ELECTRIC COOLING FAN
Note. On models with A/C, electric radiator cooling fans are also controlled by A/C system. See appropriate article in the AIR CONDITIONING & HEAT Section for additional information.
Engine Compartment Fan (MR2 Turbo)
- Ensure engine compartment temperature is below 113°F (45.5°C). Turn ignition on. Fan motor should not run. If fan operates, check cooling fan relays, engine compartment temperature switch and wiring.
- With ignition on, unplug engine compartment temperature switch. Fan motor should operate. If fan does not operate, check ignition main relay, cooling fan relays, cooling fan ECU, fan motor, fuse and wiring.
- Reconnect engine compartment temperature switch. Start engine and raise engine compartment temperature above 144.5°F (62.5°C). Fan motor should operate. If fan does not operate, replace engine compartment temperature switch.
Radiator Cooling Fan (Camry 4-Cyl., Celica, Corolla, MR2 & Tercel)
- Ensure engine coolant temperature is below STEP 1 temperature. See COOLING FAN QUICK TEST TEMP. SPECS. TABLE. Turn ignition on. Fan motor should not run. If it does, check cooling fan relays, coolant temperature switch and wiring.
- With ignition on, unplug coolant temperature switch. Fan motor should operate. If fan does not operate, check cooling fan relays, fan motor, engine main relay, fuse and wiring.
- Reconnect coolant temperature switch. Start engine and raise coolant temperature above STEP 2 temperature. See RADIATOR COOLING FAN QUICK TEST TEMP. SPECS. TABLE. Fan motor should operate. If fan does not operate, replace coolant temperature switch.
| Application | Step 1 Temperature °F (°C) | Step 2 Temperature °F (°C) |
|---|
| Camry (4-Cyl.), Celica & Corolla | 181 (83) | 199 (93) |
| MR2 |
| With A/C | 185 (85) | 194 (90) |
| Without A/C | 181 (83) | 199 (93) |
| Tercel | 181 (89) | 201 (94) |
RADIATOR COOLING FAN QUICK TEST TEMP. SPECS.
Radiator Cooling Fan (Camry V6)
- Ensure engine coolant temperature is below 185°F (85°C). Turn ignition on. Fan motor should not run. If it does, check cooling fan relay, coolant temperature sensor and wiring.
- With ignition on, unplug coolant temperature sensor. Fan motor should operate. If fan does not operate, check cooling fan relay, fan motor, engine main relay, fuse, coolant temperature sensor and wiring.
- Reconnect coolant temperature sensor connector. Start engine and raise coolant temperature to 185-194°F (85-90°C). Fan motor should operate at low speed. If fan does not operate at low speed, replace coolant temperature sensor.
- With engine on continue to raise coolant temperature above 194°F (90°C). Fan motor should operate at high speed. If fan does not operate at high speed, replace coolant temperature sensor.
A/C Amplifier Circuit (MR2)
Disconnect wiring harness from A/C amplifier. A/C amplifier is located behind glove box. Check for continuity between harness connector terminals and ground under conditions specified. See A/C AMPLIFIER CIRCUIT TEST (MR2) TABLE. (Scheme 1)
| Wiring Harness Terminal Check | Condition | Specification |
|---|
| No. 3 - Ground | Always | Continuity |
| No. 4 - Ground | Ignition On | Battery Voltage |
| No. 9 - No. 15 | 185°F (85°C) (1) | 1350 Ohms |
| No. 9 - No. 15 | 194°F (90°C) (1) | 1190 Ohms |
| No. 9 - No. 15 | 203°F (95°C) (1) | 1050 Ohms |
| No. 10 - Ground | Ignition On | Battery Voltage |
| No. 13 - Ground | Always | Continuity |
| (1) Coolant temperature. |
A/C AMPLIFIER CIRCUIT TEST (MR2)
Scheme 1
Cooling Fan ECU Circuit (Camry V6 & MR2 Turbo)
- Disconnect wiring harness from cooling fan ECU. On Camry V6, radiator cooling fan ECU is located under right side of dash, behind glove box. On MR2 Turbo, engine compartment cooling fan ECU is located on rear wall of engine compartment.
- Check for continuity between wiring harness terminals and ground under conditions specified. See COOLING FAN ECU CIRCUIT TEST (CAMRY V6 & MR2 TURBO) TABLE. (Scheme 2)or (Scheme 3).
