PRE-CRASH SAFETY SYSTEM Heater Relay Circuit
| DTC Code | DTC Name |
|---|---|
| Heater Relay Circuit |
DESCRIPTION
The pre-crash safety city sensor controls the TSS C HTR relay to turn the pre-crash safety city heater on and off.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
CHECK HARNESS AND CONNECTOR (PRE-CRASH SAFETY CITY HEATER POWER SOURCE CIRCUIT)
-
*a
Front view of wire harness connector
(to Pre-crash Safety City Heater Wire)
Disconnect the M6 pre-crash safety city heater wire connector.
Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection
Condition
Specified Condition
M6-1 - Body ground
Ignition switch ON
11 to 14 V
Ignition switch off
Below 1 V
Connect the M6 pre-crash safety city heater wire connector.
Result
Proceed to
OK
NG
NG REPAIR OR REPLACE HARNESS OR CONNECTOR (PRE-CRASH SAFETY CITY HEATER POWER SOURCE CIRCUIT)
-
INSPECT PRE-CRASH SAFETY CITY HEATER WIRE
-
*a
Rear view of wire harness connector
(to Pre-crash Safety City Heater Wire)
Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection
Condition
Specified Condition
M6-2 - Body ground
Ignition switch ON
11 to 14 V
Ignition switch off
Below 1 V
Result
Proceed to
OK
NG
NG INSPECT PRE-CRASH SAFETY CITY HEATER WIREClick here
-
INSPECT TSS C HTR RELAY
Remove the TSS C HTR relay.
Inspect the TSS C HTR relay.
Install the TSS C HTR relay.
Result
Proceed to
OK
NG
NG REPLACE TSS C HTR RELAY
CHECK HARNESS AND CONNECTOR (PRE-CRASH SAFETY CITY HEATER WIRE - TSS C HTR RELAY AND PRE-CRASH SAFETY CITY SENSOR)
Turn the ignition switch off.
Disconnect the M6 pre-crash safety city heater wire connector.
Disconnect the M4 pre-crash safety city sensor connector.
Remove the TSS C HTR relay.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
M6-2 - TSS C HTR relay holder terminal 3
Always
Below 1 Ω
M6-2 - M4-1 (SPR)
Always
Below 1 Ω
M4-1 (SPR) - TSS C HTR relay holder terminal 3
Always
Below 1 Ω
M6-2, M4-1 (SPR) or TSS C HTR relay holder terminal 3 - Body ground
Always
10 kΩ or higher
Install the TSS C HTR relay.
Connect the M4 pre-crash safety city sensor connector.
Connect the M6 pre-crash safety city heater wire connector.
Result
Proceed to
OK
NG
NG REPAIR OR REPLACE HARNESS OR CONNECTOR (PRE-CRASH SAFETY CITY HEATER WIRE - TSS C HTR RELAY OR PRE-CRASH SAFETY CITY SENSOR)
CHECK HARNESS AND CONNECTOR (TSS C HTR RELAY - BODY GROUND)
Remove the TSS C HTR relay.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
TSS C HTR relay holder terminal 5 - Body ground
Always
Below 1 Ω
Install the TSS C HTR relay.
Result
Proceed to
OK
NG
NG REPAIR OR REPLACE HARNESS OR CONNECTOR (TSS C HTR RELAY - BODY GROUND)
INSPECT PRE-CRASH SAFETY CITY HEATER WIRE
Remove the pre-crash safety city heater wire.
-
*a
Component without harness connected
(Pre-crash Safety City Heater Wire)
A
Terminal (Wiring Color "R")
B
Terminal (Wiring Color "W-B")
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
M6-1 - A
Always
Below 1 Ω
M6-2 - B
Always
Below 1 Ω
M6-1 or A - Body ground
Always
10 kΩ or higher
M6-2 or B - Body ground
Always
10 kΩ or higher
Install the pre-crash safety city heater wire.
Result
Proceed to
OK
NG