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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 82 (Engine Controls - Tests W/Codes - Body Control Computer) >> Self-Diagnostic Tests >> Test 42A - Electro/Mechanical Instrument Cluster Diagnostics

Test 42A - Electro/Mechanical Instrument Cluster Diagnostics

WARNING: This page is about a different car, the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, 1995 Dodge Caravan, and 1995 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For appropriate wiring diagram, see WIRING DIAGRAMS  section at the end of this article. Perform TEST VER-1B after each repair.
CAUTION: Always turn ignition off prior to disconnecting or connecting any module connector.
NOTE: Electro/Mechanical Instrument Cluster (MIC) is an electronic cluster receiving information from CCD link and displaying information in analog gauges. These test procedures cover both base and premium MIC.
  1. If all MIC gauges are inoperative, go to TEST 54A. Using scan tool, read instrument cluster I.D. status. If scan tool displays EIC/US, go to TEST 43A. If all gauges are inaccurate or erratic, go to TEST 46A. If some gauges are operating, if scan tool does not display EIC/US, and/or some gauges are accurate and not erratic, go to next step.
  2. MIC diagnostics are separated into 5 categories. Verify customer complaint and identify problem area before performing appropriate test. See INSTRUMENT CLUSTER PROBLEM DIRECTORY table below.
INSTRUMENT CLUSTER PROBLEM DIRECTORY

Problem Perform TEST
Defective Gauge 44A
Defective Speedometer Or Odometer 48A
Improper Cluster Illumination 38A
Defective Warning Lamps
Premium MIC 49A
Base MIC 50A