TM 10-3930-675-24-1
COOLING FAN OPERATION AND FAN CONTROL TROUBLESHOOTING - CONTINUED
0010 00
Table 2. Error Code 167 - Cooling Fan Speed, Wiring
Circuit Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 167 - Cooling Fan Speed, Short 1. Enter "DIAG SERVO" 11(13) a. If no "OUTPUT" mA values
in the diagnostic menu and
display, enter into diagnostic
Circuit Failure.
observe the FAN "OUTPUT"
menus to check vehicle
and "INPUT" should have mA
temperature sensors for proper
values.
operation.
b. If no "INPUT" mA values
display, continue with step 2.
2. Enter
"DIAG
EXTRA a. If no voltage (10 to 22V) is
DIAG SERVO
11(13)
FUNCT" 11(13). Check
found, disconnect X158 and
OUTPUT/INPUT
FAN
0mA
0mA
voltage at X158 between pin
check the resistance on the
BL.VALVE 0.00V
0mA
10 and ground while changing
loose part of X158 between
the fan speed using the +/-
pin 9 and pin 10. Resistance
menu selection buttons (WP
should be 8 to 10 Ohms. Check
continuity of each pin to
should vary with fan speed; 10
ground.
to 22V.
b. If voltage (10-22V) is found,
disconnect
ECU
(790)
connector 2 and check pin 13
for damage and check
continuity of wire A15810 and
continuity of wire to ground
(WP 0048 00-8).
c. Repair or replace damaged,
shorted wires or connectors
(WP 0113 00).
d. Replace damaged ECU (790)
(WP 0080 00).
3. Remove the rear radiator top a. If resistance (8 to 10 Ohms) is
grating to access to the cooling
not as specified or shorted to
fan flow control valve. Unplug
ground, replace the cooling
the harness and check the
fan flow control valve (WP
resistance of the valve solenoid
0263 00).
(6037). Should be 8 to 10 b. If specified resistance is found,
Ohms. Check solenoid for
check continuity of wires 1589
short to ground.
and 15810 (WP 0048 00-8).
c. Replace damaged open or
shorted harness (WP 0113 00).
0010 00-3