Note. Cooling fan ECU controls radiator cooling fan on Camry V6 and engine compartment cooling fan on MR2 turbo.
| Wiring Harness Terminal Check | Condition | Specification |
|---|
| Camry V6 |
| No. 2-Ground | Always | Continuity |
| No. 3-Ground | Ignition On | Battery Voltage |
| No. 4-Ground | Ignition On | Battery Voltage |
| No. 5-No. 7 | 176°F (80°C) (1) | 1530 Ohms |
| No. 5-No. 7 | 194°F (90°C) (1) | 1180 Ohms |
| No. 5-No. 7 | 203°F (95°C) (1) | 1030 Ohms |
| No. 6-Ground | Always | Continuity |
| MR2 Turbo |
| No. 1 - Ground | Always | Continuity |
| No. 2 - Ground | Ignition On | Battery Voltage |
| No. 3 - Ground | Ignition On | Battery Voltage |
| No. 5 - No. 6 | 68°F (20°C) (2) | 2450 Ohms |
| No. 5 - No. 6 | 136°F (58°C) (2) | 630 Ohms |
| No. 5 - No. 6 | 176°F (80°C) (2) | 320 Ohms |
| No. 7 - Ground | Ignition On | Battery Voltage |
| No. 9 - Ground | Ignition On | Battery Voltage |
| (1) Coolant temperature. (2) Engine compartment temperature. |
| (2) | Engine compartment temperature. |
COOLING FAN ECU CIRCUIT TEST (CAMRY V6 & MR2 TURBO)
Scheme 2
Scheme 3
Cooling Fan Motor (Camry, Celica, Corolla, Land Cruiser, MR2 & Tercel)
- On Land Cruiser, remove shroud from fan motor. On all models, disconnect wiring harness from fan motor.
- Connect battery and ammeter to fan motor. Fan should operate smoothly and amperage draw should be within range. See COOLING FAN MOTOR AMPERAGE DRAW SPECS. TABLE.
| Model | Amps |
|---|
| Camry |
| 4-Cylinder |
| 2WD M/T | 3.2-4.4 |
| 2WD A/T | 5.8-7.4 |
| 4WD | 8.8-10.8 |
| V6 |
| Cooling Fan No. 1 (Driver's Side) | 12.1-15.1 |
| Cooling Fan No. 2 | 6.0-7.4 |
| Celica |
| 3S-GTE Engine | 8.8-10.8 |
| 4A-FE & 5S-FE Engines | 5.8-7.4 |
| Corolla |
| Coupe | 8.8-10.8 |
| All Others | 5.8-7.4 |
| Land Cruiser | 2.8-3.8 |
| MR2 |
| Radiator Cooling Fans |
| A/T | 8.8-10.8 |
| M/T | 5.8-7.4 |
| Engine Compartment Cooling Fan | 3.1-4.3 |
| Tercel |
| A/T | 8.8-10.8 |
| M/T | 6.0-7.4 |
COOLING FAN MOTOR AMPERAGE DRAW SPECS.
Cooling Fan Relay(s) (Camry, Celica, Corolla, Land Cruiser, MR2 & Tercel)
- Disconnect wiring harness from cooling fan relay. On Land Cruiser, cooling fan relay is located behind driver's side kick panel. On all other models, cooling fan relay is located in engine compartment relay/fuse box.
- Check continuity between relay terminals as shown. (Scheme 4)-8. Replace relay if continuity is not as specified.
Note. MR2 fan main relay may be tested using engine main relay test procedure. (Scheme 10)
Scheme 4
Scheme 5
Scheme 6
Scheme 7
Scheme 8
Cooling Fan Relay Circuit (Land Cruiser)
Disconnect wiring harness from cooling fan relay. Cooling fan relay is located behind passenger's side kick panel. Check for continuity between terminals and ground under conditions specified. See COOLING FAN RELAY CIRCUIT TEST (LAND CRUISER) TABLE. (Scheme 9)
| Wiring Harness Terminal Check | Condition | Specification |
|---|
| No. 1 - Ground | Always | Battery Voltage |
| No. 2 - Ground | Always | Continuity |
| No. 3 - Ground | Ignition On | Battery Voltage |
| No. 5 - Ground | Always | Continuity |
| No. 6 - Ground | Fan Inoperative | Battery Voltage |
COOLING FAN RELAY CIRCUIT TEST (LAND CRUISER)
Scheme 9
COOLANT TEMPERATURE SENSOR (CAMRY V6 & MR2)
- Remove sensor from vehicle. Coolant temperature sensor is located in upper radiator hose coolant inlet on engine.
- Using ohmmeter, measure resistance between sensor terminals while heating sensor in coolant. See COOLANT TEMP. SENSOR RESISTANCE (CAMRY V6 & MR2) TABLE.
| Temperature °F (°C) | Ohms |
|---|
| Camry V6 |
| 176 (80) | 1530 |
| 194 (90) | 1180 |
| 203 (95) | 1030 |
| MR2 |
| 185 (85) | 1350 |
| 194 (90) | 1190 |
| 203 (95) | 1050 |
COOLANT TEMP. SENSOR RESISTANCE (CAMRY V6 & MR2)
Coolant Temperature Switch (Camry 4-Cylinder, Celica, Corolla & Tercel)
- Remove switch from vehicle. Coolant temperature switch is located in upper radiator hose coolant inlet on engine. Most switches have a single terminal. Some switches have 2 terminals.
