SYSTEM TESTS
| CAUTION | When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES in GENERAL INFORMATION before disconnecting battery. |
POWER MIRROR SYSTEM
Note. For diagnosing heated power mirrors, see REAR WINDOW & MIRROR DEFOGGERS - CHEROKEE article.
- Turn ignition switch to OFF position. Remove and inspect fuse No. 18 (10-amp) in junction block. Junction block is located behind right kick panel. If fuse is blown, repair short to ground in Yellow/Dark Green wire between junction block and Driver's Door Module (DDM). Replace fuse. If fuse is okay, go to next step.
- Turn ignition switch to ON position. Check voltage at fuse No. 18. If no battery voltage exists, repair open in Black/White wire between ignition switch and junction block. If battery voltage exists, go to next step.
- If problem being diagnosed is inoperative illumination of power mirror switch buttons on DDM, go to next step. If problem being diagnosed is inoperative power mirror, go to step 5.
- Turn ignition switch to OFF position. Remove and inspect power window circuit breaker No. 28 (25-amp) in junction block. If circuit breaker is not okay, replace power window circuit breaker. If circuit breaker is okay, go to next step.
- Turn ignition switch to OFF position. Disconnect negative battery cable. Remove driver's door trim panel. See «FRONT DOOR TRIM PANEL»(ref-91460-S03796355762001031600000) under REMOVAL & INSTALLATION. Disconnect DDM harness connector. Connect negative battery cable. Turn ignition switch to ON position. Check voltage at terminal No. 3 (Yellow/Dark Green wire) at DDM harness connector C2. (Scheme 4) If no battery voltage exists, repair open in Yellow/Dark Green wire between DDM and junction block. If battery voltage exists, replace DDM. See «DRIVER'S DOOR MODULE»(ref-91460-S19424860782001031600000) under REMOVAL & INSTALLATION.
- On models with power windows, go to next step. Turn ignition switch to OFF position. Disconnect negative battery cable. Remove power mirror switch. See «STAND-ALONE POWER MIRROR SWITCH»(ref-91460-S06738602902001031600000) under REMOVAL & INSTALLATION. Disconnect power mirror switch harness connector. Connect negative battery cable. Turn ignition switch to ON position. Check voltage at terminal No. 9 (Tan wire) at power mirror switch harness connector. If no battery voltage exists, repair open in Tan wire power mirror switch and junction block. If battery voltage exists, go to step 8.
- On models with power windows, remove door trim panel See «FRONT DOOR TRIM PANEL»(ref-91460-S03796355762001031600000) under REMOVAL & INSTALLATION. Disconnect DDM harness connector. Connect negative battery cable. Turn ignition switch to ON position. Check voltage at terminal No. 3 (Yellow/Dark Green wire) at DDM harness connector C2. If no battery voltage exists, repair open in Yellow/Dark Green wire between DDM and junction block. If battery voltage exists, go to next step.
- On all models, turn ignition switch to OFF position. Disconnect negative battery cable. Check continuity between ground and terminal No. 1 (Black wire) at power window switch harness connector (stand-alone models) or terminal No. 5 (Black wire) at DDM harness connector C2 (power window-equipped models). If no continuity exists, repair short to ground in Black wire between DDM and ground point. Ground point is located in left quarter panel, near tail light. If continuity exists, go to next step.
- Test stand-alone power mirror switch or DDM power mirror switch. See «POWER MIRROR SWITCH»(ref-91460-S15538780672001031600000) under COMPONENT TESTS. Replace power mirror switch or DDM as necessary. If power mirror switch is okay, go to next step.
- Test power mirror motor. See «POWER MIRROR MOTOR»(ref-91460-S23402118192001031600000) test under COMPONENT TESTS. Replace mirror as necessary.
POWER MIRROR MOTOR
Remove door trim panel. See FRONT DOOR TRIM PANEL under REMOVAL & INSTALLATION. Disconnect power mirror harness connector. Connect 2 jumper wires between specified terminals at power mirror harness connector, and note power mirror motor reaction. See POWER MIRROR MOTOR TEST table. (Scheme 3) If power mirror does not react as specified, replace power mirror. See POWER MIRROR ASSEMBLY under REMOVAL & INSTALLATION.
| Connect 12 Volts To Terminal No. | Connect Ground To Terminal No. | Mirror Reaction |
|---|---|---|
| 1 | 4 | Up |
| 4 | 1 | Down |
| 2 | 3 | Left |
| 3 | 2 | Right |
POWER MIRROR MOTOR TEST
Scheme 3
Driver's Door Module (DDM) Switch
Remove Driver's Door Module (DDM). See DRIVER'S DOOR MODULE under REMOVAL & INSTALLATION. Place mirror select switch in left or right mirror mode. Continuity should exist between specified DDM connector C2 terminals when each control button is depressed. See DDM POWER MIRROR SWITCH CONTINUITY TEST table. (Scheme 4) If continuity is not as specified, replace DDM.
| Switch Position | Terminals No. | |
|---|---|---|
| Left Mirror | ||
| Up | 1 & 3; 2 & 5 | |
| Down | 2 & 3; 1 & 5 | |
| Right | 3 & 6; 2 & 5 | |
| Left | 2 & 3; 5 & 6 | |
| Right Mirror | ||
| Up | 3 & 7; 2 & 5 | |
| Down | 2 & 3; 5 & 7 | |
| Right | 3 & 4; 2 & 5 | |
| Left | 2 & 3; 4 & 5 | |
DDM POWER MIRROR SWITCH CONTINUITY TEST
Scheme 4
Stand-Alone Switch
Disconnect negative battery cable. Remove power window switch. See STAND-ALONE POWER MIRROR SWITCH under REMOVAL & INSTALLATION. Place mirror select switch in left or right mirror mode. Continuity should exist between specified terminals when each control button is depressed. See STAND-ALONE POWER MIRROR SWITCH CONTINUITY table. (Scheme 5) If continuity is not as specified, replace stand-alone power mirror switch.
| Switch Position | Terminals No. | |
|---|---|---|
| Left Mirror | ||
| Off | 1 & 5; 1 & 6; 1 & 7; 1 & 8 | |
| Up | 2 & 8; 1 & 5; 1 & 6; 1 & 7 | |
| Down | 2 & 5; 1 & 6; 1 & 7; 1 & 8 | |
| Left | 2 & 7; 1 & 5; 1 & 6; 1 & 8 | |
| Right | 2 & 6; 1 & 5; 1 & 7; 1 & 8 | |
| Right Mirror | ||
| Off | 1 & 3; 1 & 4; 1 & 5; 1 & 6 | |
| Up | 2 & 4; 1 & 3; 1 & 5; 1 & 6 | |
| Down | 2 & 5; 1 & 3; 1 & 4; 1 & 6 | |
| Left | 2 & 3; 1 & 4; 1 & 5; 1 & 6 | |
| Right | 2 & 6; 1 & 3; 1 & 4; 1 & 5 | |
STAND-ALONE POWER MIRROR SWITCH CONTINUITY
Scheme 5
FRONT DOOR TRIM PANEL
Note. When removing door trim panel, start at bottom of panel. Pry panel free with wide, flat prying tool.