For 1990-2009 cars

### Connector C1 - 32 Pin Connector (Red)

Connector C1 32 Pin Connector (Red) | (1) Open Circuit (2) Grounded Circuit (3) Open/Grounded Circuit (4) Shorted to Voltage (*) Refer to Electrical Diagnosis
--- | ---
Pin | Wire Color | Circuit No. | Function | Component Connector Cavity | DTC(s) Affected | Possible Symptoms From a Faulty Circuit
1 | Yel | 573 | Crankshaft Position Sensor Signal | CKP C | P0335, P0336 | Misfire diagnostic inoperative
2 | Blk/Wht | 451 | PCM Ground | Engine Ground * |  | Engine cranks but will not start.
3 | Blk | 1744 | Injector #1 Control | Injector #1 A | P0200 (3) P1222 | Rough idle, Engine miss
4 | Lt Blu/Blk | 844 | Injector #4 Control | Injector #4 A | P0200 (3) P1222 | Rough idle, Engine miss
5 | Yel/Blk | 846 | Injector #6 Control | Injector #6 A | P0200 (3) P1222 | Rough idle, Engine miss
6 | Red/Blk | 877 | Injector #7 Control | Injector #7 A | P0200 (3) P1222 | Rough idle, Engine miss
7 | Dk Grn/Wht | 465 | FP Relay Control | FP Relay 85 |  | Long Crank Time Before Engine Starts
8 |  |  |  |  |  | Not Used
9 | Gry | 435 | EGR Vacuum Control signal solenoid valve | EGR Solenoid B | P0400 P0403 (3) | Detonation, Stall, Rough Idle, And Poor Performance
10 | Dk Blu | 473 | Secondary Cooling fan relay control | Fan Relay 86 | P1642 (3) | Inoperative Cooling Fan or Fan ON At All Times
11 | Dk Grn | 335 | Primary cooling Fan relay Control. (not used with VO8 option) | Fan Relay 86 | P1641 (3) | Inoperative Cooling Fan or Fan ON At All Times
12 |  |  |  |  |  | Not Used
13 | Wht | 121 | Engine Speed Output Signal | * | P1643 (3) | Tach inoperative
14 | Brn | 436 | AIR Pump Relay Control | AIR Pump Relay C1 | P0412 (3) | AIR Pump Inoperative or ON At All Times.
15-17 |  |  |  |  |  | Not Used
18 | Blk/Wht | 451 | PCM Ground | Engine Ground * |  | Engine cranks but will not start.
19 | Lt Grn/Blk | 1745 | Injector #2 Control | Injector #2 A | P0200 (3) P1222 | Rough idle, Engine miss
20 | Blk/Wht | 845 | Injector #5 Control | Injector #5 A | P0200 (3) P1222 | Rough idle, Engine miss
21 | Pnk/Blk | 1746 | Injector #3 Control | Injector #3 A | P0200 (3) P1222 | Rough idle, Engine miss
22 | Dk Blu/Wht | 878 | Injector #8 Control | Injector #8 A | P0200 (3) P1222 | Rough idle, Engine miss
23 | Orn/Blk | 463 | Traction Control System Spark Retard Request | C3-B |  | Poor Performance EBTCM DTC 74
24 |  |  |  |  |  | Not Used
25 | Blu | 229 | Fuel Enable Signal | * | P1626 | Engine Cranks But Will Not Start
26-30 |  |  |  |  |  | Not Used
31 | Ppl | 401 | VSS Signal Low | VSS A | P0500 P0502 P0503 P1652 (1) | Inoperative Speedometer, Inoperative Cruise Control, Radio Volume will not increase with vehicle Speed. Transmission Restricted to second Gear.
32 | Yel | 400 | VSS Signal High | VSS B | P0500 P0502 P0503 P1652 (1) | Inoperative Speedometer, Inoperative Cruise Control, Radio Volume will not increase with vehicle Speed. Transmission Restricted to second Gear.

