Cooling Fan and/or Additional Fan Does Not Operate
COOLING FAN AND/OR ADDITIONAL FAN DOES NOT OPERATENORMAL OPERATION OF COOLING FANS
Turbo with MTX and all EC-AT models
The cooling fan (main fan) comes on when the coolant temperature reaches 97°C (206°F). If the coolant reaches 108°C (226°F) both the cooling fan and the additional fan will operate. When the A/C is turned on, the cooling fan will engage but the additional fan will not engage unless the refrigerant pressure in the A/C system reaches 1,472 kPa (15 kg/cm2, 213 psi) or the engine coolant temperature reaches 108°C (226°F).
Non-Turbo with MTX model
The cooling fan comes on when the coolant temperature reaches 97°C (206°F). When the A/C is turned on, the additional fan comes on regardless of coolant temperature.
Note: If the magnetic clutch does not work when the engine is running, (while A/C and blower fan switches are turned ON), see "Compressor does not run (Magnetic clutch does not engage)" before proceeding.
Warning: Keep hands, hair, clothing, etc. away from the fans while performing the following steps; the fan may engage.
Step 1
Check that the following fuses are OK
Step 2
Prepare the vehicle for testing by conducting the following procedures:
1. Turn A/C switch ON.
2. Turn blower switch ON.
3. Turn ignition switch ON (engine off).
Step 3 (except Non-Turbo with MTX)
Disconnect water thermoswitch No.2 connector F-14 and ground terminal-wire (L).
Step 4
Check the voltage at terminal-wire (Y) of cooling fan motor connector F-09.
Step 5
Ground terminal-wire (L/Y) (EC-AT: (L/B)) at cooling fan motor connector F-09.
Step 6 (only EC-AT)
Ground and then unground the following terminal-wires at cooling fan relay No.3 connector F-13.
Step 7 (only Non-Turbo with MTX)
Check the voltage at terminal-wire (G/W) of connector FAC2-O1.
Step 8
Ground the following terminal-wires at connector FAC2-O1.
Note: Replacement of diodes is not available. If the diodes are broken, replace wiring harness.
Step 9 (except Non-Turbo with MTX)
Disconnect pressure switch No.2 connector AC2-06 and use a jumper wire across the terminals.
Step 10 (except Non-Turbo with MTX)
Warning: Stop the engine if the pressure on the manifold gauge reaches 1,570 kPa (16 kg/cm2, 228 psi).
Install a manifold gauge set. Disconnect the cooling fan connector F-09. Start the engine and observe the refrigerant pressure.
Check that additional fan operates as specified.
Step 11 (except Non-Turbo with MTX)
Ground terminal-wire (W/G) at pressure switch No.2.
Step 12
Check the voltage at terminal-wire (Y/W) of additional fan connector A02-08.
Note: Replacement of diodes is not available. If the diodes are broken, replace wiring harness.
Step 13
Ground terminal-wire (B) of additional fan connector AC2-08.
Step 14
Checking of additional fan motor
1. Disconnect the fan motor connector.
2. Connect an ammeter and a battery to the fan connector.
3. Check that the fan motor operates smoothly and at the specified current.
Current:
- Turbo with MTX and all EC-AT: 6.7 - 10 A
- Non-Turbo with MTX: 4.5 - 5.5 A
Step 15
Check the voltage at terminal-wire (B/R) of FAC2-O1 connector.
Step 16
Inspection of relays (Non-Turbo with MTX)
(Cooling fan relay No.2 and additional fan relay No.1)
1. Disconnect the connector from the suspected faulty relay.
2. Check for continuity between terminals 3 and 4 of the relay with an ohmmeter.
3. Apply 12V to terminal 1 and ground terminal 2. Check for continuity between terminals 3 and 4 with an ohmmeter.
Inspection of relays (Turbo with MTX and all EC-AT)
(Cooling fan relay No.2 and additional fan relays No.1 and No.2)
1. Disconnect the connector from the suspected faulty relay.
2. Check for continuity between the terminals 3 and 4 of the relay with an ohmmeter.
3. Apply 12V to terminal 1 and ground terminal 2. Check for continuity between terminals 3 and 4 with an ohmmeter.