Montero LS 4WD V6-2972cc 3.0L SOHC 24 Valve (1996)
Wave Pattern Inspection Using an Analyzer Measurement Method
1. Disconnect the volume air flow sensor connector, and connect the special tool (test harness: MB991348) in between. (All terminals should be
connected.)
2. Connect the analyzer special patterns pickup to terminal (3) of the volume air flow sensor connector.
Alternative Method (when Test Harness Is Not Available)
Connect the analyzer special patterns pickup to ECM terminal (90).
Standard Wave Pattern
Observation Conditions
Observation conditions (Pattern changes with engine speed changes)
Wave Pattern Observation Points
Check that cycle time T becomes shorter and the frequency increases when the engine speed is increased.
Examples Of Abnormal Wave Patterns
-
Example 1
Cause of problem
-
Malfunction of sensor interface
Wave pattern characteristics
-
Rectangular wave pattern is output even when the engine is not started.
