B198A

B198A-ALL DOOR SECONDARY UNLOCK CONTROL CIRCUIT LOW - TIPM





For a complete wiring diagram refer to Diagrams/Electrical.

- When Monitored:

At all times.

- Set Condition:

The TIPM detects a low circuit on the Secondary Door Unlock Relay Control circuit for more than 5 seconds, even though it is not attempting to unlock the doors.





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

Diagnostic Test

1. CHECK TROUBLE CODE

Turn the ignition on.

Record all trouble codes.

With the scan tool, erase DTCs.

Turn ignition off and remove the key.

Lock all doors and wait 2 minutes.

Turn the ignition on.

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. Ensure the relay is completely plugged in.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

2. CHECK FOR RELAY OPEN OR SHORTED





Turn the ignition off.

Remove the Secondary Door Unlock Relay from the I.P. End Bracket (behind the right kick panel).

Install a substitute relay in place of the Secondary Door Unlock Relay.

Turn the ignition on.

With the scan tool, erase DTCs.

Turn ignition off and remove the key.

Lock all doors and wait 2 minutes.

Turn the ignition on.

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 BODY VERIFICATION TEST - VER 1. Body Verification Test

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





Turn the ignition off.

Remove the Secondary Door Unlock Relay.

Disconnect the TIPM C7 connector.

Measure the resistance between ground and the (P391) Secondary Door Unlock Relay Control circuit in the relay connector.

Is the resistance below 1,000.0 ohms?

Yes

- Repair the (P391) Secondary Door Unlock Relay Control circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 4

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





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 BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Repair the (P391) Secondary Door Unlock Relay Control circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test