### Connector C2 - 32 Pin Connector (Black)

PCM Connector C2 (Black) | (1) Open Circuit (2) Grounded Circuit (3) Open/Grounded Circuit (4) Shorted To Voltage * Refer To Electrical Diagnosis
--- | ---
Pin | Wire Color | Circuit No. | Function | Component Connector Cavity | DTC(s) Affected | Possible Symptoms From a Faulty Circuit
1 | Dk Blue | 214 | A/C Request Signal | A/C Pressure cycling switch B |  | A/C Inoperative (1) A/C ON at all times
2 | Red/Blk | 453 | Low Resolution Signal | Test Connector A Distributor A | P1371 (3) | Engine Cranks But Will Not Start
3 | Pnk/Blk | 632 | Distributor Reference Low Signal | Test Connector D Distributor D |  | Engine Cranks But Will Not Start (1)
4 |  |  |  |  |  | Not Used
5 | Wht | 423 | Ignition Control | Ignition Coil Module "B" | P1351 (1,4) P1361 (2) | Engine Cranks But Will Not Start
6 | Blk | 452 | Sensor Ground | IAT A, TP sensor B Trans M, | P0118 (1) P0122 (1) P1118 (1) P0713 (1) | Lack of Power, Rough Idle, High Idle and TCC May Not Apply Properly
7 | Lt Grn | 1222 | Transmission 1-2 Shift Solenoid control | Trans A | P0753 (3,4) | Second and Third Gear, or Forth Gear Only
8 | Dk Grn/Wht | 817 | VSS Output | Cruise module and I/P | P1652 (3,4) | Speedometer Inoperative Cruise Inoperative
9-10 |  |  |  |  |  | Not Used
11 | Brn/Wht | 1173 | Low Oil Lamp Control | * | P1653 | Low Oil Lamp ON at all times or OFF at all times
12 | Yel/Blk | 1223 | Transmission 2-3 Shift Solenoid control | Trans B | P0758 (3,4) | Second or Third Gear Only, No TCC Apply
13 | Brn | 687 | Transmission 3-2 Shift Solenoid control | Transmission S | P0785 (3,4) | Harsh 3-2 Downshift, Third Gear Only
14 | Red | 631 | Distributor Ignition Feed | Test Connector C Distributor C |  | Engine Cranks But Will Not Start
15 | Orn | 440 | PCM Battery Positive Voltage | * | * | Engine Cranks But Will Not Start (3)
16 | Ppl | 455 | Sensor Ground | MAP A ECT A | P0113 (1) P0108 (1) P0530 (1) | Poor Performance, A/C Inoperative
17-18 |  |  |  |  |  | Not Used
19 | Yel | 492 | MAF Sensor Signal | MAF A | P0100 P0101 P0102 (2) P0103 | Engine Stall, Hesitation When Malfunction Occurs
20 | Ppl/Wht | 430 | High Resolution Signal | Test Connector B Distributor B | P1372 (3,4) | Engine Surge, Lack of Power
21 | Dk Grn | 59 | A/C Clutch Status | A/C clutch relay C7 A/C clutch B | P1539 (4) P1546 (1) | A/C Inoperative
22 | Tan/Wht | 585 | TCC Fluid Temperature Switch Signal (5.7 Only) | TCC fluid temperature sensor |  | Modified transmission shift patterns
23 | Ppl | 1986 | EVAP Vacuum Switch | EVAP Vacuum Switch B | P0441 P1441 |
24-25 |  |  |  |  |  | Not Used
26 | Orn/Blk | 495 | PSP Switch signal | PSP A |  | Stalling, unstable idle
27 | Brn | 1174 | Engine oil level sensor signal | Oil level sensor B |  | Incorrect low oil lamp operation.
28 | Gry | 416 | 5 Volt reference | TP sensor A A/C refrigerant pressure sensor B | P0123 (3) | High Idle, Lack of Performance
29 | Gry | 474 | 5 Volt reference | MAP sensor C | P0107 (3) P0530 (3) | A/C Inoperative
30 | Pnk | 539 | PCM Ignition Positive Voltage |  |  | Engine Cranks But Will Not Start
31 | Orn | 440 | PCM Battery Positive Voltage |  |  |
32 |  |  |  |  |  | Not Used

