Download Honda Civic 2003 Electrical Diagram Manual L4-1668cc 1.7L SOHC MFI PDF

Discover the Honda Civic 2003 Electrical Diagram Manual for L4-1668cc 1.7L SOHC MFI engines in PDF format. This detailed manual provides complete wiring diagrams, electrical schematics, circuit information, connector locations, component details, and troubleshooting guidance for accurate vehicle electrical repairs and diagnostics. Ideal for mechanics, technicians, and Honda Civic owners, this manual helps identify electrical systems, wiring connections, sensors, switches, relays, and control modules. Get a reliable reference guide to maintain, repair, and understand the electrical layout of your 2003 Honda Civic efficiently.

MODEL COVERED:
Civic 2003, L4-1668cc 1.7L SOHC MFI

MANUAL CONTENTS:
1. Air Conditioning – Automatic A_C Circuit (Hybrid)
2. Air Conditioning – Heater Circuit (Except Hatchback)
3. Air Conditioning – Heater Circuit (Hatchback)
4. Air Conditioning – Manual A_C Circuit (Except Hatchback)
5. Air Conditioning – Manual A_C Circuit (Hatchback)
6. Anti-Lock Brakes – Except Hatchback amp Hybrid
7. Anti-Lock Brakes – Hatchback
8. Anti-Lock Brakes – Hybrid
9. Anti-Theft – Forced Entry Circuit (Except Hatchback amp Hybrid)
10. Anti-Theft – Forced Entry Circuit (Hatchback)
11. Anti-Theft – Forced Entry Circuit (Hybrid)
12. Anti-Theft – Immobilizer Circuit (Except GX amp Hybrid)
13. Anti-Theft – Immobilizer Circuit (GX)
14. Anti-Theft – Immobilizer Circuit (Hybrid)
15. Body Computer – Except Hatchback amp Hybrid
16. Body Computer – Hatchback
17. Body Computer – Hybrid
18. Computer Data Lines – Except Hatchback amp Hybrid
19. Computer Data Lines – Hatchback
20. Computer Data Lines – Hybrid
21. Cooling Fans – Except Hatchback amp Hybrid
22. Cooling Fans – Hatchback
23. Cooling Fans – Hybrid
24. Cruise Control – Except Hatchback amp Hybrid
25. Cruise Control – Hatchback
26. Cruise Control – Hybrid
27. Defogger – Rear Defogger Circuit (Coupe)
28. Defogger – Rear Defogger Circuit (Hatchback)
29. Defogger – Rear Defogger Circuit (Hybrid)
30. Defogger – Rear Defogger Circuit (Sedan)
31. Door Locks – Except Hatchback amp Hybrid
32. Door Locks – Hatchback
33. Door Locks – Hybrid
34. Electronic Power Steering – Hatchback
35. Electronic Power Steering – Hybrid
36. Engine Controls – Except HX amp GX
37. Engine Controls – GX
38. Engine Controls – HX A_T
39. Engine Controls – HX M_T
40. Exterior Lights – Back-up Lamps Circuit (Except Hatchback amp Hybrid)
41. Exterior Lights – Back-up Lamps Circuit (Hatchback)
42. Exterior Lights – Back-up Lamps Circuit (Hybrid)
43. Exterior Lights – Exterior Lamps Circuit (Except Hatchback amp Hybrid)
44. Exterior Lights – Exterior Lamps Circuit (Hatchback)
45. Exterior Lights – Exterior Lamps Circuit (Hybrid)
46. Ground Distribution – Except Hatchback amp Hybrid
47. Ground Distribution – Hatchback
48. Ground Distribution – Hybrid
49. Headlights – Except Hatchback or Hybrid W_ DRL
50. Headlights – Except Hatchback or Hybrid W_O DRL
51. Headlights – Hatchback W_ DRL
52. Headlights – Hatchback W_O DRL
53. Headlights – Hybrid W_ DRL
54. Headlights – Hybrid W_O DRL
55. Horns – Except Hybrid
56. Horns – Hybrid
57. Instrument Cluster – DX, GX
58. Instrument Cluster – EX, HX, LX
59. Instrument Cluster – Hatchback
60. Instrument Cluster – Hybrid
61. Interior Lights – Courtesy Lamps Circuit (Coupe W_ Sunroof)
62. Interior Lights – Courtesy Lamps Circuit (Hatchback)
63. Interior Lights – Courtesy Lamps Circuit (Hybrid)
64. Interior Lights – Courtesy Lamps Circuit (Sedan W_ Sunroof)
65. Interior Lights – Courtesy Lamps Circuit (W_O Sunroof)
66. Interior Lights – Instrument Illumination Circuit (Except Hybrid)
67. Interior Lights – Instrument Illumination Circuit (Hybrid)
68. Mirrors – Heated Mirrors Circuit (Except Hatchback amp Hybrid)
69. Mirrors – Heated Mirrors Circuit (Hatchback)
