TIPM–B2338–HORN CONTROL CIRCUIT OPEN

For a complete wiring diagram Refer to Section 8W

When Monitored:
With the ignition on. Battery voltage greater than 10.4 volts.
Set Condition:
An open condition on the (X21)/(X22) Horn Control Output circuit.

Possible Causes

TERMINAL DAMAGE OR CORROSION

(X21) HORN CONTROL OUTPUT CIRCUIT OPEN

(X22) HORN CONTROL OUTPUT CIRCUIT OPEN (EXPORT)

HORN CASE GROUND

HORN

TOTALLY INTEGRATED POWER MODULE

1.CHECK FOR ACTIVE DTC B2338–HORN CONTROL CIRCUIT OPEN

Does the scan tool display active DTC B2338–HORN CONTROL CIRCUIT OPEN?

Yes

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.VISUAL AND PHYSICAL CONNECTOR AND TERMINAL INSPECTION

NOTE: Make sure that all in-line connectors are inspected for corrosion and/or damage.

Were any of the above conditions found?

Yes

Repair or replace as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

3.(X21)/(X22) HORN CONTROL OUTPUT CIRCUIT OPEN

NOTE: Cavity 8 at the C11 TIPM harness connector is for export vehicles only.

Is the resistance below 5.0 ohms?

Yes

Repair the (X21)/(X22) Horn Control Output circuit for an open.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE).

4.CHECKING HORN OPERATION

Did the horn(s) operate properly?

Yes

5.CASE GROUND CIRCUIT OPEN

Does the test light illuminate brightly?

Yes

Replace the Horn(s) as necessary.
Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

Repair the open or excessive resistance at the horn(s) case ground.
Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

6.TOTALLY INTEGRATED POWER MODULE

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

Were any problems found?

Yes

Replace the Totally Integrated Power Module per Service Information.
Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)