Step | Action | Value(s) | Yes | No | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Was the Data Link Communications Diagnostic System Check performed? | -- | Go to Step 2 | |||||||||
2 | Attempt to establish communication with the other modules connected to the circuit.
Does the scan tool communicate with the other modules? | -- | Go to Step 3 | Go to Step 20 | ||||||||
3 |
Does the resistance measure less than the specified value? | .5 ohms | Go to Step 5 | Go to Step 6 | ||||||||
4 |
Does the scan tool communicate with the other modules? | -- | Go to Step 7 | Go to Step 8 | ||||||||
5 | Inspect for poor connections at connector C1 terminal 17. Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems. Did you find and correct the poor connection condition? | -- | Go to Step 9 | Go to Step 10 | ||||||||
6 | Locate and repair an open in the heater and A/C control serial data circuit. Is the repair complete? | -- | Go to Step 9 | -- | ||||||||
7 | Replace the EBTCM. Is the replacement complete? | -- | Go to Step 9 | -- | ||||||||
8 |
Does the scan tool communicate with the other modules? | -- | Go to Step 12 | Go to Step 13 | ||||||||
9 | Attempt to establish communications with the heater and A/C control. Does the scan tool communicate with the heater and A/C control? | -- | System OK | -- | ||||||||
10 |
Did you find and correct any conditions? | -- | Go to Step 9 | Go to Step 12 | ||||||||
11 | Replace the PSCM. Is the replacement complete? | -- | Go to Step 9 | -- | ||||||||
12 | Replace the heater and A/C control. Is the replacement complete? | -- | Go to Step 9 | -- | ||||||||
13 |
Does the scan tool communicate with the other modules? | -- | Go to Step 11 | Go to Step 14 | ||||||||
14 |
Does the scan tool communicate with the other modules? | -- | Go to Step 15 | Go to Step 16 | ||||||||
15 | Replace the SIR module. Is the replacement complete? | -- | Go to Step 9 | -- | ||||||||
16 |
Did you find a short to ground in the serial data circuit? | -- | Go to Step 17 | Go to Step 18 | ||||||||
17 | Locate and repair the short to ground in the serial data circuit. Is the repair complete? | -- | Go to Step 9 | -- | ||||||||
18 | Test the serial data circuit, of the DLC, for a short to voltage between terminal 12 and each module. (Turn ON the ignition, leaving the engine OFF, when testing for a short to voltage.)
Did you find a short to voltage in the serial data circuit? | -- | Go to Step 19 | Go to Step 21 | ||||||||
19 | Locate and repair the short to voltage in the serial data circuit. Is the repair complete? | -- | Go to Step 9 | -- | ||||||||
20 |
Did you find and correct a poor connection condition? | -- | Go to Step 2 | Go to Step 4 | ||||||||
21 | Test the serial data circuit, of the DLC, for an open between terminal 12 and each module. Refer to Testing for Continuity in Wiring Systems.
Did you find an open in the serial data circuit? | -- | Go to Step 9 | -- |
