Tester Installation

DESCRIPTION
Installing the transmission tester at the transmission connector allows separation of the vehicle electronics from transmission electronics. Disconnecting normal vehicle electronics will set additional DTCs and cause firm shifts. (Disconnecting the transmission connector defaults transmission to maximum line pressure).

NOTE: During tester usage additional DTCs may be set. Therefore, it is important that all DTCs are erased after service has been made. To verify elimination of all DTCs rerun On-Board Diagnostic.

NOTE: The following should be used to assist in diagnosis of electronically controlled transmissions:
- powertrain management.
- Transmission Tester Manual (provided with tester).
- wiring and vacuum diagrams.

PROCEDURE
1. Disconnect vehicle wiring harness at transmission connector.

CAUTION: Do not attempt to pry off connectors with a screwdriver. This will damage the connector and could result in transmission concerns.

2. Turn tester SOLENOID SELECT switch to the OHMS CHECK position.
3. Connect appropriate tester interface cable and overlay to transmission and tester.

CAUTION: Route all cables away from heat source to prevent damage to cables.

4. Install a line pressure gauge into line pressure tap on transmission.

CAUTION: Route gauge line away from heat sources to prevent damage to line.

5. Plug transmission tester power supply into cigar lighter receptacle. At this time, all LEDs should illuminate for a short period and then turn off. This is the tester internal circuit check.
6. Position BENCH/DRIVE switch to BENCH mode.