Operation CHARM
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Nissan-Datsun
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1989
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Stanza L4-1974cc 2.0L SOHC (CA20E)
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Relays and Modules - Computers and Control Systems
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Main Relay (Computer/Fuel System)
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Description and Operation
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Polarity Protection Relay, ECM
Polarity Protection Relay, ECM
The safety relay, located in the
relay box
in the engine compartment, is utilized to prevent damage to the ECU in the event the battery is connected in reverse.