Test No. 61: Both Power Mirrors Do Not Operate

NOTE: Test applies only to models with memory power mirrors.

Check power mirror switch. See POWER MIRROR SWITCH under COMPONENT TESTS. If power mirror switch is okay, go to next step. If power mirror switch is defective, replace switch and recheck power mirror operation.
Check wiring harness and electrical connectors between power mirror switch and power seat Electronic Control Unit (ECU). See WIRING DIAGRAMS in POWER MIRRORS article. Power seat ECU is located below the driver's seat. If wiring harness and electrical connectors are okay, go to next step. If wiring harness or electrical connectors are defective, repair as necessary and recheck power mirror operation.
Check body Electronic Control Unit (ECU) for proper voltage and input signals. See BODY ELECTRONIC CONTROL UNIT under PIN VOLTAGE TESTS. Body ECU is located at driver's side of instrument panel on the fuse/relay box. See Figure. If proper voltage and input signals exist, go to next step. If proper voltage or input signal does not exist, repair as necessary and recheck power mirror operation.

NOTE: It may be necessary to for proper voltage and input signals at appropriate door ECU for the malfunctioning power mirror before replacing body ECU. See DRIVER'S DOOR ELECTRONIC CONTROL UNIT and PASSENGER'S DOOR ELECTRONIC CONTROL UNIT under PIN VOLTAGE TESTS.

Replace body ECU with a known-good body ECU and recheck power mirror operation. If power mirror operates properly, original body ECU was defective. If power mirror still does not operate properly, check wiring harness and electrical connectors for body ECU and power mirror system for an intermittent problem. See WIRING DIAGRAMS in POWER MIRRORS article. Repair wiring harness or electrical connector as necessary.