Did you find and correct the condition?

-

Go to Step 9

Go to Step 5

Inspect for poor connections at the wiring harness plug of the radio.

Did you find and correct the condition?

-

Go to Step 9

Go to Step 8

Inspect for poor connections at the wiring harness plug of the steering wheel radio controls.

Did you find and correct the condition?

-

Go to Step 9

Go to Step 7

Replace the appropriate steering wheel radio control.

Did you complete the replacement?

-

Go to Step 9

-

Replace the radio.

Did you complete the replacement?

-

Go to Step 9

-

Operate the system in order to verify the repair.

Did you correct the condition?

-

System OK

Go to Step 1