Pinpoint Test C: 2-Way Lumbar Deflate Tests
- C1: 2-WAY LUMBAR DEFLATE TEST 1 NOTE: The battery support unit must be connected during this test to ensure that the power supply is stable.NOTE:
- Circuit reference - VBATT -
- The 2-way lumbar deflate circuit current specification is 0.50A ± 10%.
- Connect an inductive ammeter to the seat switchpack power circuit
- Set the ignition to on
- Operate the seat switchpack lumbar deflate switch
Is the measured current less than specification?
Yes: GO to C2.
No: Check the lumbar air cell hoses for blockages
- C2: 2-WAY LUMBAR DEFLATE TEST 2 NOTE: Do not disconnect the electrical connector during this step; the seat switchpack is removed for access to the wiring harness only.
- Refer to the relevant article of the repair information and remove the seat switchpack
- Set a multimeter to measure voltage
- Using the multimeter, measure and record the battery voltage (reference voltage)NOTE: Circuit reference - LUMBAR DEFLATE/GND -
- Connect the multimeter across the seat switchpack lumbar deflate terminal and the ground terminal
- Set the ignition to on
- Operate the seat switchpack lumbar deflate switch
Is the measured voltage less than battery voltage?
Yes: GO to PINPOINT TEST A .
No: Refer to the electrical circuit diagrams and check the lumbar deflate solenoid circuit for short circuit to ground, short circuit to power, open circuit, high resistance