1

BRN

PG2 (POWER GROUND)

Ground circuit for ECM circuit

Less than 0.5 V at all times

2

BLU/RED

EGR (EXHAUST GAS RECIRCULATION (EGR) VALVE)

Drives EGR valve

With EGR operating: duty controlled

With EGR not operating: about 0 V

3

YEL/BLU

PCS (EVAPORATIVE EMISSION (EVAP) CANISTER PURGE VALVE)

Drives EVAP canister purge valve

With engine running, engine coolant below 60 °C (140 °F): battery voltage

With engine running, engine coolant above 60 °C (140 °F): duty controlled

4

BLK/WHT

SO2SHTC (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) HEATER (SENSOR 2))

Drives secondary HO2S heater (sensor 2)

With ignition switch ON (II): battery voltage

With warmed up engine running: duty controlled

7

YEL/RED

OPSW (OIL PRESSURE SWITCH)

Detects engine oil pressure signal

With ignition switch OFF: about 0 V

With engine running: battery voltage

10

BLK

PG1 (POWER GROUND)

Ground circuit for ECM circuit

Less than 0.5 V at all times

19

YEL/BLU

VCC2 (SENSOR VOLTAGE)

Provides sensor voltage

With ignition switch ON (II): about 5.0 V

24

RED/WHT

ECT1 (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 1)

Detects ECT sensor 1 signal

With ignition switch ON (II): about 0.1−4.8 V (depending on engine coolant temperature)

30

WHT/BLK

EGRP (EXHAUST GAS RECIRCULATION (EGR) VALVE POSITION SENSOR)

Detects EGR valve position sensor signal

With engine running: 1.2−3.0 V (depending on EGR valve lift)