PCM Engine Control
DIAGNOSTIC CHARTSI On-Board Diagnostic (OBD) System Check
Chart 1 On-Board Diagnostic System Check
II Engine Cranks, but Won't Start
Chart 2 Engine Cranks But Won't Start
III No Malfunction Indicator Lamp
Chart 3 No Malfunction Indicator Lamp
IV No Scan Data or Won't Flash DTC 12
Chart 4 No Scan Data/Won't Flash 12
NOTE: Diagnostic trouble codes cause the malfunction indicator lamp to illuminate.
TROUBLE CODES
11 Transmission Diagnostic Trouble Codes Present
12 Diagnostic Check Only (Flash DTC)
13 Oxygen Sensor Circuit - Open/Not Ready
14 ECT Circuit - Temperature Out of Range High
15 ECT Circuit - Temperature Out of Range Low
17 PCM Fault - Pull-up Resistor
19 6X Signal Fault - No 6X Signal Between Reference Pulses
21 TP Sensor Circuit - Voltage Out of Range High
22 TP Sensor Circuit - Voltage Out of Range Low
23 IAT Circuit - Temperature Out of Range Low
24 VSS Circuit - No Signal
25 IAT Circuit - Temperature Out of Range High
26 Quad Driver Output Fault
32 EGR System Fault
33 MAP Circuit - Voltage Out of Range High
34 MAP Circuit - Voltage Out of Range Low
35 Idle Air Control (IAC) - RPM Out of Range
41* IC Control Circuit - Open or Shorted
42* Bypass Circuit - Open or Shorted
43 Knock Sensor Circuit (KS) - Open or Shorted
44 Oxygen Sensor Indicates System Lean
45 Oxygen Sensor Indicates System Rich
46 Power Steering Pressure Circuit - Open
49 RPM - High Idle (Vacuum Leak)
51 PCM Memory Error
55 A/D Error
81 ABS Message Fault
82 PCM - Internal Communication Fault
*41 & 42 Simultaniously - Ignition Control (IC) Circuit - Grounded/Bypass Open
PCM INFORMATION FLAGS
These information flags do not indicate a failure and will not turn on the malfunction indicator lamp (MIL). Information flags are used as diagnostic aids to the technician when hard diagnostic trouble codes or intermittent problems occur.
- Engine information flags will not be flashed on the malfunction indicator lamp (MIL) and they can only be read with a Scan tool.
- Automatic Transaxle Information Flags will flash on the HOT light.
ENGINE INFORMATION FLAGS
16 Electrical Variable Orifice (EVO) Fault
27 Quick Quad Driver Module
48 Reference Input - Intermittent or Noisy
52 Battery Voltage Out of Range
53 Knock Sensor Circuit - Knock Present
54 Five Volt Reference Ground
58 Battery Voltage Unstable
63 Option Check Sum Error
71 Cooling System - Temperature High
72 Cooling System - Temperature Low
73 ECT Unstable
74 ECT/Trans Temperature Sensor Ratio Error
75 IAT Unstable
76 TP Sensor Voltage vs MAP Voltage - Out of Range
83 Low Coolant Flag
84 PCM - Internal Communication Failure