CAMSHAFT POSITION SENSOR
| Temperature °F (°C) | (1) Ohms |
|---|
| LS400 |
| 14-122 (-10-50) | 835-1400 |
| 123-212 (51-100) | 1060-1645 |
| (1) Measure resistance between sensor terminals. |
| (1) | Measure resistance between sensor terminals. |
CAMSHAFT POSITION SENSOR RESISTANCE
CRANKSHAFT POSITION SENSOR
| Temperature °F (°C) | (1) Ohms |
|---|
| LS400 |
| 14-122 (-10-50) | 835-1400 |
| 123-212 (51-100) | 1060-1645 |
| (1) Measure resistance between sensor terminals. |
| (1) | Measure resistance between sensor terminals. |
CRANKSHAFT POSITION SENSOR RESISTANCE
ENGINE COOLANT TEMPERATURE SENSOR
| Temperature °F (°C) | (1) Ohms |
|---|
| 4 (-20) | 10,000-20,000 |
| 32 (0) | 4000-7000 |
| 68 (20) | 2000-3000 |
| 104 (40) | 900-1300 |
| 140 (60) | 400-700 |
| 176 (80) | 200-400 |
| (1) Measure resistance between sensor terminals. |
| (1) | Measure resistance between sensor terminals. |
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE
EGR GAS TEMPERATURE SENSOR
| Temperature °F (°C) | (1) Ohms |
|---|
| 122 (50) | 64,000-97,000 |
| 212 (100) | 11,000-16,000 |
| 302 (150) | 2000-4000 |
| (1) Measure resistance between sensor terminals. |
| (1) | Measure resistance between sensor terminals. |
EGR GAS TEMPERATURE SENSOR RESISTANCE
Note. Intake Air Temperature (IAT) sensor is part of volume Mass Airflow (MAF) sensor.
INTAKE AIR TEMPERATURE SENSOR
| Ambient Temperature °F (°C) | (1) Ohms |
|---|
| 4 (-20) | 10,000-20,000 |
| 32 (0) | 4000-7000 |
| 68 (20) | 2000-3000 |
| 104 (40) | 900-1300 |
| 140 (60) | 400-700 |
| 176 (80) | 200-400 |
| (1) Measure resistance between terminals THA and E2 of MAF sensor. |
| (1) | Measure resistance between terminals THA and E2 of MAF sensor. |
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE
IDLE AIR CONTROL VALVE
| Application | Ohms |
|---|
| LS400 (3) |
| Cold (1) | 31-61 |
| Hot (2) | 38-71 |
| (1) IAC valve temperature of 14-122°F (-10-50°C). (2) IAC valve temperature of 123-212°F (51-100°C). (3) Measure resistance between terminal B1 and terminals S1 and S3. Also, measure resistance between terminal B2 and terminals S2 and S4. (Scheme 1) |
| (1) | IAC valve temperature of 14-122°F (-10-50°C). |
| (2) | IAC valve temperature of 123-212°F (51-100°C). |
| (3) | Measure resistance between terminal B1 and terminals S1 and S3. Also, measure resistance between terminal B2 and terminals S2 and S4. (Scheme 1) |
IDLE AIR CONTROL (IAC) VALVE RESISTANCE
Scheme 1
KNOCK SENSOR
| Measure Resistance Between | Ohms |
|---|
| KS Terminal & Sensor Body | Infinity (No Continuity) |
| (1) Replace sensor if continuity exists. |
| (1) | Replace sensor if continuity exists. |
KNOCK SENSOR (KS) RESISTANCE (1)
OXYGEN SENSOR HEATER
| Application | Ohms @ 68°F (20°C) |
|---|
| LS400 | 11-16 |
| (1) Measure resistance between terminals +B and HT of oxygen sensor 4-pin connector. (Scheme 2) |
| (1) | Measure resistance between terminals +B and HT of oxygen sensor 4-pin connector. (Scheme 2) |
OXYGEN SENSOR HEATER RESISTANCE (1)
Scheme 2
SUB-THROTTLE POSITION SENSOR
| Throttle Plate Position | Sub-TP Sensor Terminals | Ohm Readings |
|---|
| Throttle Fully Closed | VTA2 & E2 | 340-6300 |
| .012" (.35 mm) (1) | IDL2 & E2 | 500 Or Less |
| .020" (.50 mm) (1) | IDL2 & E2 | Infinite (Open) |
| Throttle Fully Open | VTA2 & E2 | 2400-11,200 |
| All Positions | VC & E2 | 3100-7200 |
| (1) Remove sub-throttle actuator from throttle body. Insert feeler gauge between sub-throttle valve stop screw and gear. |
| (1) | Remove sub-throttle actuator from throttle body. Insert feeler gauge between sub-throttle valve stop screw and gear. |
THROTTLE POSITION SENSOR
| Application & Throttle Plate Position (1) | TP Sensor Terminals | Ohm Readings |
|---|
| LS400 |
| Throttle Fully Closed | VTA1 & E2 | 340-6300 |
| .016" (.40 mm) (2) | IDL1 & E2 | 500 Or Less |
| * (3) | IDL1 & E2 | Infinite (Open) |
| Throttle Fully Open | VTA1 & E2 | 2400-11,200 |
| All Positions | VC & E2 | 3100-7200 |
| (1) Disconnect vacuum hose from throttle opener. Apply vacuum to throttle opener to allow throttle to fully seat. (2) Insert feeler gauge between throttle lever and throttle stop screw. (3) Insert a .026" (.65 mm) feeler gauge between throttle lever and throttle stop screw. |
| (1) | Disconnect vacuum hose from throttle opener. Apply vacuum to throttle opener to allow throttle to fully seat. |
| (2) | Insert feeler gauge between throttle lever and throttle stop screw. |
| (3) | Insert a .026" (.65 mm) feeler gauge between throttle lever and throttle stop screw. |
