FRONT POWER SEAT CONTROL SYSTEM(w/ Memory) TERMINALS OF ECU
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CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY
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Disconnect the e18 and e6 position control ECU and switch assembly connectors.
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Measure the voltage and resistance according to the value(s) in the table below.
Tech Tips
Measure the values on the wire harness side with the connector disconnected.
Terminal Connection Wiring Color Terminal Description Condition Specified Condition e18-2 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω e18-7 (+B1) - e18-2 (GND1) W - W-B Battery supply Always 11 to 14 V e6-12 (SYSB) - e18-2 (GND1) P - W-B System power supply Always 11 to 14 V If the result is not as specified, there may be a malfunction on the wire harness side.
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Reconnect the e18 and e6 position control ECU and switch assembly connectors.
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Measure the voltage and resistance according to the value(s) in the table below.
Terminal Connection Wiring Color Terminal Description Condition Specified Condition e18-6 (+B2) - e18-1 (GND2) SB - W-B Lumbar support adjuster power source Always 11 to 14 V e18-1 (GND2) - Body ground W-B - Body ground Lumbar support adjuster ground Always Below 1 Ω e18-3 (SLD+) - e18-2 (GND1) L - W-B Slide motor signal (forward) Slide switch off Below 1 V Slide switch on (Forward) 11 to 14 V e18-4 (SLD-) - e18-2 (GND1) GR - W-B Slide motor signal (rearward) Slide switch off Below 1 V Slide switch on (Rearward) 11 to 14 V e18-5 (FRV-) - e18-2 (GND1) R - W-B Front vertical motor signal (downward) Front vertical switch off Below 1 V Front vertical switch on (Downward) 11 to 14 V e18-8 (FRV+) - e18-2 (GND1) B - W-B Front vertical motor signal (upward) Front vertical switch off Below 1 V Front vertical switch on (Upward) 11 to 14 V e18-9 (RCL+) - e18-2 (GND1) P - W-B Reclining motor signal (forward) Reclining switch off Below 1 V Reclining switch on (Forward) 11 to 14 V e18-11 (RCL-) - e18-2 (GND1) LG - W-B Reclining motor signal (rearward) Reclining switch off Below 1 V Reclining switch on (Rearward) 11 to 14 V e18-10 (LFT+) - e18-2 (GND1) V - W-B Lifter motor signal (upward) Lifter switch off Below 1 V Lifter switch on (Upward) 11 to 14 V e18-12 (LFT-) - e18-2 (GND1) G - W-B Lifter motor signal (downward) Lifter switch off Below 1 V Lifter switch on (Downward) 11 to 14 V e6-1 (SGND) - e18-2 (GND1) BR - W-B Position sensor round Always Below 1 Ω e6-3 (SSFV) - e6-1 (SGND) R - BR Front vertical position signal Front vertical function operating 4.5 to 4.8 V e6-4 (SSRL) - e6-1 (SGND) P - BR Lifter position signal Lifter function operating 4.5 to 4.8 V e6-5 (SSRS) - e6-1 (SGND) G- BR Slide position signal Slide function operating 4.5 to 4.8 V e6-11 (SSRR) - e6-1 (SGND) V - BR Reclining position signal Reclining function operating 4.5 to 4.8 V
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CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
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Remove the main body ECU (multiplex network body ECU).
*A Main Body ECU (Multiplex Network Body ECU) with 1 Connector - - *1 Main Body ECU (Multiplex Network Body ECU) - - *a 1 Connector - - 
*A Main Body ECU (Multiplex Network Body ECU) with 3 Connectors - - *1 Main Body ECU (Multiplex Network Body ECU) - - *a 3 Connectors - - -
Measure the voltage and resistance according to the value(s) in the table below.
Tech Tips
Measure the values on the wire harness side with the connector disconnected.
Terminal Connection Wiring Color Terminal Description Condition Specified Condition A-30 (BECU) - Body ground - Battery power supply Always 11 to 14 V A-32 (IG) - Body ground - IG power supply Ignition switch ON 11 to 14 V A-32 (IG) - Body ground IG power supply Ignition switch off Below 1 V A-29 (ACC) - Body ground ACC power supply Ignition switch ACC 11 to 14 V A-29 (ACC) - Body ground - ACC power supply Ignition switch off Below 1 V A-11 (GND1) - Body ground - Ground Always Below 1 Ω A-2 (FLCY) - Body ground - Front door courtesy light switch LH input Front door LH closed (OFF) → open (ON) 10 kΩ or higher → Below 1 Ω If the result is not as specified, there may be a malfunction in the wire harness.
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