PCM Controlled Warning Lamps Diagnosis - Tachometer

Diagnostic Chart:

Wiriing Diagram:

Diagnostic Aids

For diagnosis of the instrument panel, perform the System Check in the Instrument Panel Cluster (IPC) Microprocessor.

Check for the following conditions:

^ Poor connection at PCM. Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.

^ Damaged harness. Inspect the wiring harness for damage.

Test Description

The number below refers to the step number on the Diagnostic Table.

8. This vehicle is equipped with a PCM which utilizes an Electrically Erasable Programmable Read Only Memory (EEPROM). When the PCM is replaced, the new PCM must be programmed. Refer to PCM Replacement/Programming. Service and Repair