B2337

TIPM-B2337-HORN CONTROL CIRCUIT HIGH





For a complete wiring diagram refer to Diagrams/Electrical.

- When Monitored:

With the ignition on. Battery voltage greater than 10.4 volts.

- Set Condition:

A shorted high condition in the (X21)/(X22) Horn Control Output circuit.





Diagnostic Test

1. CHECK FOR ACTIVE DTC B2337 - HORN CONTROL CIRCUIT HIGH IN THE TIPM

Turn the ignition on.

With the scan tool, record and erase DTC's.

Operate the Horn Switch several times.

With the scan tool, read DTC's.

Does the scan tool display active DTC B2337-HORN CONTROL CIRCUIT HIGH?

Yes

- Go To2

No

- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.

2. CHECKING THE HORN(S)

Turn the ignition off.

Disconnect the Horn(s) connector(s).

Momentarily jumper 12-volts to the horn(s).

Did the horn(s) operate properly?

Yes

- Go To 4

No

- Go To3
-

3. CASE GROUND CIRCUIT OPEN

Using a 12-volt test light connected to 12-volts, check for a good case ground at the horn(s) case.

Does the test light illuminate brightly?

Yes

- Replace the Horn(s) as necessary.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Repair the open or excessive resistance at the horn(s) case ground.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

4. (X21)/(X22) HORN CONTROL OUTPUT CIRCUIT SHORTED TO BATTERY VOLTAGE





Turn the ignition off.

Disconnect the C11 TIPM harness connector.

Ignition on, engine not running.

Measure the voltage between (X21)/(X22) Horn Control Output circuit(s) and ground at the horn connector(s).

Is there any voltage present?

Yes

- Repair the short to battery voltage in the (X21)/(X22) Horn Control Output circuit.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 5

5. TOTALLY INTEGRATED POWER MODULE

NOTE: Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

Using the schematics as a guide, inspect the wire harness and connectors.

Pay particular attention to all Power and Ground circuits.

Were any problems found?

Yes

- Repair as necessary.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Replace the Totally Integrated Power Module.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test