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8. CHECK THE TPS GROUND CIRCUIT FOR AN OPEN OR SHORT • Check harness continuity between electronic throttle control actuator terminal 2 and ECM terminal 78. • Continuity should exist. • Also check harness for short to power and short to ground. Is the check result normal? Yes >> Go to the next step. No >> Repair or replace circuit for an open or short to power or short to ground in harness or connectors. 9. CHECK TPS • Connect all harness connectors disconnected. • Turn ignition switch on. • Check voltage between ECM terminals 54 (TPS1 signal), 38 (TPS2 signal) and ground under the following con- ditions: TPS TERMINAL NO. ITEM CONDITION DATA (DC VOLTAGE) 5 Throttle Position Sensor 2 (TPS2) Ignition • Engine stopped • Accelerator 4.24 V • Engine stopped • Accelerator 0.72 V 6 Throttle Position Sensor 1 (TPS1) • Engine stopped • Accelerator 0.74 V • Engine stopped • Accelerator 4.62 V Is the check result normal? Yes >> Go to the next step. No >> Replace the Electronic Throttle Control Actuator (See Electronic Throttle Control Actuator Removal & Installation in Section 03 Electronic Engine Controls). DIAGNOSIS & TESTING 03
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