Circuit Description
DTC C1358 identifies a TCS motor circuit that shorts to voltage or a TCS motor that has low or no resistance. DTC C1358 will cause one of the following conditions:
| • | The TCS motor cannot be controlled at the commanded current rate. |
| • | The TCS motor will turn in the opposite direction or the TCS motor will not turn at all. |
Conditions for Setting the DTC
DTC C1358 can set only when the TCS motor is commanded off.
A malfunction exists if the EBCM/EBTCM detects an out of range voltage on either of the left front TCS motor circuits indicating a short to voltage or a shorted TCS motor.
Action Taken When the DTC Sets
| • | A malfunction DTC stores. |
| • | The TCS disables. |
| • | The amber TCS indicator turns on. |
Conditions for Clearing the DTC
| • | The condition responsible for setting the DTC no longer exists and the Scan Tool Clear DTC function is used. |
| • | 100 drive cycles pass with no DTC detected. |
Diagnostic Aids
Use the enhanced diagnostic function of the Scan Tool in order to measure the frequency of the malfunction. Refer to the Scan Tool manual or Scan Tool Diagnostics located in this section for the procedure.
If the malfunction is not current perform the following procedure in order to identify an intermittent malfunction in the motor circuitry or connections:
- Wiggle the wires of the affected channel.
- Inspect to see if the DTC resets.
Thoroughly inspect any circuitry that may cause the intermittent complaint for the following conditions:
| • | Rubbed-through wire insulation |
| • | A broken wire inside the insulation |
| • | Backed out terminals |
| • | Improper mating |
| • | Broken locks |
| • | Improperly formed or damaged terminals |
| • | Poor terminal-to-wiring connections |
| • | Physical damage to the wiring harness |
Step | Action | Value(s) | Yes | No | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | Go to Step 2 | |||||||||||||||||
2 | Does DTC C1358 occur intermittently? | -- | Go to Step 3 | |||||||||||||||||
3 |
Is any voltage present during this test? | -- | Go to Step 10 | Go to Step 4 | ||||||||||||||||
4 | Use J 39200 in order to measure the voltage between the 4-way TCS motor pack harness connector terminal B and ground. Is any voltage present during this test? | -- | Go to Step 11 | Go to Step 5 | ||||||||||||||||
5 |
Is the resistance within the specified range? | 0.2-1.5ohms | Go to Step 6 | Go to Step 9 | ||||||||||||||||
6 | Use the J 39200 in order to measure the resistance between the 4-way TCS motor pack connector terminal A and the 4-way TCS motor pack connector terminal B. Is continuity present during the above test? | -- | Go to Step 12 | Go to Step 7 | ||||||||||||||||
7 |
Is there damage which may cause a short to voltage? | -- | Go to Step 13 | Go to Step 8 | ||||||||||||||||
8 |
Does DTC C1358 set as a current DTC during the last three drive cycles? | -- | Go to Step 14 | Go to Step 15 | ||||||||||||||||
9 | Replace the TCS motor pack. Is the repair complete? | -- | -- | |||||||||||||||||
10 | Repair the short to voltage in CKT 564. Is the repair complete? | -- | -- | |||||||||||||||||
11 | Repair the short to voltage in CKT 565. Is the repair complete? | -- | -- | |||||||||||||||||
12 | Repair the short between CKT 564 and CKT 565. Is the repair complete? | -- | -- | |||||||||||||||||
13 | Replace all of the following components that are damaged:
Is the repair complete? | -- | -- | |||||||||||||||||
14 | Replace the EBCM/EBTCM. Is the repair complete? | -- | -- | |||||||||||||||||
15 | The malfunction is intermittent or not present at this time? Is a concern still present? | -- | Go to Diagnostic Aids |
