Power & Ground Circuits
For testing of Engine Control Module (ECM) power and ground circuits, see ENGINE CONTROL MODULE POWER SOURCE CIRCUIT. Also see PIN VOLTAGE CHARTS article. For illustration of ECM location, see THEORY & OPERATION article. For identification of ECM electrical connector terminals. (Scheme 205)- (Scheme 215).
Scheme 205
Scheme 206
Scheme 207
Scheme 208
Scheme 209
Scheme 210
Scheme 211
Scheme 212
Scheme 213
Scheme 214
Scheme 215
Scheme 216
- Disconnect electrical connector at accelerator pedal position sensor. Accelerator pedal position sensor is located near top of accelerator pedal. (Scheme 216)
- Using ohmmeter, check that resistance is within specification between specified terminals on accelerator pedal position sensor. See «ACCELERATOR PEDAL POSITION SENSOR RESISTANCE»(ref-133221-S28437197212002040500000) table. (Scheme 216) Replace accelerator pedal position sensor if resistance is not within specification. See «ACCELERATOR PEDAL POSITION SENSOR»(ref-133226-S32976509252002021900000) under ENGINE SENSORS & SWITCHES in REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article. ACCELERATOR PEDAL POSITION SENSOR RESISTANCE Application Terminals Ohms Camry VPA1 & EP2 5000 Or Less VPA2 & EP1 5000 Or Less VCP1 & EP1 2250-4750 VCP2 & EP2 2250-4750 Camry Solara VCP1 & EP1 (1) 2250-4750 VCP2 & EP2 (1) 2250-4750 (1) Resistance at 68°F (20°C).