Intermittent Fault, Rich Limit

Intermittent fault, rich limit

Checking cables
Check engine control module (ECM) and heated oxygen sensor (HO2S) connectors for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults.
Check for damaged or loose pins.
Check ground lead between engine control module (ECM) terminal 75 and heated oxygen sensor (HO2S) terminal 3 for an intermittent open-circuit and remedy according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults.
Check signal cable between engine control module (ECM) terminal 44 and heated oxygen sensor (HO2S) terminal 4 for an intermittent open-circuit and remedy according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults and for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults.

Other information
- To connect the test box, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000.
- For information on signals, Connector A Terminal A#1-90.













Continue - FAULT FOUND

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