- Place switch in container of coolant and heat container. Using ohmmeter, ensure continuity is correct between wire connector and switch body or between both terminals. See COOLANT TEMP. SWITCH CONTINUITY SPECS. TABLE.
| Model | No Continuity °F (°C) | Continuity °F (°C) |
|---|
| Camry (4-Cyl.), Celica & Corolla | Above 199 (93) | Below 181 (83) |
| Tercel | Above 201 (94) | Below 181 (89) |
| (1) As measured between wire connector and switch body or between switch terminals. |
| (1) | As measured between wire connector and switch body or between switch terminals. |
COOLANT TEMPERATURE SWITCH CONTINUITY SPECS. (1)
Engine Compartment Temperature Sensor (MR2 Turbo)
Remove sensor from forward section of engine compartment. Using ohmmeter, measure resistance between sensor terminals while heating sensor in water. See ENGINE COMPARTMENT TEMP. SENSOR RESISTANCE (MR2 TURBO) TABLE.
| Temperature °F (°C) | Ohms |
|---|
| 68 (20) | 2450 |
| 136 (58) | 630 |
| 176 (80) | 320 |
ENGINE COMPARTMENT TEMP. SENSOR RESISTANCE (MR2 TURBO)
Engine Main Relay (Camry, Celica, Corolla, MR2 & Tercel)
Engine main relay supplies power to cooling fan relay. Disconnect wiring harness from engine main relay. Relay is located in engine compartment relay/fuse box. Check continuity between relay terminals as shown. (Scheme 10)
Note. Engine main relay may be called ignition main relay on MR2.
Scheme 10
Scheme 10: Engine Main Relay (Camry, Celica, Corolla, MR2 & Tercel)
Manifold Temperature Sensor (Land Cruiser)
- Manifold temperature sensor is located on intake manifold (single Blue wire). Remove sensor from intake manifold.
- Heat sensor slowly in water while checking continuity between wire terminal and sensor body. See MANIFOLD TEMP. SENSOR RESISTANCE (LAND CRUISER) TABLE. Replace sensor if resistance is not as specified.
| Temperature °F (°C) | Ohms |
|---|
| 194 (90) | Approximately 4000 |
| 230 (110) | Approximately 2000 |
MANIFOLD TEMP. SENSOR RESISTANCE (LAND CRUISER)
BELT ADJUSTMENT
| Application | New Belt | Used Belt |
|---|
| Camry |
| Alternator |
| Without A/C | 125 (57) | 95 (43) |
| With A/C | 175 (79) | 130 (59) |
| P/S | 125 (57) | 80 (36) |
| Celica |
| 3S-GTE Engine |
| Alternator |
| With A/C | 175 (79) | 115 (52) |
| Without A/C | 150 (68) | 130 (59) |
| P/S | 125 (57) | 80 (36) |
| 4A-FE Engine |
| Alternator | 160 (73) | 130 (59) |
| A/C Compressor | 160 (73) | 100 (45) |
| P/S | 125 (57) | 80 (36) |
| 5S-FE Engine |
| Alternator |
| With A/C | 175 (79) | 130 (59) |
| Without A/C | 125 (57) | 95 (43) |
| P/S | 125 (57) | 80 (36) |
| Corolla |
| 4A-FE |
| A/C | 160 (73) | 100 (45) |
| Alternator | 160 (73) | 130 (59) |
| P/S | 100 (45) | 55 (25) |
| 4A-GE |
| A/C & P/S | 165 (75) | 90 (41) |
| Alternator | 175 (79) | 115 (52) |
| MR2 |
| Alternator | 120 (54) | 104 (47) |
| A/C | 160 (73) | 100 (45) |
| Pickup & 4Runner | 125 (57) | 80 (36) |
| Previa |
| Alternator & P/S | 170 (77) | 125 (57) |
| A/C | 140 (64) | 120 (54) |
| Tercel |
| A/C Only | 165 (75) | 110 (50) |
| All Others | 160 (73) | 100 (45) |
| (1) Tension in lbs. (kg) using Burroughs tension gauge. |
| (1) | Tension in lbs. (kg) using Burroughs tension gauge. |
ENGINE BELT ADJUSTMENT (4-CYLINDER) (1)
| Application | New Belt | Used Belt |
|---|
| Camry V6 Alternator | 175 (79) | 115 (52) |
| P/S | 125 (57) | 80 (36) |
| Cressida |
| Alternator | 175 (79) | 115 (52) |
