B198A

B198A-ALL DOOR SECONDARY UNLOCK CONTROL CIRCUIT LOW





For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
At all times.

- Set Condition:
The Totally Integrated Power Module (TIPM) detects a low circuit on the Secondary Door Unlock Relay Control circuit for more than five seconds, even though it is not attempting to unlock the doors.





NOTE: This test is only for Right Hand Drive vehicles.

1. CHECK TROUBLE CODE
1. Turn the ignition on.
2. Record all trouble codes.
3. With the scan tool, erase DTCs.
4. Turn ignition off and remove the key.
5. Lock all doors and wait two minutes.
6. Turn the ignition on.
7. With the scan tool, read DTCs.

Does the scan tool display B198A-ALL DOOR SECONDARY UNLOCK CONTROL CIRCUIT LOW?

Yes

- Go To 2

No

- Problem is intermittent and not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors and repair as necessary. Make sure the relay is completely plugged in.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK FOR RELAY OPEN OR SHORTED




1. Turn the ignition off.
2. Remove the Secondary Door Unlock Relay from the I.P. End Bracket (behind the right kick panel).
3. Install a substitute relay in place of the Secondary Door Unlock Relay.
4. Turn the ignition on.
5. With the scan tool, erase DTCs.
6. Turn ignition off and remove the key.
7. Lock all doors and wait two minutes.
8. Turn the ignition on.
9. With the scan tool, read DTCs.

Does the scan tool display B198A-ALL DOOR SECONDARY UNLOCK CONTROL CIRCUIT LOW?

Yes

- Go To 3

No

- Replace the original relay.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. CHECK THE (P391) SECONDARY DOOR UNLOCK RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND




1. Turn the ignition off.
2. Remove the Secondary Door Unlock Relay.
3. Disconnect the TIPM C7 connector.
4. Measure the resistance between ground and the (P391) Secondary Door Unlock Relay Control circuit in the relay connector.

Is the resistance below 1,000 Ohms?

Yes

- Repair the (P391) Secondary Door Unlock Relay Control circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. CHECK THE (P391) SECONDARY DOOR LOCK RELAY CONTROL CIRCUIT FOR AN OPEN




1. Measure the resistance of the (P391) Secondary Door Unlock Relay Control circuit between the Relay connector and the TIPM C7 connector.

Is the resistance below 2.0 Ohms?

Yes

- Replace the Totally Integrated Power Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the (P391) Secondary Door Unlock Relay Control circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.