SEATS > Seat Heater System
INSPECTION
1. WIRING DIAGRAM
Refer to “Seat Heater System” in the wiring diagram. Seat Heater System > WIRING DIAGRAM">
2. DIAGNOSTIC CHART
Symptoms | Repair order |
Seat heater does not operate. | 1. Check the fuse. Seat Heater System > INSPECTION"> |
2. Check the seat heater relay. Seat Heater System > INSPECTION"> | |
3. Check the seat heater system power supply and ground circuit. Seat Heater System > INSPECTION"> | |
4. Check the seat heater module. Seat Heater System > INSPECTION"> | |
5. Check the seat heater switch circuit. Seat Heater System > INSPECTION"> |
3. CHECK SEAT HEATER FUSE
Remove the seat heater fuse and inspect visually.
Is the fuse blown out?
• Yes > Replace the fuse.
• No > Check the power supply and ground circuits.
4. CHECK SEAT HEATER RELAY
1. Remove the seat heater relay from the relay holder.
2. Measure the resistance between seat heater relay terminals.
Preparation tool: Circuit tester
Terminal No. | Inspection conditions | Standard | Circuit |
36 — 37 | Always | 1 M? or more |
36 — 37
Apply battery voltage between terminals 38 — 39.
Less than 1 ?
3. Replace the seat heater relay if the inspection result is not within the standard.
5. CHECK POWER SUPPLY AND GROUND CIRCUIT
1. Check power supply circuit
(1) Disconnect the harness connector of seat heater switch.
(2) Turn the ignition switch to ON.
(3) Measure the voltage between harness connector terminal and chassis ground.
Connector & terminal
(R43) No. 7 (+) — Chassis ground (−):
Is the voltage 12 V or more?
• Yes > Go to step 2.
• No > Check the harness between the seat heater switch and fuse.
2. Check ground circuit
Measure the resistance between harness connector terminal and chassis ground.
Connector & terminal
(R43) No. 2 — Chassis ground:
Is the resistance less than 10 ??
• Yes > Go to step 3.
• No > Repair the harness.
3. Check ground circuit
Measure the resistance between seat heater switch terminals.
Connector & terminal
(R43) No. 7 — (R43) No. 2:
Is the resistance less than 10 ??
• Yes > The power supply and ground circuits are normal.
• No > Replace the seat heater switch.
6. SEAT HEATER UNIT
1. Disconnect the seat heater unit connector, and check the continuity between terminals of connector.
Connector & terminal
HI
No. 1 — No. 3:
No. 3 — No. 4:
LOW
No. 1 — No. 4:
2. If no continuity exists, replace the seat heater module with a new part.
7. SEAT HEATER SWITCH
1. Inspect the continuity between the seat heater switch terminals.
Connector & terminal
HI
No. 7 — No. 2:
No. 7 — No. 4:
No. 7 — No. 8:
LOW
No. 7 — No. 1:
No. 7 — No. 2:
No. 7 — No. 3:
2. If no continuity exists, replace the seat heater switch with a new part.
Installation
SEAT BELT SYSTEM > Front Seat BeltINSTALLATION1. SEAT BELT OUTER - FRONTCAUTION:• The parts of the driver and passenger sides are not the same. Before installation, make sure that the correct part is used.• During installation, make sure that the seat belts are not twisted.• Aft ...
Wiring diagram
SECURITY AND LOCKS > Keyless Access SystemWIRING DIAGRAMFor wiring diagrams related to the keyless access system, refer to the following items.• Keyless access system: Keyless Access System > WIRING DIAGRAM">• Push button start system: Push Button Start System > WIRING ...
Dtc b2a0c dcm internal fault
TELEMATICS SYSTEM (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC B2A0C DCM INTERNAL FAULTDIAGNOSIS START CONDITION:When ignition switch is ON.DTC DETECTING CONDITION:• Main microcomputer and communication circuit IC cannot communicate. (Defective IPC)• SIM ...