| A/C | 160 (73) | 105 (48) |
| P/S | 160 (73) | 100 (45) |
| Land Cruiser |
| A/C | 125 (57) | 80 (36) |
| Alternator & P/S | 145 (66) | 100 (45) |
| Pickup & 4Runner V6 |
| Alternator | 160 (73) | 100 (45) |
| A/C & P/S | 125 (57) | 80 (36) |
| Supra |
| Alternator | 175 (79) | 115 (52) |
| A/C & P/S | 160 (73) | 105 (48) |
| (1) Tension in lbs. (kg) using Burroughs tension gauge. |
| (1) | Tension in lbs. (kg) using Burroughs tension gauge. |
ENGINE BELT ADJUSTMENT (6-CYLINDER & V6) (1)
COOLING SYSTEM SPECIFICATIONS
| Application | Specification |
|---|
| Coolant Replacement Interval |
| First Service | 45,000 Miles or 36 Months |
| Subsequent Servicing | 30,000 Miles or 24 Months |
| Coolant Capacity |
| Camry |
| 2WD | 6.8 Qts. (6.4L) |
| 4WD | 7.2 Qts. (6.8L) |
| Celica |
| 3S-GTE | 6.9 Qts. (6.5L) |
| 4A-FE |
| A/T | 5.9 Qts. (5.6L) |
| M/T | 5.5 Qts. (5.2L) |
| 5S-FE |
| A/T | 6.4 Qts. (6.1L) |
| M/T | 6.6 Qts. (6.2L) |
| Corolla |
| 4A-FE | 6.5 Qts. (6.2L) (2) |
| 4A-GE | 6.3 Qts. (6.0L) |
| MR2 |
| 3S-GTE | 14.4 Qts. (13.6L) |
| 5S-FE | 13.7 Qts. (13.0L) |
| Pickup & 4Runner |
| 4WD A/T | 9.6 Qts. (9.1L) |
| All Others | 8.9 Qts. (8.4L) |
| Previa | 12.3 Qts. (11.6L) |
| Tercel |
| A/T | 5.7 Qts. (5.4L) |
| M/T | 5.2 Qts. (4.9L) |
| Pressure Cap Standard Opening Pressure | 10.7-14.9 psi |
| Thermostat Opens (1) |
| Camry (4-Cyl.), Celica, Corolla, MR2, Previa & Tercel | 176-183°F (80-84°C) |
| Pickup & 4Runner (4-Cyl.) | 187-194°F (86-90°C) |
| (1) If thermostat is equipped with a "jiggle valve" on its flange, install "jiggle valve" properly. On Camry, Celica, MR2, Previa and Tercel, align "jiggle valve" with protrusion on thermostat housing. On Corolla, align "jiggle valve" with stud bolt or above water inlet housing. (2) Some models have a coolant capacity of 5.9 Qts. (5.6L). |
| (1) | If thermostat is equipped with a "jiggle valve" on its flange, install "jiggle valve" properly. On Camry, Celica, MR2, Previa and Tercel, align "jiggle valve" with protrusion on thermostat housing. On Corolla, align "jiggle valve" with stud bolt or above water inlet housing. |
| (2) | Some models have a coolant capacity of 5.9 Qts. (5.6L). |
ENGINE COOLING SYSTEM SPECS. (4-CYL)
| Application | Specification |
|---|
| Coolant Replacement Interval |
| First Service | 45,000 Miles or 36 Months |
| Subsequent Servicing | 30,000 Miles or 24 Months |
| Coolant Capacity |
| Camry V6 | 10.0 Qts. (9.5L) |
| Cressida | 8.8 Qts. (8.3L) |
| Land Cruiser |
| Without Rear Heater | 18.5 Qts. (17.5L) |
| With Rear Heater | 20.6 Qts. (19.5L) |
| Pickup & 4Runner V6 |
| A/T | 10.9 Qts. (10.3L) |
| M/T | 11.1 Qts. (10.5L) |
| Supra | 8.6 Qts. (8.1L) |
| Pressure Cap Standard Opening Pressure | 10.7-14.9 psi |
| Thermostat Opens (1) |
| Camry V6, Pickup & 4Runner | 176-183°F (80-84°C) |
| Cressida, Land Cruiser & Supra | 187-194°F (86-90°C) |
| (1) If thermostat is equipped with a "jiggle valve" on its flange, ensure "jiggle valve" is installed at 12 o'clock (straight-up) position. This applies to engines where thermostat flange is vertical when installed. |
| (1) | If thermostat is equipped with a "jiggle valve" on its flange, ensure "jiggle valve" is installed at 12 o'clock (straight-up) position. This applies to engines where thermostat flange is vertical when installed. |
ENGINE COOLING SYSTEM SPECS. (6-CYL & V6)