### Connector C3 - 32 Pin Connector (Clear or Gray)

PCM Connector C3 (Clear or Gray) | (1) Open Circuit (2) Grounded Circuit (3) Open/Grounded Circuit (4) Shorted to Voltage (*) Refer to Electrical Diagnosis
--- | ---
Pin | Wire Color | Circuit No. | Function | Component Connector Cavity | DTC(s) Affected | Possible Symptoms From a Faulty Circuit
1 | Lt Blu/Wht | 1747 | IAC Coil A High | IAC D | P0506 P0507 P1508 P1509 | Incorrect Idle, Surge, Stall
2 | Lt Blu/Blk | 1748 | IAC Coil A Low | IAC C | P0506 P0507 P1508 P1509 | Incorrect Idle, Surge, Stall
3 | Tan | 1671 | Bank 2 (Right Rear) HO2S #2 Low | HO2S A |  |
4 | Ppl | 1670 | Bank 2 (Right Rear) HO2S #2 High | HO2S B |  |
5 | Lt Grn/Blk | 444 | IAC Coil B Low | IAC A | P0506 P0507 P1508 P1509 | Incorrect Idle, Surge, Stall
6 | Lt Grn/Wht | 1749 | IAC Coil B High | IAC B | P0506 P0507 P1508 P1509 | Incorrect Idle, Surge, Stall
7 | Tan | 1667 | Bank 2 (Right Front) HO2S #2 Low | HO2S A | P0154 (1) | Rough Idle, Lean Exhaust, Poor Performance and Poor Fuel Economy
8 | Ppl | 1666 | Bank 2 (Right Front) HO2S #2 High | HO2S B | P0151 (2) P0152 (4) | Rough Idle, Lean Exhaust, Poor Performance and Poor Fuel Economy
9-13 |  |  |  |  |  | Not Used
14 | Ppl | 420 | Brake Switch Signal | Brake Switch A | P0703 (3,4) | No TCC
15 | Orn/Blk | 434 | PNP Switch | PNP Switch B |  | Poor Fuel Economy, Stall, Incorrect Idle
16 | Red/Blk | 1228 | Transmission Pressure Control Solenoid | Transmission C | P0748 (3) | Harsh Transmission Shift
17 | Tan/Wht | 1669 | Bank 1 (Left Rear) HO2S #2 Low | HO2S A | P0140 (1) |
18 | Ppl/Wht | 1668 | Bank 1 (Left Rear) HO2S #2 High | HO2S B | P0137 P0138 P0140 |
19 | Tan/Wht | 1653 | Bank 1 (Left Front) HO2S #1 Low | HO2S A | P0134 (1) | Rough Idle, Lean Exhaust, Poor Performance and Poor Fuel Economy
20 | Ppl/Wht | 1665 | Bank 1 (Left Front) HO2S #1 High | HO2S B | P0131 (2) P0132 (4) P0134 (1) | Rough Idle, Lean Exhaust, Poor Performance and Poor Fuel Economy
21 | Tan | 472 | IAT Sensor Signal | IAT B | P0112 (2) P0113 (1) P1111 (2) P1112 (1) | Poor Fuel Economy
22 | Dk Blu | 417 | TP Sensor Signal | TP Sensor C | P0121 P0122 (4) P0123 (3) P1121 (3) P1122 (4) | High Idle, Lack of Power, Harsh Transmission Shifts
23 | Lt Grn | 432 | MAP Sensor Signal | MAP B | P0106 P0107 (3) P0108 (4) P1107 (3) | Modified Shift Patterns
24 |  |  |  |  |  | Not Used
25 | Yel | 410 | ECT Sensor Signal | ECT B | P0117 (2) P0118 (1) P0125 P1114 (2) P1115 (1) | Exhaust Odor, Rough Idle, Poor Fuel Economy, TCC Apply Cold
26-27 |  |  |  |  |  | Not Used
28 | Pnk | 1224 | Transmission Range Signal A | Transmission N | P1810 (3) | No TCC, Harsh Shift
29 | Dk Blu | 1225 | Transmission Range Signal B | Transmission R | P1810 (3) | No TCC, Harsh Shift
30 | Red | 1226 | Transmission Range C | Transmission P | P1810 (3) | No TCC, Harsh Shift
31 |  |  |  |  |  | Not Used
32 | Blk/Whit | 451 | PCM Ground | Engine Block |  | Engine Cranks But Will Not Start

### Connector C4 - 32 Pin Connector (Blue)

PCM Connector C4 (Blue) | (1) Open Circuit (2) Grounded Circuit (3) Open/Grounded Circuit (4) Shorted to Voltage (*) Refer to Electrical Diagnosis
--- | ---
Pin | Wire Color | Circuit No. | Function | Component Connector Cavity | DTC(s) Affected | Possible Symptoms From a Faulty Circuit
1 | Blk/Wht | 451 | PCM Ground | Engine Block |  | Engine Cranks But Will Not Start
2 | Lt Blu/Wht | 1229 | Transmission Pressure Control Solenoid Low | Transmission D | P0748 (3) | Harsh Transmission Shifts
3 | Pnk | 539 | PCM Ignition Positive Voltage | * |  | Engine Cranks But Will Not Start
4-5 |  |  |  |  |  | Not Used
6 | Brn | 418 | Transmission TCC PWM Solenoid | Transmission U |  | TCC Inoperative
7 | Ppl | 1807 | Serial Data (Class 2) | DLC 2 |  | No Scan Tool Communications
8 | Dk Grn/Wht | 459 | A/C Cutch Control | A/C Clutch Relay D7 | P1545 P1539 | A/C Clutch Inoperative, A/C on At All Times
9 | Brn/Wht | 419 | MIL Control | * | P1661 | MIL On All Times or MIL Inoperative
10 | Dk Grn/Wht | 428 | EVAP Canister Purge Solenoid Valve Control | EVAP Canister Purge Solenoid Valve B | P0443 P0441 | Purge Inoperative or Purge On At All Times (3)
11 | Tan/Blk | 422 | Transmission TCC Solenoid | Transmission T |  | TCC Inoperative or On At All Times
12 | Red/Blk | 380 | A/C Refrigerant Pressure Sensor Signal | A/C Refrigerant Pressure Sensor C | P0530 | A/C Inoperative
13-15 |  |  |  |  |  | Not Used
16 | Pnk | 1439 | Change Oil Lamp Control | Change oil lamp | P1663 | Light ON at all times or light OFF at all times.
17-20 |  |  |  |  |  | Not Used
21 | Lt Blu | 1876 | Bank 1 (Left) KS Signal | Left Knock Sensor | P0327 (3) | Lack of performance and/or detonation
22 | Dk Blu | 496 | Bank 2 (Right) KS Signal | Right Knock Sensor | P0332 (3) | Lack of performance and/or detonation
23-27 |  |  |  |  |  | Not Used
28 | Yel/Blk | 1227 | Transmission Fluid Temperature Sensor Signal | Transmission L | P0712 P0713 | Early or Delayed Transmission Shifts
29 |  |  |  |  |  | Not Used
30 | Tan | 800 | Serial Data (UART) | * |  |
31-32 |  |  |  |  |  | Not Used