GM Import / GEO >> Prizm 1.6L/1.8L (1992 – 1997)

ModelYearEngine identificationSystem
Prizm 1.6L1992-97VIN  position 8 =  6TCCS
Prizm  1.8L1992-97VIN  position 8 = 8TCCS

General information

  • Malfunction indicator lamp (MIL) will illuminate if certain faults are recorded.
  • ECM operates in backup mode if sensors fail , to enable vehicle to be driven to repair shop.
  • 1992-95: Trouble codes can be displayed by the MIL or by using a Scan Tool connected to the data link connector (DLC).
  • 1996-97: Trouble codes can only be displayed by using a Scan Tool connected to the data link connector (DLC).

Accessing

  • Switch ignition ON .
  • Jump data link connector (DLC) terminals E1 and TE1 [1].
  • Count MIL flashes. Note trouble codes. Compare with trouble code table.
  • Each trouble code consists of two groups of one or more flashes [2] A, displayed as follows:
o The first group of flashes indicate the ‘tens’ of the trouble code.
o The second group of flashes indicate the ‘units’ of the trouble code.
o A short pause separates ‘tens’ and ‘units’ [2] B.
o A long pause separates each trouble code [2] C.
o For example: Trouble code 21 displayed [2].
• Each trouble code will be displayed three times in ascending order, followed by the MIL flashing ON-OFF continuously. • If no trouble codes are stored the MIL will either:
o Flash trouble code 51 then flash ON-OFF continuously, indicating correct functioning of diagnostic system.
o Flash ON-OFF continuously without flashing code 51, indicating a malfunction with either the Idle switch, NC switch or the park/neutral circuits.
• Trouble codes can also be displayed by using a Scan Tool connected to the data link connector (DLC) [1].

1993-95 -normal mode

  • Switch ignition ON.
  • Jump data link connector (DLC) terminals E1 and TE1 [3]
  • Count MIL flashes. Note trouble codes. Compare with trouble code table.
  • Each trouble code consists of two groups of one or more flashes [2] [A].
o The first group of flashes indicate the ‘tens’ of the trouble code.
o The second group of flashes indicate the ‘units’ of the trouble code.
o A short pause separates ‘tens’ and ‘units’ [2] [B].
o A long pause separates each trouble code [2] [C].
o For example: Trouble code 21 displayed [2].
  • Trouble codes will be displayed in ascending order.
  • If no trouble codes are stored the MIL will flash ON-OFF continuously.
  • Remove jump lead.
  • Switch ignition OFF.
  • Rectify faults as necessary.
  • Trouble codes can also be displayed by using a Scan Tool connected to the data link connector (DLC) [3]

1993-95 -test mode

  • Switch ignition OFF.
  • Jump data link connector (DLC) terminals E1 and TE2 [3]
  • Switch ignition ON .
  • Ensure malfunction indicator lamp (MIL) flashes ON-OFF continuously.
  • Start engine.
  • Drive vehicle at over 6 mph to meet conditions of customer complaint.
  • Stop vehicle. Do not switch ignition OFF.
  • With data link connector (DLC) terminals E1 and TE2 jumped, jump terminals E1 and TE1 [3]
  • Count MIL flashes. Note trouble codes. Compare with trouble code table.
  • Switch ignition OFF.
  • Remove jump leads.
  • Rectify faults as necessary.
NOTE: Codes 42 and 43 may be produced if this procedure is NOT carried out correctly. Code 51 will be produced during this procedure and can be ignored.

1996-97

• Trouble codes can only be displayed by using a Scan Tool connected to the data link connector (DLC) [4].

Erasing

Method 1 -1992

  • Ensure ignition switched OFF.
  • Remove STOP fuse (15A) from LH kick panel fuse box for at least 30 seconds [5].
  • Reinstall fuse.
  • Repeat accessing procedure to ensure no trouble codes remain in ECM fault memory.
  • Trouble codes can also be erased by using a Scan Tool connected to the data link connector (DLC).

Method 1 -1993-97

  • Ensure ignition switched OFF.
  • Remove EFI F-HTR fuse (15A) from engine bay fuse box for at least 30 seconds [6]
  • Reinstall fuse.
  • Repeat accessing procedure to ensure no trouble codes remain in ECM fault memory.
  • Trouble codes can also be erased by using a Scan Tool connected to the data link connector (DLC).

Method 2

NOTE: Disconnecting battery ground lead may cause driveability problems until the engine management system relearns basic values.
  • Ensure ignition switched OFF.
  • Disconnect battery ground cable for at least 30 seconds.
  • Reconnect battery ground cable.
  • Repeat accessing procedure to ensure no trouble codes remain in ECM fault memory.
  • Trouble codes can also be erased by using a Scan Tool connected to the data link connector (DLC).
NOTE: Disconnecting battery ground lead may also erase memory from electronic units, such as radio.

Trouble code  identification

Scan codeFault locationProbable cause
PO,P2,UORefer to OBO-II trouble code tables
P1300Ignition control -circuit malfunctionWiring, ignition coil, ECM
P1335Crankshaft position (CKP) sensor -circuit malfunctionWiring, CKP sensor, ECM
P1500Starter signal -circuit malfunctionWiring, ignition switch, engine control relay, ECM
P1600Engine control module (ECM) -supply voltageWiring, ECM
 
Flash typeFault locationProbable cause
11111No fault found
12Crankshaft position (CKP) sensor/camshaftposition (CMP) sensor -no signalWiring, CKP/CMP sensor, ICM, ECM
13Crankshaft position (CKP) sensor no signal overidleWiring, CKP sensor, ICM, ECM
14Ignition signal -no signalWiring, ICM, ECM
16Transmission control signalWiring, ECM
21Oxygen sensor (02S) 1lheated oxygen sensor (H02S) 1 -circuit malfunctionWiring open circuit/short circuit, 02S/H02S, ECM
22Engine coolant temperature (ECT) sensor circuitmalfunctionWiring open circuit/short circuit, ECT sensor, ECM
24Intake air temperature (IAT) sensor -circuitmalfunctionWiring open circuit/short circuit, IAT sensor, ECM
25Weak mixtureWiring, air leak, ignition system, fuel pressure,injector(s), MAF sensor, ECT sensor, IAT sensor,02S/H02S, ECM
26Rich mixtureWiring, ignition system, fuel pressure, injector(s), MAF sensor, ECT sensor, IAT sensor, 02S/H02S, ECM
27Oxygen sensor (02S) 21heated oxygen sensor (H02S) 2 -circuit malfunctionWiring open circuit/short circuit, 02S/H02S 2, ECM
31Manifold absolute pressure (MAP) sensor circuitmalfunctionWiring open circuit/short circuit, MAP sensor, ECM
41Throttle position (TP) sensorWiring open circuit/short circuit, TP sensor, ECM
42Vehicle speed sensor (VSS)Wiring open circuit/short circuit, VSS, ECM
43Starter signalWiring, ignition switch, ECM
51 [1]Switch signal -AlC switch ON during diagnosisWiring, AlC switch, AlC control module, ECM
Switch signal -PNP switch not in P or N during diagnosisWiring, PNP switch, ECM
Switch signal -throttle position (TP) sensor, noclosed throttle signal during diagnosisWiring, TP sensor, ECM
52Knock sensor (KS)Wiring, KS, ECM
71Exhaust gas recirculation (EGR) system -malfunctionWiring open circuit/short circuit, hose leak! blockage, EGRT sensor, EGR solenoid, ECM