Trouble Shooting

Trouble shooting of a power mirror system complaint begins with verification of the customer problem. If problem occurs, go to step 3. If problem does not occur, go to next step.
If problem does not occur, review conditions under which problem occurred for customer and try to duplicate those conditions. For example, if the problem occurs on rainy days or during high humidity conditions, sprinkle water onto vehicle and see if malfunction occurs. DO NOT sprinkle water directly into engine compartment or onto electronic components. Visually inspect for signs of mechanical and electrical damage. Inspect for blown fuses and damaged relays. Inspect for loose or corroded connections, damaged wiring harnesses and/or switches. Check for a broken or partially broken wire inside insulation, which could cause system malfunction but prove good in a continuity/voltage check with system disconnected. Ensure any aftermarket electronic equipment is properly installed. If fault is found, repair as necessary.
Inspect the multiplex communication system and confirm that there is no trouble by the basic inspection and DTC check. See PRE-CHECK under SELF-DIAGNOSTIC in MULTIPLEX COMMUNICATION SYSTEM article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.

Determine problem symptom. See PROBLEM SYMPTOM INDEX table.

PROBLEM SYMPTOM INDEX

Symptom

Suspected Area ⁽¹⁾

Electro Chromic Mirror System

Electro Chromic Inner Mirror Does Not Operate

⁽²⁾⁽³⁾⁽⁴⁾

Electro Chromic Outer Mirror Does Not Operate

⁽²⁾⁽⁵⁾⁽³⁾⁽⁴⁾

Power Mirrors W/ Driving Position Memory System

Both Right & Left Mirrors Do Not Operate

⁽⁶⁾⁽⁴⁾⁽⁷⁾

Only One Side Of Mirror Does Not Operate

⁽⁸⁾⁽⁴⁾⁽⁹⁾

Mirror Does Not Return To Memorized Position

⁽¹⁰⁾⁽⁴⁾⁽¹¹⁾

Memorized Position Is Moved

⁽¹⁰⁾⁽⁴⁾

Power Mirrors W/O Driving Position Memory System

Mirror Does Not Operate

⁽⁶⁾⁽⁴⁾⁽⁷⁾⁽⁹⁾

Mirror Operates Abnormally

⁽⁶⁾⁽¹²⁾⁽⁴⁾⁽⁷⁾⁽⁹⁾

⁽¹⁾	Perform test procedures in order listed under suspected area.

⁽²⁾	Check the ECU-IG fuse (15-amp). See COMPONENT LOCATIONS .

⁽³⁾	Check the electro chromic inner mirror. See ELECTRO CHROMIC INNER MIRROR under COMPONENT TESTS.

⁽⁴⁾	Check the wire harness. See WIRING DIAGRAMS .

⁽⁵⁾	Check the electro chromic outer mirror. See ELECTRO CHROMIC OUTER MIRROR under COMPONENT TESTS.

⁽⁶⁾	Check the mirror switch. See MIRROR SWITCH under COMPONENT TESTS.

⁽⁷⁾	Check the body ECU No. 2. See BODY CONTROL SYSTEMS article.

⁽⁸⁾	Check the mirror motor. See MIRROR MOTOR (W/ DRIVING POSITION MEMORY) under COMPONENT TESTS.

⁽⁹⁾	Check the driver and passenger door ECUs located in the door panels. See PIN VOLTAGE TESTS .

⁽¹⁰⁾	Check the mirror position sensor (position is not set). See MIRROR POSITION SENSOR under COMPONENT TESTS.

⁽¹¹⁾	Check the power seat control ECU. See POWER & HEATED SEATS article.

⁽¹²⁾	Check the mirror motor. See POWER MIRROR MOTOR (W/O DRIVING POSITION MEMORY) under COMPONENT TESTS.

Inspect the circuits of the power mirrors system. See CIRCUIT TESTS .
After repairs have been completed, confirm that problem has been eliminated. Operate the system under same conditions recorded for original complaint. If problem is no longer present, repair has corrected problem. If problem is still present, further diagnosis and repair is required.