Important: A short to ground will cause a open fuse(s). Before performing this diagnostic procedure, inspect the fuse(s) for an open.

Do all of the radio functions operate normally at the radio?

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Go to Step 2

Go to Step 3

1. Disconnect the radio connector C2.
2. Turn the ignition switch to the RUN position.
3. Turn the radio ON.
4. Use the J 39200 in order to measure the voltage between the radio connector C2 terminal 14 and ground. While measuring, operate each steering wheel control button.
5. Compare each voltage with the steering wheel controls resistance/voltage chart.

Is the measured voltage within the specified range?

0-5 V

Go to Step 14

Go to Step 16

1. Disconnect the radio connector C2.
2. Turn the radio ON.

Do all of the radio functions operate normally at the radio?

--

Go to Step 4

Go to Step 14

Use the J 39200 in order to measure the voltage on CKT 1011 between the radio connector C2 terminal 14 and ground.

Does the measured voltage equal the specified value?

0 V

Go to Step 9

Go to Step 5

1. Disable the Supplemental Inflatable Restraint (SIR) System. Remove and disconnect the inflator module from the steering wheel. Refer to Inflator Module--Supplemental Inflatable Restraint (SIR) in Supplemental Inflatable Restraint (SIR).
2. Disconnect the steering wheel control switches connector.
3. Use the J 39200 in order to measure the voltage in CKT 1011 between the radio harness connector C2 terminal 14 and ground.

Does the measured voltage equal the specified value?

0 V

Go to Step 7

Go to Step 6

Repair the short to B+ in CKT 1011 between the radio harness connector C2 terminal 14 and the SIR coil assembly connector C. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

System OK

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1. Disconnect the steering wheel control switches connector.
2. Use the J 39200 in order to measure the voltage in CKT 1011 between the SIR coil assembly connector terminal C and ground.

Does the measured voltage equal the specified value?

0 V

Go to Step 8

Go to Step 25

Use the J 39200 in order to measure the voltage in CKT 1011 between the steering wheel controls connector terminal C and ground.

Does the measured voltage equal the specified value?

0 V

Go to Step 9

Go to Step 24

Use the J 39200 in order to measure the resistance on CKT 1011 between the radio connector C2 terminal 14 and ground.

Does the measured voltage equal the specified value?

Infinite

Go to Step 11

Go to Step 10

Repair the short to ground in CKT 1011 between the radio connector C2 terminal 14 and the SIR coil assembly connector terminal C. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

System OK

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Use the J 39200 in order to measure the resistance on CKT 1011 between the SIR coil assembly connector terminal C and ground.

Does the measured voltage equal the specified value?

Infinite

Go to Step 12

Go to Step 25

Use the J 39200 in order to measure the resistance on CKT 1011 between the steering wheel controls connector terminal C and ground.

Does the measured voltage equal the specified value?

Infinite

System OK

Go to Step 24

Service the radio. Refer to Diagnostic System Check - Radio/Audio System .

Is the repair complete?

--

System OK

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Test CKT 1011 for a poor connection at the radio connector C2 terminal 14.

Was a poor connection found?

--

Go to Step 15

Go to Radio/Audio System Schematics .

Repair the poor connection in CKT 1011 at the radio connector C2 terminal 14. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

System OK

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1. Disable the Supplemental Inflatable Restraint (SIR) System. Remove and disconnect the inflator module from the steering wheel.
2. Disconnect the steering wheel control switches connector.
3. Use the J 39200 in order to measure the resistance between the steering wheel switches connector terminal A and terminal C. While measuring, operate each steering wheel control button.
4. Compare each resistance with the steering wheel controls resistance/voltage chart. Refer to Steering Wheel Control System Check .

Is the voltage equal to the value specified by the table?

--

Go to Step 17

Go to Step 24

Use the J 39200 in order to measure the voltage in CKT 43 between the steering wheel controls connector terminal A and ground. Terminal A is on the steering wheel control side.

Does the measured voltage equal the specified value?

0 V

Go to Step 18

Go to Step 24

Use the J 39200 in order to measure the voltage in CKT 43 between the steering wheel controls connector terminal A and ground.

Is the voltage equal to the specified value?

B+

System OK

Go to Step 19

1. Disconnect the steering wheel control switches connector.
2. Use the J 39200 in order to measure the voltage in CKT 43 between the SIR coil assembly harness connector terminal A and ground.

Is the voltage equal to the specified value?

B+

Go to Step 25

Go to Step 20

Use the J 39200 in order to backprobe and measure the voltage in CKT 43 between the inline fuse A connector A and ground.

Is the voltage equal to the specified value?

B+

Go to Step 21

Go to Step 22

Repair the open circuit condition in CKT 43 between the SIR coil assembly connector terminal A and the inline fuse A terminal A. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

System OK

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1. Disconnect the radio connector C2.
2. Use the J 39200 in order to measure the voltage in CKT 43 between the inline fuse A connector terminal B and ground.

Is the voltage equal to the specified value?

B+

Go to Step 26

Go to Step 23

Repair the open circuit condition in CKT 43 between the inline fuse A connector terminal B and the fuse block. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

System OK

--

Replace the steering wheel control switches.

Is the repair complete?

--

System OK

--

Replace the SIR coil assembly. Refer to Inflatable Restraint Steering Wheel Module Coil Replacement in SIR.

Is the repair complete?

--

System OK

--

Replace the inline fuse A.

Is the repair complete?

--

System OK

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