DR-1A CODE to DR TEST Chart (Checking for Fault Codes)

1. Connect diagnostic read-out tool to engine harness connector.
2. Put system in Diagnostic Mode and record all codes.
3. If code sequence is 22-28-25 or 22-28-26, proceed to test indication.
4. Turn ignition switch Off, then disconnect the computer 14-way connector for 1 minute and then reconnect it.
5. Start engine and run for two minutes, then turn engine Off.
6. Put system into diagnostic mode and record all codes.
7. If codes displayed are the same, proceed to step 8, If codes are not repeated, check for loose of corroded wiring connections in the circuit.
8. Initiate the appropriate diagnosis for the following fault code displays:
a. Code sequence 88-14-55. Proceed to Test 10 if a cold engine problem or Test 18 if a warm engine problem.
b. Code sequence 88-11-14-15 or 88-11-14-22-55. Proceed to Test 2.
c. Code sequence 88-13-14-55. Proceed to Test 3.
d. Code sequence 88-14-17-55. Proceed to Test 4.
e. Code sequence 88-14-18-55. Proceed to Test 5.
f. Code sequence 88-14-22-55. Proceed to Test 6.
g. Code sequence 88-14-24-55 indicates a faulty computer must be replace.
h. Code sequence 88-14-25-55 or 88-14-26-55. Proceed Test 7.
i. Code sequence 88-14-25-26-55 indicates a fault in the ground wire of engine coolant sensor for open circuit to the computer must be repaired.
j. Code sequence 88-14-28-55. Proceed Test 8.
k. Code sequence 88-14-32-55, 88-14-33-55 or 88-11-13-14-16-17-18-55 indicates a faulty computer that must be replaced.
l. Code sequence 88-13-14-17-55 indicates a fault in the ignition switch feed wire to dual solenoids for an open circuit must be repaired.
m. No Code 88 after switch is moved to hold position. Proceed Test 9.
n. No Code 00 indicates a fault in the diagnostic read-out connector ignition and ground wire for open circuits.