It could be the heating element or the Driver heated seat module ! Do you know anything about automotive electronic's ? Circuit testing with a DMM - digital multi-meter ? This system has a element in the seat an the back . None work ?
- Circuitry open/shorted.
- Damaged heated seat heater elements.
- Damaged heated seat module.
- Damaged heated seat switch.
PINPOINT TEST G: HEATED SEAT INOPERATIVE
G1 TEST HEATER ELEMENTS
- Disconnect connectors C352 LH ( C356 RH) at heater modules.
- Using an ohmmeter, measure resistance of heater elements according to the following chart:
Connectors C352 LH; 356 RH
Pin
Circuit
Pin
Circuit
12
1067 (P/LB)
9
1066 (GY/LB)
Is resistance of elements 2.5-10 ohms?
Yes
No
GO to
G2 .
GO to
G4 .
The seat heater module is under the driver seat .
G2 TEST HEAT SENSORS FOR OPEN CIRCUIT
- Using an ohmmeter, measure the resistance of sensors according to the following chart:
Connectors C352 LH; 356 RH
Pin
Circuit
Pin
Circuit
11
1063 (O/LB)
10
1062 (R/LB)
6
1061 (BR/LB)
Is resistance more than 10,000 ohms?
Yes
No
REPLACE trim covers. RESTORE vehicle. RETEST system.
GO to
G3 .
G3 TEST HEAT SENSORS FOR SHORT CIRCUIT
- Using an ohmmeter connected to a known good ground measure resistance of Circuit 1063 (O/LB) at Pin C352 LH; Pin C356 RH.
- Measure resistance of Circuit 1061 (BR/LB) at Pin C352 and Pin C356 .
Is resistance 0 ohms?
Yes
No
REPLACE trim covers. RESTORE vehicle. RETEST system.
GO to
G6 .
G4 TEST CIRCUITS BETWEEN HEATER MODULE AND HEATING ELEMENT CONNECTOR
- Disconnect connectors C353 and C351 LH.
- Disconnect connectors C355 and C354 RH.
- Using an ohmmeter, measure resistance of circuits between module connector and heater element connector according to the following chart:
Connectors C352 LH; 356 RH
Pin
Circuit
Pin
Circuit
12
1067 (P/LB)
11
1063 (O/LB)
6
1061 (BR/LB)
10
1062 (R/LB)
9
1066 (GY/LB)
Is resistance less than 5 ohms?
Yes
No
GO to
G5 .
SERVICE suspect circuit for open. RESTORE vehicle. RETEST system.
G5 TEST HEAT ELEMENT AND SENSOR CIRCUITS FOR SHORT TO GROUND
- Refer to Circuit charts in G4.
- Using an ohmmeter connected to known good ground, check resistance of circuits.
Is resistance less than 10 K ohms?
Yes
No
SERVICE suspect circuit for short to ground. RESTORE vehicle. RETEST system.
Circuits satisfactory. REPLACE trim cover.
G6 TEST HEATED SEAT SWITCH POSITION 1
- Disconnect connector C352 LH ( C356 RH).
- Make sure switch is in position 1.
- Using an ohmmeter measure resistance between Pin C352 , Circuit 1018 (LG/O) and Pin C352 , Circuit 1019 (T/LB).
- Measure resistance between Pin C356 , Circuit 579 (BK/O) and Pin C356 , Circuit 580 (BR).
Is resistance between 2.0 K and 2.75 K ohms?
Yes
No
GO to
G7 .
GO to
G14 .
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