Technical Information
Figure 080-11: Circuit Test Path for F51 (Testing State)
Cause:
Heater relay defective; contact open.
Remedy:
Replace the heater relay. See Section 050-4.10.
Cause:
Heater relay solenoid defective.
Remedy:
Replace the heater relay. See Section 050-4.10.
Cause:
Connection from heater relay to electronic is open-circuited.
Remedy:
1. Check plug connections. Ensure that all plug connections are clean and
secure.
2. Check the connection wires for continuity.
Cause:
Heater pressure switch open- or short-circuited.
Remedy:
1. Ensure that the heater pressure switch is in positions 21/22 and 11/12. If
not, perform the following checks:
a. Ensure that all plug connections are clean and secure.
b. Check the connection wires for continuity.
c. Remove the heater pressure switch (Section 050-4.16) and check for
any blockages.
2. If the heater pressure switch still shows an open circuit, replace it.
Cause:
Foreign objects in heater pressure switch.
Remedy:
Replace the heater pressure switch. See Section 050-4.16.
142
G 5xxx