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1997 JEEP CHEROKEE XJ 4.0L

STRIPPED ENGINE HARNESS — WIRING DIAGRAMS

Source: Factory Service Manual Section 8W • For standalone/swap harness builds

Use +/− controls to zoom • Click any label to trace a wire across all sheets
Sheet 1: Power Distribution & Relays
8W-30 FUEL/IGNITION SYSTEM - POWER DISTRIBUTION 1997 XJ 4.0L Standalone Harness + - BATTERY 12V A0 RD 6 AWG (BATTERY POSITIVE BUS) IGN SW ST-RUN F12 F12 DB/WT 18 AWG (FUSED IGN - RUN/START) 20A ASD RELAY 85 86 30 87 85 K51 DB/YL 18ga PCM C3 (ASD control) 25A A16 RD/LG 16ga A142 DG/OR 18 AWG (ASD RELAY OUTPUT BUS) IGN COIL (+) K19 GY to PCM A7 (-) INJECTORS 1-6 K11,K13,K15,K14,K12,K16 O2 HEATERS 15A F142 DG/WT 20ga EVAP SOL K52 PK/BK to PCM C20 FUEL PUMP RELAY 85 86 30 87 K31 BR 18ga PCM C3 (FP control, pin C19) 15A A61 DG/BK 16ga A141 DG/WT 14ga FUEL PUMP MODULE G302 Z1 BK 14ga 20A A22 varies 16ga PCM C1 Pin A22 (constant B+) Z0 BK 4-8 AWG G100 (ENGINE BLOCK)
Sheet 2: Engine Sensors
8W-30 FUEL/IGNITION SYSTEM - ENGINE SENSORS 1997 XJ 4.0L Standalone Harness PCM (C1) 5V REF SEN GND A17 K7 OR 18ga A4 K167 BR/YL 18ga G101 CKP SENSOR Bellhousing K7 OR 18ga (5V) A8 K24 GY/BK 18ga (SIGNAL) K167 BR/YL 18ga (GND) CMP SENSOR Distributor K7 OR (shared 5V) A18 K44 TN/YL 18ga (SIGNAL) K167 BR/YL (shared GND) TPS Throttle Body A23 K22 OR/DB 18ga (5V) A15 K21 BK/RD 18ga (SIGNAL) K167 BR/YL (shared GND) MAP SENSOR Intake Manifold C2 B31 K6 VT/OR 18ga (5V from C2) A27 K1 DG/RD 18ga (SIGNAL) IAT SENSOR Intake A16 K2 TN/BK 18ga (SIGNAL) (2-wire thermistor, shared GND) ECT SENSOR Coolant ECT K2 TN/BK 18ga (SIGNAL) UPSTREAM O2 A24 K41 BK/DG 18ga DOWNSTREAM O2 A25 K141 TN/WT 18ga O2 Heaters: A142 (DG/OR) from ASD via 15A fuse Heater GND: Z1 BK to G101
Sheet 3: Fuel Injectors
8W-30 FUEL/IGNITION SYSTEM - FUEL INJECTORS 1997 XJ 4.0L Standalone Harness A142 DG/OR 18 AWG (FROM ASD RELAY PIN 87) ASD PCM CONNECTOR C2 (WHITE) (+) INJ #1 A142 K11 WT/DB 18ga B4 (+) INJ #2 A142 K13 YL/WT 18ga B15 (+) INJ #3 A142 K15 PK/BK 18ga B5 (+) INJ #4 A142 K14 LB/BR 18ga B16 (+) INJ #5 A142 K12 TN 18ga B6 (+) INJ #6 A142 K16 LG/BK 18ga B12 FIRING ORDER: 1-5-3-6-2-4 Cylinder 1 = front of engine, Cylinder 6 = rear (firewall)
Sheet 4: Ignition Coil & IAC Motor
8W-30 FUEL/IGNITION SYSTEM - IGNITION COIL & IAC MOTOR 1997 XJ 4.0L Standalone Harness IGNITION COIL A142 DG/OR (FROM ASD) IGNITION COIL (+) (-) K19 GY 18ga PCM C1 Pin A7 (Coil driver) Distributor provides CMP signal only. PCM controls all ignition timing via K19. IAC MOTOR (4-WIRE STEPPER) IAC MOTOR Throttle body PCM C1 K39 GY/RD A11 Coil 1 K60 YL/BK A10 Coil 2 K40 BR/WT A20 Coil 3 K59 VT/BK A19 Coil 4 No external power needed. PCM drives both stepper phases directly. Incorrect wiring = erratic idle.
Sheet 5: Charging & Starting Systems
8W-20/21 CHARGING SYSTEM & STARTING SYSTEM 1997 XJ 4.0L Standalone Harness CHARGING SYSTEM BATTERY A0 RD 6ga GENERATOR Alternator F.LINK A11 BK/WT 6 AWG (CHARGE OUTPUT) G103 Z0 BK 6ga PCM C2 Pin B10 K20 DG 18ga (FIELD CTRL) PCM C3 Pin C25 K72 DG/OR 18ga (FIELD SRC) STARTING SYSTEM BATTERY STARTER RELAY 85 86 30 87 30A A0 RD 6ga STARTER Solenoid S T40 BR/LG 14ga IGN SWITCH START pos. A41 YL/RD 14ga G106 Z1 BK 14ga A/T: Add PARK/NEUTRAL switch in series with A41 M/T: Add CLUTCH INTERLOCK switch in series with A41
Sheet 6: Ground Distribution
8W-15 GROUND DISTRIBUTION 1997 XJ 4.0L Standalone Harness ENGINE BLOCK (PRIMARY GROUND POINT) BATTERY (-) Z0 BK 4-8 AWG G100 GENERATOR Case Z0 BK 6 AWG G103 PCM C1 A31 Z12 BK/TN 14 AWG G101 PCM C1 A32 Z12 BK/TN 14 AWG PCM C1 A4 K167 BR/YL 18ga Sensor GND O2 SENSORS Z1 BK 18ga STARTER Relay pin 86 Z1 BK 14 AWG G106 FUEL PUMP Module (-) FRAME RAIL Z1 BK 14 AWG G302 GROUNDING RULES: 1. Clean bare metal + star washer at every point 2. Never mix sensor ground (K167) with power ground (Z0)
Sheet 7: PCM Pinout Summary
PCM CONNECTOR PINOUT - ACTIVE PINS ONLY 1997 XJ 4.0L Standalone Harness - JTEC PCM C1 - BLACK A4 K167 BR/YL Sen GND A7 K19 GY Coil drv A8 K24 GY/BK CKP sig A10 K60 YL/BK IAC #2 A11 K39 GY/RD IAC #1 A15 K21 BK/RD TPS sig A16 K2 TN/BK IAT sig A17 K7 OR 5V ref A18 K44 TN/YL CMP sig A19 K59 VT/BK IAC #4 A20 K40 BR/WT IAC #3 A22 -- -- Fused B+ A23 K22 OR/DB TPS 5V A24 K41 BK/DG O2 up A25 K141 TN/WT O2 down A27 K1 DG/RD MAP sig A31 Z12 BK/TN GND #1 A32 Z12 BK/TN GND #2 C2 - WHITE B4 K11 WT/DB Inj #1 B5 K15 PK/BK Inj #3 B6 K12 TN Inj #5 B10 K20 DG Gen fld B12 K16 LG/BK Inj #6 B15 K13 YL/WT Inj #2 B16 K14 LB/BR Inj #4 B23 G60 GY/YL Oil prs B27 G7 WT/OR VSS B31 K6 VT/OR MAP 5V C3 - GRAY C15 K118 PK/YL Batt tmp C19 K31 BR FP relay C20 K52 PK/BK EVAP ctl C25 K72 DG/OR Gen src C-- K51 DB/YL ASD ctl PIN CIRC COLOR FUNCTION PIN CIRC COLOR FUNCTION PIN CIRC COLOR FUNCTION HARNESS SUMMARY C1 active pins: 18 of 32 C2 active pins: 10 of 32 C3 active pins: 5 of 32 Total wires: 33 PCM + 19 external = 52 total ALL UNUSED PINS LEFT EMPTY All wires 18 AWG unless noted otherwise Pin numbering per Chrysler FSM convention Verify pin locations against your specific PCM connector WIRE COLOR CODES BK=Black OR=Orange BL=Blue PK=Pink BR=Brown RD=Red DB=Dk Blue TN=Tan DG=Dk Green VT=Violet GY=Gray WT=White LB=Lt Blue YL=Yellow LG=Lt Green
Wire Color Reference Key
BK = Black
BL = Blue
BR = Brown
DB = Dark Blue
DG = Dark Green
GY = Gray
LB = Light Blue
LG = Light Green
OR = Orange
PK = Pink
RD = Red
TN = Tan
VT = Violet
WT = White
YL = Yellow
CONNECTOR & TERMINAL PARTS LIST

