Symptom Related Diagnostic Procedures
Tachometer MalfunctionDESCRIPTION
- The meter CPU receives engine speed signals from the ECM in this circuit.
- The ECM transmits engine speed signals as pulses to the meter CPU.
- The meter CPU calculates the engine speed converting 3 pulses to 1 revolution.
Wiring Diagram:
Step 4:
Step 2-3:
Step 4-5:
Step 5(continued):
INSPECTION PROCEDURE