Possible Causes

Possible causes are:

• Connector or terminal malfunction
• MAP sensor malfunction
• MAP sensor signal circuit shorts to constant voltage supply circuit
• Open circuit in Brown wire between MAP sensor 4-pin harness connector terminal "A" and PCM 30-pin harness connector terminal "2H"
• Open circuit in Yellow/Black wire between MAP sensor 4-pin harness connector terminal "D" and PCM 30-pin harness connector terminal "1J"
• PCM malfunction