The 1997 XJ JTEC PCM uses three 32-pin Delphi Micro-Pack 100 connectors. Below are the parts needed to build or repair the harness-side connectors.

PCM Connector Bodies (32-Way Female)

C1 — Black Connector
Power grounds, coil driver, ignition, sensor signals
Mopar: 05014013AA • JTEC Body: S2312
C2 — White Connector
Fuel injector drivers, data link, A/C, fan relay
Mopar: 05014012AA • JTEC Body: S2340
C3 — Gray Connector
ASD relay, fuel pump relay, MIL, speed sensor
Mopar: 05014011AA • JTEC Body: S2314
Shop ECM/PCM Connector Kits →customconnectorkits.com

Terminal Pins (Female)

Delphi / Aptiv Micro-Pack 100 Female Terminal
Fits all three 32-pin PCM connectors (C1, C2, C3). Accepts 18–16 AWG wire.
TE/AMP: 3-1447221-3 • Mopar: 04882087 • Delphi: 12084912
Qty needed: ~50 terminals (32 per connector, order extras for crimping practice)
Shop Micro-Pack Terminals →customconnectorkits.com

Recommended Crimp Tool

Delphi / Aptiv Micro-Pack Crimp Tool
Proper crimps are critical — a bad crimp causes intermittent faults that are nearly impossible to diagnose. Use the correct Micro-Pack ratcheting crimper, not generic pliers or weatherpack tools.
Shop Crimp Tools →customconnectorkits.com

Quick Reference

PartPNQty
C1 Body (Black, 32-pin)05014013AA1
C2 Body (White, 32-pin)05014012AA1
C3 Body (Gray, 32-pin)05014011AA1
Female Terminal Pins04882087~50
Terminal Locks / TPA—3
18 AWG GXL Wire (assorted)—~100 ft
All wire colors, circuit codes, and pin assignments per 1997 Jeep Cherokee XJ FSM Section 8W.
Always verify against your specific vehicle before cutting or connecting any wires.