A/T Mode Switch - No Crank In Neutral Position

BULLETIN NUMBER
SB93-05-011

ISSUE DATE
June 1993

GROUP
TRANSMISSION

RODEO (UC) AND TROOPER (UX) NO START IN NEUTRAL

AFFECTED VEHICLES

1991-93 Rodeo (UC) and 1992-93 Trooper (UX) models equipped with V6 engine and automatic transmission before the following VINS:

^ VIN P4310980 Rodeo 2-wheel drive
^ VIN P4314257 Rodeo 4-wheel drive
^ VIN P7906876 Trooper

SERVICE INFORMATION

Some affected vehicles may experience a "no start" (no crank) condition when the A/T selector lever is in the neutral position, caused by A/T mode switch failure. Follow the diagnosis procedure in this Service Bulletin to determine if the mode switch requires replacement.

If mode switch replacement is necessary, install the mode switch listed in the "Parts Information" section of this Bulletin.

SERVICE PROCEDURE

NOTE:
Refer to the appropriate Electrical Troubleshooting Manual for connector number references.

Check mode switch operation as follows:

1. Disconnect the starter solenoid connector (C130 on Trooper; C112 on Rodeo).

2. On 3.2L V6 models, remove the air cleaner assembly.





3. Disconnect the mode switch connector (C113 on Trooper; C139 on '91-92 Rodeo; C135 on '93 Rodeo). See Figure 1.





4. On the mode switch side of the connector, install an ohmmeter between the red wire (violet wire on '91 models) and the yellow wire (Figure 2).

5. a. If the ohmmeter reads continuity with the transmission selector lever in any other position other than "P" (Park) or "N" (Neutral), the mode switch requires adjustment. Adjust mode switch as described in Step 12 of this Service Procedure, then recheck mode switch operation starting from Step 3.

After adjusting the mode switch, if the above check still results in continuity with the lever in any other position other than "P" or "N", replace the mode switch (see "Parts Information" section of this Service Bulletin) as described in the appropriate Workshop Manual. Then follow the mode switch adjustment procedure described in Step 12.

b. If the ohmmeter reads continuity with the transmission selector lever in "P" or "N", but the engine still does not start with the lever in "N", continue with this diagnosis procedure.

6. Remove the ohmmeter.





7.a. Check mode switch circuit from the starter switch by connecting a voltmeter between the mode switch connector blue/black wire (white/green wire on '91-92 Rodeo) on the harness side, and ground (Figure 3).

b. Turn the ignition key to "START" and note voltmeter reading.

8.a. If voltmeter reading is 0 volts, check the circuit from main fuse 1 to the mode switch connector.

b. If voltmeter reading is 12 volts, check the ground circuit from the mode switch connector to ground (on Trooper LS models, anti-theft controller ground). Repair circuit as required.

9. Reconnect mode switch connector.

10. Reconnect starter solenoid connector.

11. On 3.2L V6 models, reinstall air cleaner assembly.





12. Mode Switch Adjustment Procedure (Figure 4)

a. Place gear selector lever in "N".

b. Under the vehicle, remove A/T linkage from the mode switch.

c. Remove mode switch cover.

d. Loosen the two 6 mm screws in the mode switch.

e. Rotate the mode switch until the slot in the mode switch aligns with the selector shaft bushing, and insert a 3/32" (2.4 mm) drill bit or punch into the slot.

f. Tighten the screws to 113 in.lbs. Remove the drill bit.

g. Reinstall mode switch cover.

h. Reinstall gear selector lever.

PARTS INFORMATION

Part No. Description

8-96017-178-0 Mode Switch (Trooper UX)
8-96017-197-0 Mode Switch (Rodeo)

FLAT RATE MANUAL UPDATE INFORMATION





Use the revised labor operation. See illustration.