Pinpoint Test X: The Heated Seat Does Not Operate Correctly - Right Rear Seat Does Heat But The Heated Seat Indicator Does Not

Seats

Pinpoint Tests

Pinpoint Test X: The Heated Seat Does Not Operate Correctly - Right Rear Seat Does Heat but the Heated Seat Indicator Does Not Illuminate When Pressed

Refer to Wiring Diagram Set 119, Climate Controlled Seats for schematic and connector information. Diagrams By Number

Normal Operation

Pressing the right rear heated seat switch once in either the high or low mode will commanded on the right rear heated seat. Voltage is then supplied to the right rear heated seat switch from the heated seat module on either circuit CHS52 (BU) (high heat mode) or circuit CHS53 (WH/BN) (low heat mode) illuminating the switch indicator. Pressing the right rear heated seat switch again in the mode that is currently on will set the right rear heated seat to off and also turn that LED off.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Heated seat switch
- Heated seat module



PINPOINT TEST X: THE HEATED SEAT DOES NOT OPERATE CORRECTLY - RIGHT REAR SEAT DOES HEAT BUT THE HEATED SEAT INDICATOR DOES NOT ILLUMINATE WHEN PRESSED

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X1 CHECK THE REAR HEATED SEAT INDICATOR CIRCUITS FOR A SHORT TO GROUND


- Disconnect: Right Rear Heated Seat Switch C3341.
- Disconnect: Heated Seat Module C3162.
- Measure the resistance between heated seat module:
- C3162-3, circuit CHS53 (WH/BN), harness side and ground.
- C3162-6, circuit CHS52 (BU), harness side and ground.




- Are the resistances greater than 10,000 ohms?

Yes
GO to X2.

No
REPAIR the affected circuit. TEST the system for normal operation.

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X2 CHECK THE REAR HEATED SEAT INDICATOR CIRCUITS FOR AN OPEN


- Measure the resistance between:
- right rear heated seat switch C3341-4, circuit CHS53 (WH/BN), harness side and heated seat module C3162-3, circuit CHS53 (WH/BN), harness side.
- right rear heated seat switch C3341-3, circuit CHS52 (BU), harness side and heated seat module C3162-6, circuit CHS52 (BU), harness side.




- Are the resistances less than 5 ohms?

Yes
GO to X3.

No
REPAIR the affected circuit. TEST the system for normal operation.

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X3 CHECK THE REAR HEATED SEAT HIGH INDICATOR


- Connect: Right Rear Heated Seat Switch C3341.
- Ignition ON.
- Connect a fused jumper lead between heated seat module C3162-6, circuit CHS52 (BU), harness side and C3162-1, circuit SBB05 (GY/RD), harness side.




- Does the high indicator LED illuminate on the right rear heated seat switch?

Yes
GO to X4.

No
INSTALL a new rear heated seat switch. REFER to Heated Seat Switch - Rear Heated Seat Switch - Rear. TEST the system for normal operation.

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X4 CHECK THE REAR HEATED SEAT LOW INDICATOR


- Connect a fused jumper lead between heated seat module C3162-3, circuit CHS53 (WH/BN), harness side and C3162-1, circuit SBB05 (GY/RD), harness side.




- Does the low indicator LED illuminate on the right rear heated seat switch?

Yes
INSTALL a new heated seat module. REFER to Heated Seat Module - Rear Heated Seat Module - Rear. TEST the system for normal operation.

No
INSTALL a new rear heated seat switch. REFER to Heated Seat Switch - Rear Heated Seat Switch - Rear. TEST the system for normal operation.

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