Emissions - Diagnose/Replace Crankcase Vent Heater

9228pontiac01

Bulletin Number: 92-6-47
Reference Number: 276106
Publish Date: 6/92


Subject:
CRANKCASE VENT HEATER POTENTIAL SERVICE ISSUES (DIAGNOSE/REPLACE CRANKCASE VENT HEATER ASSEMBLY)

Models
Affected:
1992 GRAND AM MODELS W/2.3L ENGINE

ENGINE APPLICATIONS:
2.3L (VIN A, D, and 3) (RPO LG0, LD2, and L40)

CONDITION:
Several conditions may occur depending on car line. The N car may have an ABS light on, no HTR-A/C or Daytime Running Lights (HTR-A/C fuse blown). Service conditions are not limited to the examples given above; refer to the bulletins referenced below and Section 8A in the respective Service Manual for additional systems which may be affected.

CAUSE:
The crankcase vent heater assembly may have shorted out.

CORRECTION:
Replace the crankcase vent heater assembly if assembly has shorted out (GM P/N 24572353 Heater, Crankcase Vent).

SERVICE INFORMATION:
Review Section 6E3-C13 Service Bulletin 92-6-43 issued 4/92 and Section 8A Service Bulletin 92-8-22 issued 5/92 to determine if crankcase vent heater has shorted out. Replace the crankcase vent heater as needed.

Section 8A-32 in the Service Manual is the wiring schematic information for the crankcase vent heater assembly.

Parts are currently available from GMSPO.