2002 NISSAN TERRANO Service Repair Manual

Overall Function Check
Use this procedure to check the overall function of the cooling fan.
During this check, a DTC might not be confirmed.
WARNING:
Never remove the radiator cap when the engine is hot. Serious
burns could be caused by high pressure fluid escaping from
the radiator.
Wrap a thick cloth around the cap. Carefully remove the cap
by turning it a quarter turn to allow built-up pressure to
escape. Then turn the cap all the way off.
WITH CONSULT-II
1) Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to ªDiagnos-
tic Procedureº, EC-114.
2) Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to ªDiagnos-
tic Procedureº, EC-114.
3) Turn ignition switch ªONº.
4) Perform ªCOOLING FANº in ªACTIVE TESTº mode with CON-
SULT-II and make sure that cooling fans operate when touch-
ing ªHIGHº or ªLOWº.
If NG, go to ªDiagnostic Procedureº, EC-114.
WITHOUT CONSULT-II
1) Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to ªDiagnos-
tic Procedureº, EC-114.
2) Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to ªDiagnos-
tic Procedureº, EC-114.
3) Disconnect engine coolant temperature sensor harness con-
nector.
4) Connect 150Wresistor to engine coolant temperature sensor
harness connector.
5) Start engine and make sure that cooling fan operates.
Be careful not to overheat engine.
6) If NG, go to ªDiagnostic Procedureº, EC-114.
AEC640
SEF111X
MEC475B
DTC 0208 OVER HEATZD30DDTi
EC-111

Wiring Diagram
LHD MODELS
YEC179A
DTC 0208 OVER HEATZD30DDTi
EC-112

RHD MODELS
YEC180A
DTC 0208 OVER HEATZD30DDTi
Wiring Diagram (Cont'd)
EC-113

Diagnostic Procedure
1 INSPECTION START
Do you have CONSULT-II?
YesorNo
Ye sEGO TO 2.
NoEGO TO 3.
2 CHECK COOLING FAN OPERATION
With CONSULT-II
1. Turn ignition switch ªONº.
2. Perform ªCOOLING FANº in ªACTIVE TESTº mode with CONSULT-II.
SEF646X
3. Make sure that cooling fan operates.
OK or NG
OKEGO TO 12.
NGEGO TO 4.
3 CHECK COOLING FAN OPERATION
Without CONSULT-II
1. Turn ignition switch ªOFFº.
2. Disconnect engine coolant temperature sensor harness connector.
3. Connect 150Wresistor to engine coolant temperature sensor harness connector.
4. Restart engine and make sure that cooling fan operates.
MEC475B
OK or NG
OKEGO TO 12.
NGEGO TO 4.
DTC 0208 OVER HEATZD30DDTi
EC-114

4 CHECK COOLING FAN POWER SUPPLY CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect cooling fan relay.
MEC021E
3. Turn ignition switch ªONº.
4. Turn air conditioner switch ªONº.
5. Turn blower fan switch ªONº.
6. Make sure that cooling fan operates.
7. Check voltage between cooling fan relay terminals 2, 3 and ground with CONSULT-II or tester.
MEC974DVoltage: Battery voltage
OK or NG
OKEGO TO 6.
NGEGO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
I10A fuse
IHarness connector F120, M812 (LHD models)
IA/C relay
I30A fusible links
IHarness for open or short between cooling fan relay and fuse
IHarness for open or short between cooling fan relay and battery
ERepair open circuit or short to ground or short to power in harness or connectors.
DTC 0208 OVER HEATZD30DDTi
Diagnostic Procedure (Cont'd)
EC-115

6 CHECK COOLING FAN GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect cooling fan motor harness connector.
MEC024E
3. Check harness continuity as follows. Refer to Wiring Diagram.
MTBL13224. Also check harness for short to ground and short to power.
OK or NG
OKEGO TO 8.
NGEGO TO 7.
7 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors M785, F67 (M/T models)
IHarness for open or short between cooling fan relay and cooling fan motor
IHarness for open or short between cooling fan relay and condenser
ERepair open circuit or short to ground or short to power in harness or connectors.
8 CHECK COOLING FAN OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 14 and cooling fan relay terminal 1. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OKEGO TO 10.
NGEGO TO 9.
9 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors M787, F66
IHarness for open or short between cooling fan relay and ECM
ERepair open circuit or short to ground or short to power in harness or connectors.
DTC 0208 OVER HEATZD30DDTi
Diagnostic Procedure (Cont'd)
EC-116

10 CHECK COOLING FAN RELAY
Check continuity between cooling fan relay terminals 3 and 5 under the following conditions.
MEC975D
MTBL1319
OK or NG
OKEGO TO 11.
NGEReplace cooling fan relay.
11 CHECK COOLING FAN MOTOR
Supply battery voltage between cooling fan motor terminals 1 and 2.
MEC976DDoes the cooling fan motor operate normally?
OK or NG
OKEGO TO 12.
NGEReplace cooling fan motor.
12 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-78.
EINSPECTION END
DTC 0208 OVER HEATZD30DDTi
Diagnostic Procedure (Cont'd)
EC-117

13 CHECK COOLING SYSTEM FOR LEAK
Apply pressure to the cooling system with a tester, and check if the pressure drops.
Testing pressure: 157 kPa (1.57 bar, 1.6 kg/cm
2, 23 psi)
CAUTION:
Higher than the specified pressure may cause radiator damage.
SLC754A
Pressure should not drop.
OK or NG
OKEGO TO 15.
NGEGO TO 14.
14 DETECT MALFUNCTIONING PART
Check the following for leak.
IHose
IRadiator
IWater pump (Refer to LC section, ªWater Pumpº.)
ERepair or replace.
15 CHECK RADIATOR CAP
Apply pressure to cap with a tester and check radiator cap relief pressure.
SLC755A
Radiator cap relief pressure:
79 - 98 kPa (0.78 - 0.98 bar, 0.8 - 1.0 kg/cm2, 11 - 14 psi)
OK or NG
OKEGO TO 16.
NGEReplace radiator cap.
DTC 0208 OVER HEATZD30DDTi
Diagnostic Procedure (Cont'd)
EC-118