70. Mirrors – Heated Mirrors Circuit (Hybrid)
71. Mirrors – W_ Defogger Except Hatchback amp Hybrid
72. Mirrors – W_ Defogger Hatchback
73. Mirrors – W_ Defogger Hybrid
74. Mirrors – W_O Defogger Except Hatchback amp Hybrid
75. Mirrors – W_O Defogger Hatchback
76. Mirrors – W_O Defogger Hybrid
77. Power Distribution – Except Hybrid
78. Power Distribution – Hybrid
79. Power Tops – Except Hatchback
80. Power Tops – Hatchback
81. Power Windows – Except Hatchback amp Hybrid
82. Power Windows – Hatchback
83. Power Windows – Hybrid
84. Shift Interlock – Except Hybrid
85. Shift Interlock – Hybrid
86. Sound Systems – Coupe
87. Sound Systems – Hatchback
88. Sound Systems – Hybrid
89. Sound Systems – Sedan
90. Starting_Charging – Charging Circuit (Hatchback)
91. Starting_Charging – Charging Circuit (W_O Hatchback)
92. Starting_Charging – Starting Circuit (Hatchback)
93. Starting_Charging – Starting Circuit (Hybrid)
94. Starting_Charging – Starting Circuit (W_O Hatchback)
95. Supplemental Restraints – Except Hatchback
96. Supplemental Restraints – Hatchback
97. Supplemental Restraints – Hybrid
98. Transmissions – A_T Circuit (Hybrid)
99. Transmissions – A_T Circuit (W_ CVT Except Hybrid)
100. Transmissions – A_T Circuit (W_O CVT)
101. Warning Systems – Except Hatchback amp Hybrid
102. Warning Systems – Hatchback
103. Warning Systems – Hybrid
104. Wiper_Washer – Front Wiper_Washer Circuit (Except Hatchback amp Hybrid)
105. Wiper_Washer – Front Wiper_Washer Circuit (Hatchback)
106. Wiper_Washer – Front Wiper_Washer Circuit (Hybrid)
107. A_T Gear Position Indicator Circuit Diagram
108. A_T Gear Position Indicator_001
109. A_T Gear Position Indicator_002
110. A_T Gear Position Indicator_003
111. Brake Warning Indicator
112. CarLink
113. Cellular Phone
114. Circuit 11 Illumination (Positive)
115. Circuit 12 Illumination (Negative)
116. Circuit 13 Brake Pedal Position
117. Circuit 196 Key-In Ignition
118. Circuit 20 Taillight Relay Control
119. Circuit 200 Trunk Lid Position
120. Circuit 201 Front Passengers Door Switch
121. Circuit 202 Drivers Door Switch
122. Circuit 203 Rear Door Switch (Sedan)
123. Circuit 207 (Canada) Parking Brake Position
124. Circuit 207 (USA) Parking Brake Position
125. Circuit 21 Headlight Relay 1, 2
126. Circuit 61 Horn Relay Control
127. Circuit D04 Power Source For ECM_PCM Control
128. Circuit D47 Reference Voltage For PCM Sensors
129. Circuit D54 Reference Voltage For PCM Sensors
130. Circuit Diagram
131. Circuit Diagrams_001
132. Circuit Diagrams_002
133. Circuit Diagrams_004
134. Circuit Diagrams_005
135. Circuit Diagrams_006
136. Circuit Diagrams_007
137. Circuit Diagrams_008
138. Circuit Diagrams_009
139. Circuit Diagrams_010
140. Circuit Diagrams_011
141. Circuit Diagrams_012
142. Circuit Diagrams_013
143. Circuit Diagrams_014
144. Circuit Diagrams_015
145. Circuit Diagrams_016
146. Circuit Diagrams_017
147. Circuit Diagrams_018
148. Circuit Diagrams_019
149. Circuit Diagrams_020
150. Circuit Diagrams_021
151. Circuit Diagrams_022
152. Circuit Diagrams_023
153. Circuit Diagrams_024
154. Circuit E93 Vehicle Speed Sensor Signal
155. Circuit F20 Sensor Ground For ECM_PCM Sensors
156. Circuit F28 Service Check Control
157. Circuit F29 DLC Input_Output
158. Circuit F55 DLC Input_Output
159. Circuit M06 (A_T) Back-Up Lights
160. Circuit M06 (M_T) Back-Up Lights
161. Circuit M34 A_T Reverse Position
162. Circuit M35 A_T Park Position
163. Circuit M36 (A_T, CVT_) A_T Park_Neutral Position
164. Circuit M36 (CarLink) A_T Park_Neutral Position
165. Circuit M37 (Coupe_ LX, EX) Neutral Position
166. Circuit M37 (USA_ HX Sedan_ LX, EX, GX) Neutral Position
167. Circuit Z20 Logic Ground
168. Circuit Z28 Ground For ECM_PCM Sensors
169. Console
170. Courtesy Lamp
171. Daytime Running Lamp
172. Diagram 10-0
173. Diagram 10-10
174. Diagram 10-11
175. Diagram 10-1a
176. Diagram 10-1b
