Pinpoint Test AA: The Heated Seat Is Inoperative - Right Rear Seat Does Heat But The Heated Seat Indicator Does Not Illuminate
Seats
Pinpoint Tests
Pinpoint Test AA: The Heated Seat is Inoperative - 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 hi or low mode will command ON the left rear heated seat. Voltage is then supplied to the left rear heated seat switch from the heated seat module on either circuit CHS52 (BU) (hi 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 module
- Heated seat switch
PINPOINT TEST AA: THE HEATED SEAT IS INOPERATIVE - RIGHT REAR SEAT DOES HEAT BUT THE HEATED SEAT INDICATOR DOES NOT ILLUMINATE WHEN PRESSED
WARNING: Never install heated seat parts not intended for use on this vehicle. Parts released for other model years or vehicle lines are not compatible even if they appear visually and physically similar. Installing incorrect parts will result in heated seat system performance outside design specification. Failure to follow this instruction may result in serious personal injury.
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AA1 CHECK CIRCUITS CHS53 (WH/BN) AND CHS52 (BU) FOR A SHORT TO GROUND
- Disconnect: Right Rear Heated Seat Switch C822.
- Disconnect: Heated Seat Module C3162.
- Measure the resistance between:
- heated seat module C3162-3, circuit CHS53 (WH/BN), harness side and ground.
- heated seat module C3162-6, circuit CHS52 (BU), harness side and ground.
- Are the resistances greater than 10,000 ohms?
Yes
GO to AA2.
No
REPAIR the affected circuit. TEST the system for normal operation.
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AA2 CHECK CIRCUITS CHS53 (WH/BN) AND CHS52 (BU) FOR AN OPEN
- Measure the resistance between:
- right rear heated seat switch C822-3, circuit CHS53 (WH/BN), harness side and heated seat module C3162-3, circuit CHS53 (WH/BN), harness side.
- right rear heated seat switch C822-4, 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 AA3.
No
REPAIR the affected circuit. TEST the system for normal operation.
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AA3 CHECK THE HEATED SEAT HI INDICATOR
- Connect: Right Rear Heated Seat Switch C822.
- Ignition ON.
- Connect a fused jumper lead between heated seat module C3162-6, circuit CHS52 (BU), harness side and C3162-1, circuit SBB07 (WH/RD), harness side.
- Does the hi indicator LED illuminate on the right rear heated seat switch?
Yes
GO to AA4.
No
INSTALL a new rear heated seat switch. REFER to Heated Seat Switch - Rear Seat Heated Seat Switch - Rear Seat. TEST the system for normal operation.
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AA4 CHECK THE HEATED SEAT LOW INDICATOR
- Connect a fused jumper lead between heated seat module C3162-3, circuit CHS53 (WH/BN), harness side and C3162-17, circuit SBB07 (WH/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 Seat Heated Seat Module - Rear Seat. TEST the system for normal operation.
No
INSTALL a new rear heated seat switch. REFER to Heated Seat Switch - Rear Seat Heated Seat Switch - Rear Seat. TEST the system for normal operation.
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