Circuit Description

Relay circuit supplies power to TRAC pump motor. With TRAC activated, ECU switches motor relay on. DTC is set under the following conditions:

• ECU detects battery voltage at terminal No. 4 (Green wire) on TRAC motor relay.
• ECU detects zero voltage at terminal No. 2 (Blue/Yellow wire) on TRAC pump connector.

Possible causes are:

• TRAC motor relay.
• TRAC motor relay open or short circuit.
• ECU.