177. Diagram 10-2
178. Diagram 10-3
179. Diagram 10-4
180. Diagram 10-5a
181. Diagram 10-5b
182. Diagram 10-6
183. Diagram 10-7
184. Diagram 10-8a
185. Diagram 10-8b
186. Diagram 10-9a
187. Diagram 10-9b
188. Diagram 23-0
189. Diagram 23-1
190. Diagram 23-2
191. Diagram 23-3
192. Diagram 23-4
193. Diagram 23-5
194. Diagram 23-6
195. Diagram 23-7
196. Diagram 23-8
197. Diagram 23-9
198. Diagram 24-0
199. Diagram 24-1
200. Diagram 24-2
201. Diagram 24-3
202. Diagram 24-4
203. Diagram 24-5
204. Diagram 24-6
205. Diagram 24-7
206. Diagram 24-8
207. Diagram 24-9
208. Diagram 26-0
209. Diagram 26-1
210. Diagram 26-10
211. Diagram 26-2
212. Diagram 26-3
213. Diagram 26-4
214. Diagram 26-5
215. Diagram 26-6
216. Diagram 26-7
217. Diagram 26-8
218. Diagram 26-9
219. Diagram Set 10 (Power Distribution)
220. Diagram Set 110 (Exterior Lights)
221. Diagram Set 114 (Interior Lights)
222. Diagram Set 115 (Entry Light Control System)
223. Diagram Set 120 (Power Windows)
224. Diagram Set 122 (Moonroof)
225. Diagram Set 130 (Keyless_Power Door Locks)
226. Diagram Set 132 (Immobilizer System)
227. Diagram Set 133 (Security Alarm System (Honda Accessory))
228. Diagram Set 138 (Interlock System)
229. Diagram Set 14 (Ground Distribution)
230. Diagram Set 141 (Power Mirrors)
231. Diagram Set 15 (Splice and Junction Connector Details)
232. Diagram Set 150 (Audio System)
233. Diagram Set 152 (Cellular Phone System)
234. Diagram Set 155 (Accessory Power Sockets)
235. Diagram Set 20 (Ignition System)
236. Diagram Set 21 (Starting System)
237. Diagram Set 22 (Charging System)
238. Diagram Set 23 (Fuel and Emissions (DX, LX))
239. Diagram Set 24 (Fuel and Emissions (EX))
240. Diagram Set 26 (Fuel and Emissions (HX))
241. Diagram Set 31 (VTEC Control System (EX, HX))
242. Diagram Set 34 (Cruise Control)
243. Diagram Set 39 (A_T Controls)
244. Diagram Set 40 (Horn)
245. Diagram Set 44 (ABS (Anti-Lock Brake System))
246. Diagram Set 47 (SRS (Supplemental Restraint System))
247. Diagram Set 50 (Multiplex Control System)
248. Diagram Set 52 (CarLink)
249. Diagram Set 60 (HVAC)
250. Diagram Set 63 (Fans)
251. Diagram Set 64 (Rear Window Defogger)
252. Diagram Set 73 (Lights-on, Key-In and Seat Belt Reminders, Key Light Timer and Low Oil Pressure Indicator)
253. Diagram Set 80 (Gauges and Indicators)
254. Diagram Set 89 (A_T Gear Position Indicator)
255. Diagram Set 91 (Wiper_Washer)
256. Dome Lamp
257. ECM_PCM Circuit Diagrams
258. ECM_PCM Electrical Connections
259. Fog_Driving Lamp
260. Fuel and Emissions (DX, LX)
261. Fuel and Emissions (EX)
262. Fuel and Emissions (HX)
263. Ground-to-Components Index
264. Headlights (Canada)
265. Headlights (DRL – Canada)
266. Headlights (USA)
267. Instrument Cluster _ Carrier
268. License Plate Lamp
269. Map Light
270. Marker Lamp
271. Parking Lamp
272. PCM A_T Control System
273. Radiator Cooling Fan Motor
274. Tail Lamp
275. Transmission Range Switch
276. Trunk Lamp
277. Vanity Lamp
278. Variable Valve Timing Actuator
279. Wiring Diagram
280. Wiring Diagram Index
281. Wiring Diagrams_001
282. Wiring Diagrams_002
283. Wiring Diagrams_003
284. Wiring Diagrams_004
285. Wiring Diagrams_005
286. Wiring Diagrams_006
287. Wiring Diagrams_007
288. Wiring Diagrams_008
289. Wiring Diagrams_009
290. Wiring Diagrams_010
291. Wiring Diagrams_011
292. Wiring Diagrams_012
293. Wiring Diagrams_013
294. Wiring Diagrams_014
295. Wiring Diagrams_015
296. Wiring Diagrams_016
297. Wiring Diagrams_017
298. Wiring Diagrams_018
299. Wiring Diagrams_019
300. Wiring Diagrams_020
301. Wiring Diagrams_021
302. Wiring Diagrams_022
303. Wiring Diagrams_023
304. Wiring Diagrams_024
305. Wiring Diagrams_025
306. Wiring Diagrams_026
307. Wiring Diagrams_027
308. Wiring Diagrams_028
309. Wiring Diagrams_029
310. Wiring Diagrams_030
311. Wiring Diagrams_031

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