No
Intermittent Fault. Refer to
Yes
Step 8
Diagnostic completed.
5. Repair Instructions:
Replace EVAP solenoid valve. Refer to
Canister Solenoid Valve Replacement
2.2.7.34 DTC P0480 P0481 P0691 P0692 P0693 P0694
1. DTC Descriptor:
DTC
P0480
Cooling Fan Relay Control Circuit Open (Low Speed)
DTC
P0482
Cooling Fan Relay Control Circuit Malfunction (High Speed)
DTC
P0691
Cooling Fan Relay Control Circuit Short to Ground (Low Speed)
DTC
P0692
Cooling Fan Relay Control Circuit Short to Power Supply (Low Speed)
DTC
P0693
Cooling Fan Relay Control Circuit Short to Ground (High Speed)
DTC
P0694
Cooling Fan Relay Control Circuit Short to Power Supply (High Speed)
High or low speed cooling fan relay coil power is provided by ECM controlled main relay. ECM controls the relay via ECM harness
connector EN01 terminal No.52 and 62. ECM has an internal driver circuit that controls the relay coil ground. Drive circuit is equipped
with a feedback circuit to ECM. ECM monitors the feedback voltage control circuit to determine whether the control circuit is open,
short to ground or short to ground.
2. Conditions For Setting DTC and The Fault Location:
DTC Code
DTC Detection Strategy
Conditions For Setting The DTC
(Control Strategy)
Fault Locations
P0480
Hardware Circuit Checks
Circuit Open.
1. Relay Circuit
2. Relay
3. ECM
P0481
Hardware Circuit Checks
Circuit Open.
P0691
Hardware Circuit Checks
Circuit Short to Ground.
P0692
Hardware Circuit Checks
Circuit Short to Power Supply.
P0693
Hardware Circuit Checks
Circuit Short to Ground.
P0694
Hardware Circuit Checks
Circuit Short to Power Supply.
3. Schematic:
.
4. Diagnostic Steps:
.
Engine
Control System JL4G18-D
2-175
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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