Inspect Fuse 20.

Is Fuse 20 open?

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Go to Step 18

Go to Step 2

1. Using a test lamp, backprobe between the connector C201 terminal A14 and ground.
2. Turn the ignition switch to the RUN position.

Does the test lamp light?

--

Go to Step 3

Go to Step 10

1. Disconnect the steering column connector C201.
2. Connect a DMM from the steering column harness connector C201 terminal A14 to terminal A16.
3. Press each of the left steering wheel control buttons one at a time.
4. Compare the resistance values to the specified values.

Are all of the resistance values approximately equal to the specified values?

Volume up: 1,270ohms

Volume down: 1,564ohms

Play: 1,912ohms

Mute: 2,387ohms

Go to Step 8

Go to Step 4

1. Disconnect the left radio control switch.
2. Connect a DMM between the right radio control switch harness connector terminal A and terminal C.
3. Press each of the steering wheel control buttons one at a time.
4. Compare the resistance values to the specified values.

Are all of the resistance values approximately equal to the specified values?

Volume up: 1,270ohms

Volume down: 1,564ohms

Play: 1,912ohms

Mute: 2,387ohms

Go to Step 12

Go to Step 11

1. Using a test lamp, backprobe between the radio harness connector C2 terminal 14 and ground.
2. Turn the ignition switch to the RUN position.

Does the test lamp light?

--

Go to Step 13

Go to Step 6

Using a test lamp, backprobe between B+ and the radio harness connector C2 terminal 14.

Does the test lamp light?

--

Go to Step 14

Go to Step 7

Check for a poor connection or open in CKT 1011.

Is there a poor connection or open in circuit 1011?

--

Go to Step 15

Go to Step 16

1. Disconnect the steering column connector C201.
2. Connect a DMM from the steering column harness connector C201 terminal A14 to terminal A16.
3. Press each of the left steering wheel control buttons one at a time.
4. Compare the resistance values to the specified values.

Are all of the resistance values approximately equal to the specified values?

Seek up: 3 102ohms

Seek down: 4,282ohms

AM/FM: 6,652ohms

Preset: 13,632ohms

Go to Step 5

Go to Step 9

1. Disconnect the left radio control switch.
2. Connect a DMM between terminal A and terminal C of the radio control switch harness connector.
3. Press each of the steering wheel control buttons one at a time.
4. Compare the resistance values to the specified values.

Are all of the resistance values approximately equal to the specified values?

Seek up: 3,102ohms

Seek down: 4,282ohms

AM/FM: 6,652ohms

Preset: 13,632ohms

Go to Step 12

Go to Step 17

Repair a poor connection or an open CKT 843.

Is the repair complete?

--

Go to Radio/Audio System Check

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Replace the right steering wheel radio control switch. Refer to Steering Wheel Control Switches Replacement for service procedure.

Is the repair complete?

--

Go to Radio/Audio System Check

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Replace the inflatable restraint steering wheel module coil. Refer to Inflatable Restraint Steering Wheel Module Coil Replacement for service procedure.

Is the repair complete?

--

Go to Radio/Audio System Check

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Repair a short to B+ on CKT 1011.

Is the repair complete?

--

Go to Radio/Audio System Check

--

Repair a short to ground in CKT 1011.

Is the repair complete?

--

Go to Radio/Audio System Check

--

Repair the poor connection or open in CKT 1011.

Is the repair complete?

--

Go to Radio/Audio System Check

--

Replace the radio. Refer to Radio Replacement for service procedure.

Is the repair complete?

--

Go to Radio/Audio System Check

--

Replace the left steering wheel radio control switch. Refer to Steering Wheel Control Switches Replacement for service procedure.

Is the repair complete?

--

Go to Radio/Audio System Check

--

Repair the short to ground in CKT 843.

Is the repair complete?

--

Go to Radio/Audio System Check

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